1 
 
. v 8 
 
 HY-RIB 
 
 HANDBOOK 
 
 ROOFS-FLOORS-WALLS 
 SIDINGS-PARTITIONS 
 CEILINGS —FURRING 
 
 SILOS — TANKS — CONDUITS 
 
 CONCRETE WITHOUT FORMS 
 
 FIFTEENTH EDITION 
 
 TRUSSED CONCRETE STEEL CO. 
 
 YOUNGSTOWN, OHIO 
 
Copyright 
 
 1909 , 1910 , 1911 , 1912 , 1913 , 1914 , 1915 , 1916 
 Trussed Concrete Steel Co. 
 
LLA. 9S'ol4.^ Kii3N\ 
 
 Table of Contents 
 
 Description and Properties of Hy-Rib.Pages 5-9 
 
 Floors of Hy-Rib.Pages 10-21 
 
 Roofs of Hy-Rib.Pages 22-36 
 
 Safe Loads and Specifications 
 
 for Floors and Roofs.Pages 37-41 
 
 Walls and Sidings of Hy-Rib.Pages 42-63 
 
 Partitions of Hy-Rib.Pages 64-91 
 
 Ceilings of Hy-Rib.Pages 92-101 
 
 Furring with Hy-Rib. Pages 102-103 
 
 Residences, Garages, Fences, etc.Pages 104-116 
 
 Farm Buildings .Pages 117-119 
 
 Silos, Tanks, etc.Pages 120-125 
 
 Conduits, Flumes and Culverts.Pages 126-130 
 
 Hy-Rib Bender, Punch and Cutter.Pages 131-135 
 
 Rib Lath and Other Kahn Building Prod¬ 
 ucts .Pages 136-142 
 
 For more explicit references see Indexes Pages 143 and 
 144. 
 

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 Chemical Products Plant (The Trus-Con Laboratories), Detroit, Mich. 
 Warehouses and Tile Plants in various cities. 
 Representatives in Principal Cities. 
 
HY-RIB 
 
 Hy-Rib is a steel sheathing stiffened by rigid deep ribs, 
 manufactured from a single plate of steel. Hy-Rib is a com¬ 
 bined unit of forms, reinforcement, lath and channels for 
 concrete, stucco and plaster. 
 
 In concrete floors and roofs, Hy-Rib eliminates forms. 
 In sidings, partitions and ceilings, Hy-Rib eliminates chan¬ 
 nels and wiring. The mesh of the Hy-Rib provides a per¬ 
 fect surface and key for plaster. Our large factory promptly 
 furnishes Hy-Rib in curved as well as straight sheets. 
 
 Why you should use Hy-Rib 
 
 All forms are eliminated. 
 
 No stiffening channels nor wiring are required. 
 
 Concrete and plaster are perfectly reinforced. 
 
 Labor and time are saved. 
 
 Weight of construction is reduced. 
 
 Available floor space is increased. 
 
 Fireproof,' permanent and economical. 
 
 Where you should use Hy-Rib 
 
 In all buildings, large or small, in roofs, floors, walls, 
 sidings, partitions, ceilings and furring; in arched floors, 
 culverts, conduits, sewers, silos and tanks. 
 
 Hy-Rib lowers the cost of building because it elim¬ 
 inates forms and saves materials, labor and time. Hy-Rib 
 provides permanent, fireproof construction that is more 
 economical than wood which burns and rots. 
 
 The following pages indicate only the more general ap¬ 
 plications of Hy-Rib. Detailed suggestions showing how 
 HY-RIB can be best used in your own particular work 
 will be sent on request. 
 
The Four Types of Hy-Rib 
 
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 7 
 
Hy-Rib—A Kahn Building Product 
 
 It’s the 
 depth of 
 
 the ribs 
 
 that 
 
 counts 
 
 HY-RIB 
 " HY-RIB 
 " HY-RIB 
 " HY-RIB 
 RIB LATH 
 
 Specify Hy-Rib by its depth—Choose the depth of ribs 
 that most closely meets your exact requirements. Our 
 complete line includes all depths from flat Rib Lath to Hy- 
 Rib, with 1 y 2 in. deep ribs—4 distinct types of Hy-Rib 
 (pages 6. 7)—3 types of Rib Lath (see pages 136,137)—all 
 in various gauges. The correct material is thus assured at 
 an economical cost for every possible use in building con¬ 
 struction. 
 
 Properties of Hy-Rib 
 
 Type of HY-RIB 
 
 Fonnorlv 
 
 rsiUcd 
 
 HeLht of 
 Ribs 
 
 SpacMiy of 
 Ribs 
 
 Width of 
 Sheets 
 
 (iaoge Nos. 
 
 U. S. Standard 
 
 I'A Hv-Rib 
 
 Deep-Rib 
 
 i %• 
 
 7 
 
 14' 
 
 22, 24, 26 
 
 ti Hy-Rib 
 
 7-Rib 
 
 11" 
 
 4" 
 
 24' 
 
 22. 24. 26. 28 
 
 H Hy-Rib 
 
 3-Kib 
 
 tr 
 
 S' 
 
 16" 
 
 24. 26. 2- 
 
 Hy-Rib 
 
 6-Rib 
 
 H" 
 
 4' 
 
 20" 
 
 24. 26. 28 
 
 Other gauges are furnished on special order. 
 
 Standard lengths, 6, 8, 10 and 12 feet. 
 
 Other lengths are cut from standard lengths without 
 charge except for waste. 
 
 In ordering no allowance need be made for side laps, 
 as these are provided in the Hy-Rib. Allow 2" for end laps 
 where splice occurs over supports; otherwise, eight inches. 
 
 1/4" and Hy-Rib are shipped in bundles of eight 
 sheets; }£" and y" Hy-Rib in bundles of sixteen sheets. 
 
 Hy-Rib is supplied either painted or unpainted. 
 
 Til" Hy-Rib (only) is furnished curved to any radius 
 greater than 13 inches. 
 
 8 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Bent to Curve 
 
 Our shops can furnish 15/16" Hy-Rib (only) bent to arcs of 
 circles with any radius greater than 13 inches as indicated below. 
 The Hand Power Bender, shown on page 131, may be used for 
 curving 15/16" Hy-Rib in the field. 
 
 HY-RIB CAN BE CURVED 
 TO ANY RADIUS GREATER 
 THAN 13 INCHES 
 
 QUARTER- SEMI-CIRCLE 
 
 CIRCLE 
 
 FOR CIRCULAR TANKS, 
 SEWERS, SILOS, ETC. 
 
 
 CONTINUOUS SHEETj 
 
 
 -MUST BE , 
 
 
 MUST BE 
 
 STRAIGHT 
 
 
 STRAIGHT 
 
 •-VARIABLE-.- 
 
 / /\ / R 
 
 THIS_„ 
 
 
 / ANY PORTION OF \ / \ 
 
 dimension" 
 
 
 f SEGMENT OF A CIRCLE \ 1 \ 
 
 VARIABLE 
 
 For Arch Floor Construction 
 
 METHODS OF BENDING 15/16" HY-RIB 
 
 9 
 
Hy-Rib—A Kahn Building Product 
 
 Arched Hy-Rib Floor in Joseph Bendt Store, Kenosha, Wis., 
 used in conjunction with reinforced concrete beams. 
 
 Arched Hy-Rib Floor—Union Street Ry. Office Building and Car 
 
 Barns, Boston, Mass. 
 
 Hy-Rib provides the form work for slab and sides of beams. 
 Only formwork required is board at bottom of reinforced concrete 
 beam and a few lines of joists as temporary supports for Hy-Rib. 
 
 10 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Floors 
 
 In concrete floors, Hy-Rib eliminates forms and rigidly 
 reinforces the concrete. It simplifies construction, saves 
 time, reduces costs and provides flat or arched floors with 
 any type of beam. 
 
 The use of Hy-Rib in floors is very simple. Lay the 
 Hy-Rib over the supports with the mesh side down and 
 pour on the concrete above. Only enough concrete flows 
 through the mesh to secure a perfect clinch on the steel. 
 The plaster is applied directly to the under surface. Hy- 
 Rib provides in itself the forms and reinforcement for con¬ 
 crete, greatly reducing the cost of construction and saving 
 time in erection. 
 
 Hy-Rib is manufactured with a rib along each side of 
 the sheet, making a perfect interlocking splice when two 
 sheets are joined, as shown on page 76. A similar interlock¬ 
 ing splice is provided at the ends by allowing the two sheets 
 to overlap. In this way absolute continuity of strength and 
 reinforcement is provided throughout the entire floor sur¬ 
 face. 
 
 For arched floors, Hy-Rib is furnished by our shops 
 bent to exact curve, eliminating expensive circular forms. 
 Practical builders know that forms are the most costly and 
 troublesome part of concrete construction. By eliminating 
 all forms, Hy-Rib greatly economizes construction, saving 
 time, labor and money. 
 
 11 
 
Hy-Rib—A Kahn Building Product 
 
 Arched Hy-Rib Floors, Hawaiian Pineapple Co., Honolulu, T. H., 
 showing views from above and below of Hy-Rib ready for 
 concreting. Clear spans of 7' 6" without use of forms 
 or supports. 
 
 12 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Arched Floors 
 
 All the expensive circular forms required in arched floor 
 construction are eliminated by using Hy-Rib, which also 
 provides a rigid, substantial reinforcement for the concrete. 
 
 Our shops furnish Hy-Rib bent to the exact curve, 
 ready to set in place between the beams. All types of 
 arched floors are provided (see pages 9, 14, 15), by this 
 shop-curved Hy-Rib. Note that in many instances the Hy- 
 Rib also furnishes the forms for the sides of the beams, as 
 well as the forms and reinforcement for the floors. The 
 shop bending does away with all special field labor and 
 complicated circular forms. 
 
 Arched Hy-Rib Floors, Power Station, North Adams Power Co., 
 
 Boston, Mass. 
 
 13 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib sheets are laid on top of steel beams, concrete poured 
 in and under surface plastered; no forms are used. Solid concrete 
 or hollow tile may be substituted for fireproofing of steel beam. 
 
 COr'CRE.TE 
 
 ■ t -i-r-t ?'., £■-- 
 
 A.V-Tf.fr? 
 
 
 — -1 f.m - : -“ ---- i 
 
 
 
 
 MV-R.ie.-J PL^STtR-J 
 
 
 Hy-Rib Floor—Type B. C-Eib-latm 
 
 Finished concrete slab is flush with top of steel beam, giving 
 greater head room below beams. Hy-Rib sheets are supported 
 on the sides of beam boxes used as forms for the steel beam 
 fireproofing. No other forms are necessary. 
 
 Flat ceiling is secured by constructing Hy-Rib slab on the 
 lower flange of beam. A light cinder fill over the slab brings the 
 finished floor flush with top of steel beam, and no forms are 
 necessary. 
 
 Hy-Rib Floors with Reinforced Concrete Beams—Types A, B and C 
 
 Hy-Rib sheets are supported on the sides of the beam boxes 
 used as forms for the concrete beams; no other forms necessary. 
 If Hy-Rib extends over concrete beams, punch out the lathing be¬ 
 tween the ribs to permit filling of the beam. 
 
 14 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Ends of Hy-Rib sheets are curved (bending done in our shops) 
 and rest on lower flange of beams. Hy-Rib provides the fireproof¬ 
 ing of steel beams without the use of forms. With reinforced 
 concrete beams the sides of the beam boxes are eliminated as the 
 ends of the Hy-Rib sheets rest on the bottom board. 
 
 Hy-Rib Floor—Type E. 
 
 Arched concrete floors used for carrying heavy loads. Hy-Rib 
 comes to the job bent to exact curve. Concrete is poured in above 
 and plaster applied to the under surface. No forms are necessary 
 for the concrete slabs or sides of beams. 
 
 Concrete floor 
 
 
 mlTj- 
 
 T~ 
 
 
 \ 
 
 Cty-Ct/by 
 ' Jtapte or net/) 
 
 W 
 
 bu/Mnq papers 
 —-joist -* 
 
 
 
 Replacing Wood Flooring with Cement, Terrazo, Tile, Etc. 
 
 In entrance ways, lobbies, halls, bathrooms, etc., in old build¬ 
 ings, the wood flooring is removed and building paper is tacked to 
 the joists. Hy-Rib is placed and concrete poured to proper thick¬ 
 ness. This concrete furnishes the necessary base for tile, terrazo 
 or composition flooring. 
 
 15 
 
Hy-Rib—A Kahn Building Product 
 
 Under Side of Hy-Rib Floor before Plastering. 
 Edward Ford Plate Glass Co., Rossford, Ohio. 
 DeVore-McGormley Co., Engineers. 
 
 Under Side of Hy-Rib Floor (Type C, p. 14) ready for Plastering. 
 District Court House, Fall River, Mass. 
 
 16 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Floor, K. of P. Orphanage, Weatherford, Texas. 
 
 Arched Hy-Rib Floors (Type D, page 15) before attaching Hy-Rib 
 Suspended Ceiling. Detroit Athletic Club Building, 
 Detroit, Mich. 
 
 17 
 
Hy-Rib—A Kahn Building Product 
 
 St. Mary’s Hospital, Milwaukee, Wis. 
 
 Esenwein & Johnson, Archts. J. D. Gregg, Supervising Archt. 
 Arched Hy-Rib floors throughout. Hy-Rib ready for concreting. 
 
 Arched Hy-Rib Floors, Westgate Common Mills, London, Eng. 
 
 18 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Pouring concrete floor, reinforced with IP 2 ” Hy-Rib. 
 St. Andrew School, Singapore, Straits Settlement. 
 Note Chinese women carrying concrete in buckets. 
 
 Concrete Bridge Floor reinforced with l/" Hy-Rib—Viaduct over 
 Nolan Creek, Belton, Texas. 
 
 19 
 
Hy-Rib—A Kahn Building Product 
 
 Load of 1,400 lbs. per sq. ft. after Fire Test of 1700° for Four hours. 
 
 New York Fire Test on Hy-Rib Arch 
 
 (Compiled from official refort of Fire, Load and Water Test made upon cinder 
 concrete floor arches at Columbia Fire Testing Station. New York. Test was con¬ 
 ducted by Ira Ft. IVonlson, /•'. M., in co-operation with City Building Bureaus.) 
 
 Span of segmental arch. 8 feet; thickness at crown, 4^4 inches; 
 total depth at haunches, 15 inches. Concrete—Portland cement 
 1 part, sand 1 part, unsifted cinders 6 parts. 
 
 The concrete floor arch reinforced with Hy-Rib was subjected 
 to a continuous fire below the floor for four hours at an average 
 temperature of 1700 degrees F„ floor carrying at the same time a 
 distributed load of 150 lbs. per square foot. At the end of the four 
 hours the under side of floor while still red hot was subjected to 
 a \ l A inch stream of cold water for five minutes. Then the upper 
 side of the floor was flooded and afterwards the stream was again 
 applied on the under side for five minutes. 
 
 After cooling, the arch was subjected to a load of 600 lbs. per 
 square foot. Later a 6 ft. wide section was cut out of the floor 
 arch and this section was loaded to 1400 lbs. per square foot. 
 Under this severe load the deflection was only •% inch. 
 
 As a result of this test the Building Departments of Manhattan 
 and Brooklyn have approved the use of cinder concrete arches 
 reinforced with Hy-Rib, 4 inches thick at the crown, for loads up 
 to 350 lbs. per sq. ft. and span of 8 feet. 
 
 20 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Loads carried by Arched Hy-Rib Floors 
 
 Arched Concrete Floors are capable of carrying very 
 heavy loads, as has been frequently demonstrated in actual 
 tests. (See New York Fire Test, page 20.) Curved Hy-Rib 
 constitutes an ideal type of combined centering and rein¬ 
 forcement for arched floors. Expensive circular forms are 
 thus eliminated and the Hy-Rib, curved in our own shops, 
 is exceptionally economical in placing and handling. Curved 
 Hy-Rib sheets have far greater stiffness as centering than 
 straight sheets, thus permitting of a wider spacing of sup¬ 
 ports. 
 
 The theoretical design of arches assumes absolutely 
 rigid abutments. The thrust per lineal foot may be figured 
 by means of the following formula: 
 
 1.5 W L 2 
 T =- 
 
 R 
 
 ing 
 
 Where W = the load per square foot 
 
 L = span in feet between supports, and 
 R = rise of the arch in inches. 
 
 The crown thickness may be determined by the follow- 
 formula : 
 
 T 
 
 C = 
 
 12S 
 
 Where C = the crown thickness in inches 
 T = the thrust per-lineal foot, and 
 S = the allowable fibre stress per sq. inch. 
 
 In actual building construction, it is practically impos¬ 
 sible to secure absolutely rigid abutments, unless tie rods 
 are used, and the crown thickness must therefore be ma¬ 
 terially increased over the depth determined by the above 
 formula. There is no question but that an Arched Concrete 
 Floor is capable of carrying considerably more load than a 
 flat slab of the same thickness. For loads on flat slabs, 
 see pages 37 to 39.) 
 
 Our engineers have had wide experience in the design 
 of arched floors under varying conditions. We would be 
 glad to submit our detailed suggestions on the design of 
 arched floors to meet any particular condition. 
 
 21 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Roof for Packard Motor Car Co., Detroit, Mich. 
 
 Albert Kahn, Architect 
 Ernest Wilby, Assoc. 
 
 Hy-Rib roof ready for concreting, Hayden Pump Company, 
 Quincy, Ill. No forms required. 
 
 22 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Roofs 
 
 Thin concrete roofs, light in weight, are built with Hy- 
 Rib without the use of forms. The great saving in dead 
 weight reduces the size and cost of purlins, roof trusses, 
 columns and foundations. 
 
 This thin slab also saves in concrete materials and in 
 the labor of placing them. 
 
 No forms are required with Hy-Rib concrete roofs. 
 Imagine the tremendous saving in false work, especially 
 in industrial plants, where the roofs are often 20 to 50 feet 
 above the ground. Hy-Rib provides a perfect fireproof con¬ 
 struction at economical cost—easily and rapidly installed. 
 
 The construction is very simple. Hy-Rib sheets are 
 placed over purlins, concrete applied and under surface 
 plastered. The simple scaffolding for the plasterers is 
 readily hung from the trusses. 
 
 Corrugated iron sheets, frequently used in roofs and 
 sidings of industrial buildings, are unsatisfactory, as they 
 rust out in a shoYt time and have to be painted frequently. 
 The permanent nature of Hy-Rib concrete makes it far 
 more economical, while its initial cost is but little more than 
 corrugated iron. Hy-Rib concrete roofs entail no expense 
 for maintenance. Owing to the insulating qualities of the 
 concrete construction, a marked saving in cost of heating 
 the building is effected. 
 
 23 
 
Hy-Rib—A Kahn Building Product 
 
 24 
 
 Hy-Rib Roofs before Concreting. Edward Ford Plate Glass Co., Rossford, 
 
 DeVore-McGormley Co., Toledo, O., Engineers. 
 
 Over 1,000,000 sq. ft. of Hy-Rib Construction. United Steel Sash Throughout. 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 25 
 
 Geo. A. Fuller Co., Contractors. Geo. H. Webb. Chief Engineer. 
 
Hy-Rib—A Kahn Building Product 
 
 20 
 
 Hy-Rib Roofs, Featherstone Foundry, Chicago, Ill. Arnold Co., Engineers. 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 27 
 
 Milwaukee Corrugating Co., Milwaukee, Wis. 
 
 Hy-Rib Concrete Roofs and Partitions; United Steel Sash for Windows. 
 
Hy-Rib—A Kahn Building Product 
 
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 28 
 
 Hy-Rib Concrete Roofs and Sidings, Continental Motor Mfg. Co., Detroit, Mich. 
 Albert Kahn, Architect; Ernest Wilby, Associate. 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Roofs, Fayette R. Plumb Tool Co., St. Louis, Mo. 
 
 Hy-Rib Roofs, Kempsmith Mfg. Co., West Allis, Wis. 
 
 29 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Roofs for Stables, City Water Works, Detroit, Mich. 
 Smith, Hinchman & Grylls, Architects. 
 
 SECTION B-6 
 
 SECTION A-A 
 
 DETAIL OF ROOF TILE SUPPORTS WITH 
 RIDS OF HY-RIB EXTENDING HORIZONTALLY 
 
 30 
 
 DFTAIL of roof tile SUPPORTS WITH 
 RIBS OF HYT5IB EXTENDING IN DIRECTION 
 OF ROOF SLOPE 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Concrete Roof, Pennsylvania Rubber Co., Jeannette, Pa. 
 W. G. Wilkins Co., Architect and Engineers. 
 
 Hy-Rib Saw-tooth Roofs and Sidings. 
 Jackson Cushion Spring Co., Jackson, Midi. 
 
 31 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Saw-tooth Roofs, Oliver Chilled Plow Co., Hamilton, Ont. 
 David Dick & Son, Contractors. Prack & Perrine, Architects. 
 
 Hy-Rib Concrete Side Walls and Sawtooth Roofs. 
 Western Sugar Refining Co., San Francisco, Cal. 
 
 32 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Roof for Soft Foundry Building. 
 American Car & Foundry Co., Berwick, Pa. 
 
 Southern Methodist University, Dallas, Texas. 
 
 Shepley, Rutan & Coolidge, Architects, 
 Dome and entire roof of Hy-Rib Construction. 
 
 33 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Dome for Presidential Palace, Republic of Cuba, 
 Havana, Cuba. 
 
 . 
 
 
 ' 
 
 i 
 
 
 
 
 
 
 
 
 aw 
 
 1 
 
 ■ 
 
 BOH 
 
 Roof of 1}4" Hy-Rib, Fairview Mausoleum, 
 
 Milwaukee, Wis. 
 
 34 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Concreting 1^4" Hy-Rib on roof of a building at our 
 Youngstown Plant. 
 
 Under side of Hy-Rib Roof, partly plastered. 
 Note plasterer’s scaffold suspended from steel truss. 
 
 Only one coat of Cement Plaster necessary. 
 
 35 
 
Hy-Rib—A Kahn Building Product 
 
 Terrific heat of 160 gallons of burning Kerosene has no effect on 
 Hy-Rib Concrete Tank. Size: 5'x 5'x 5', 3 ins. thick. 
 
 2 in. Concrete Slab reinforced with Hy-Rib, 5' y clear Span. 
 Mixture, 1:2:4. Designed for a live load of 112 lbs. per sq. ft. and 
 carrying load of 625 lbs. per sq. ft. Fire and Load Tests con¬ 
 ducted by Howarth Erskine, Ltd., Singapore, Straits Settlements. 
 
 36 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Explanation of Hy-Rib Slab Tables 
 
 Pages 38 and 39 
 
 Upper table gives safe loads carried by slab after the concrete 
 has thoroughly set. Safe loads include weight of slab. In floors 
 and roofs weight of the slab must be deducted from the loads 
 given to determine the safe live load. Lower table is used to deter¬ 
 mine the load Hy-Rib will carry as centering before the concrete 
 has set. 
 
 Example: Given a 6 ft. span to carry a safe live load of 110 lbs. 
 per sq. ft. Use tables on page 38. Opposite 2^4-inch slab rein¬ 
 forced with No. 24 41" Hy-Rib read 152 lbs. load. Deduct from 
 this load 36 lbs. (weight of 2j4-inch slab + l / 2 in. cement plaster 
 underneath), giving safe live load of 116 lbs. 
 
 Lower table, page 38, shows that No. 24 4§" Hy-Rib as center¬ 
 ing will not support the weight of 2 l / 2 inches of wet concrete on 
 6 ft. span, but will carry it on a span as great as 3' 4". Therefore 
 use one temporary line of shoring down the center of the span. 
 This shoring is removed after concrete has set. 
 
 HY-RIB SHtATHING. 
 
 Temporary Supports for HY-RIB as Used in Floors and Roofs— 
 Required Only in Special Cases. See lower table, pages 38 and 39. 
 
 Designing Data for Hy-Rib 
 
 Hy-Rib is manufactured from the highest grade of open hearth 
 
 rolled steel plates, also from Copper Bearing Steel. 
 
 Type of Hy-Rib 
 
 Cross-Sectional Area of Steel per foot of 
 width including side laps (square inches). 
 
 Distance of 
 Center of 
 Gravity 
 from Flat 
 Side 
 
 28 Gauge 
 
 26 Gauge 
 
 24 Gauge 
 
 22 Gauge 
 
 H* Hy-Rib (7-Rib) 
 
 \'A' Hy-Rib (Deep-Rib) 
 
 .137 
 
 .164 
 
 .177 
 
 219 
 
 .236 
 
 .273 
 
 .295 
 
 .33 in. 
 .50 in. 
 
 Weights of Hy-Rib (lbs. per sq. ft.) 
 
 Type of Hy-Rib 
 
 22 Gauge 
 
 24 Gauge 
 
 26 Gauge 
 
 28 Gauge 
 
 \y 2 " Hy-Rib 
 
 1.340 
 
 1.072 
 
 .804 
 
 
 If Hy-Rib 
 
 1.322 
 
 1.057 
 
 .793 
 
 .661 
 
 W Hy-Rib 
 
 
 .793 
 
 .595 
 
 .496 
 
 3/s" Hy-Rib 
 
 
 .635 
 
 .476 
 
 .397 
 
 37 
 
Hy-Rib—A Kahn Building Product 
 
 W Hy-Rib (7-Rib) Tables 
 
 Safe Loads in Pounds per Square Foot for Slabs 
 Reinforced with 15/16" Hy-Rib 
 
 (See also table below) 
 
 (Safe loads include weight of slab.) 
 
 (For safe live loads, deduct weight of slab) 
 
 Thickness of slabs 
 above 
 
 base of sheathing 
 
 Gauge 
 
 No. 
 
 tt' 
 
 Hy-RIb 
 
 Moment 
 ofresist- 
 ance per 
 foot 
 
 of width 
 
 SPAN IN FEET 
 
 3 
 
 4 
 
 5 
 
 6 7 
 
 8 9 
 
 10 
 
 11 
 
 2' thick slab 
 
 28 
 
 3140 
 
 291 
 
 164 
 
 104 
 
 73 
 
 
 
 
 Wt.=24 lbs. 
 
 26 
 
 3770 
 
 348 
 
 196 
 
 125 
 
 87 
 
 
 
 
 per sq. ft. 
 
 24 
 
 5020 
 
 464 
 
 261 
 
 167 
 
 117 
 
 
 
 
 2K" thick slab 
 
 28 
 
 4080 
 
 377 
 
 212 
 
 136 
 
 94 69 
 
 53' 
 
 
 
 Wt.=30 lbs. 
 
 26 
 
 4900 
 
 453 
 
 255 
 
 163 
 
 113 83 
 
 63: 
 
 
 
 per sq. ft. 
 
 24 
 
 6530 
 
 605 
 
 340 
 
 217 
 
 152 111 
 
 851 
 
 
 
 
 22 
 
 8160 
 
 755 
 
 425 
 
 272 
 
 189 139 
 
 106 
 
 
 
 3" thick slab 
 
 28 
 
 5020 
 
 464 
 
 261 
 
 167 
 
 116 85 
 
 65 
 
 
 
 Wt.=36 lbs. 
 
 26 
 
 6020 
 
 558 
 
 314 
 
 200 
 
 140 102 
 
 78 62 
 
 
 
 per sq ft. 
 
 24 
 
 8020 
 
 742 
 
 417 
 
 267 
 
 186 136 
 
 104 82 
 
 
 
 
 22 
 
 10030 
 
 927 
 
 520 
 
 334 
 
 232, 170 
 
 130 103 
 
 
 
 3 l /i’ thick slab 
 
 28 
 
 5960 
 
 551 
 
 310 
 
 198 
 
 138 101 
 
 77 
 
 
 
 Wt.=42 lbs. 
 
 26 
 
 7150 
 
 660 
 
 371 
 
 238 
 
 165 122 
 
 93, 73 
 
 
 
 per sq ft 
 
 24 
 
 9530 
 
 882 
 
 496 
 
 317 
 
 221 162 
 
 124 98 
 
 79 
 
 
 
 22 
 
 11910 
 
 1101 
 
 620 
 
 397 
 
 276 202 
 
 155 122 
 
 99 
 
 
 4" thick slab 
 
 28 
 
 6900 
 
 638 
 
 358 
 
 230 
 
 160 117 
 
 90! 71 
 
 
 
 Wt. =48 lbs. 
 
 26 
 
 8270 
 
 768 
 
 431 
 
 276 
 
 192 140 
 
 108 86 
 
 69 
 
 
 per sq. ft. 
 
 24 
 
 11030 
 
 1020 
 
 572 
 
 367 
 
 256 188 
 
 144 114 
 
 92 
 
 76 
 
 
 22 
 
 13790 
 
 1275 
 
 716 
 
 459 
 
 319 234 
 
 179| 142 
 
 114 
 
 95 
 
 x . i 2 For B. M. = Aw l 2 , add 20% to above loads. 
 
 10 w . p or B. M. = 1 wl 2 , deduct 20% from above loads. 
 
 Maximum Spans for 15/16" Hy-Rib (7-Rib) as Centering 
 
 To support various thicknesses of wet concrete. For greater spans 
 use temporary supports. 
 
 Gauge of _ THIC KNESS OF SLAB 
 
 15/16" 
 
 Hy-Rib 
 
 IK" 
 
 2" 
 
 to 
 
 ! ^ 
 
 m 
 
 3" 
 
 3K" 
 
 4" 
 
 No. 28 
 
 3' 5* 
 
 3' 0* 
 
 2' 8' 
 
 2' 5* 
 
 2' 3' 
 
 2' V 
 
 No. 26 
 
 3' 9’ 
 
 3' y 
 
 2'11' 
 
 2' 8* 
 
 2' 6' 
 
 2' r 
 
 No. 24 
 
 4' r 
 
 3' 9' 
 
 3' r 
 
 3' 1' 
 
 2'10' 
 
 2' 8' 
 
 No. 22 
 
 4'ir 
 
 4' 3' 
 
 y 9" 
 
 3' 5* 
 
 3' 2’ 
 
 3' O' 
 
 38 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 iy 2 " Hy-Rib (Deep-Rib) Tables 
 
 Safe Loads in Pounds per Square Foot for Slabs 
 Reinforced with 1 l At" Hy-Rib 
 
 (See also table below) 
 
 (Safe loads include weight of slab.) 
 
 (For safe live loads, deduct weight of slab) 
 
 Thickness of slabs 
 above 
 
 Gauge 
 
 No. 
 
 Moment 
 of resist- 
 
 SPAN IN FEET 
 
 
 
 
 
 
 
 
 
 
 
 
 
 base of sheathing 
 
 Hy-Rib 
 
 foot 
 
 of width 
 
 3 
 
 4 
 
 5 
 
 6 
 
 7 
 
 8 
 
 9 
 
 10 
 
 11 
 
 12 
 
 13 
 
 2 y 2 " thick slab 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Wt.=30 lbs. 
 
 26 
 
 4870 
 
 451 
 
 254 
 
 162 
 
 113 
 
 83 
 
 63 
 
 
 
 
 
 
 per sq. ft. 
 
 24 
 
 6500 
 
 601 
 
 338 
 
 216 
 
 150 
 
 110 
 
 85 
 
 
 
 
 
 
 3' thick slab 
 
 26 
 
 6090 
 
 563 
 
 317 
 
 203 
 
 141 
 
 104 
 
 79 
 
 63 
 
 
 
 
 
 Wt.=36 lbs. 
 
 24 
 
 8120 
 
 751 
 
 423 
 
 270 
 
 188 
 
 138 
 
 106 
 
 84 
 
 
 
 
 
 per sq. ft. 
 
 22 
 
 10150 
 
 940 
 
 529 
 
 338 
 
 234 
 
 172 
 
 132 
 
 104 
 
 
 
 
 
 3 Yi" thick slab 
 
 26 
 
 7310 
 
 676 
 
 380 
 
 243 
 
 169 
 
 124 
 
 95 
 
 75 
 
 
 
 
 
 Wt. =42 lbs. 
 
 24 
 
 9740 
 
 901 
 
 508 
 
 324 
 
 225 
 
 165 
 
 127 
 
 100 
 
 81 
 
 
 
 
 per sq. ft. 
 
 22 
 
 12180 
 
 1126 
 
 663 
 
 406 
 
 282 
 
 207 
 
 158 
 
 125 
 
 102 
 
 
 
 
 A" thick slab 
 
 26 
 
 8530 
 
 789 
 
 443 
 
 284 
 
 197 
 
 145 
 
 111 
 
 88 
 
 71 
 
 
 
 
 Wt.=48 lbs. 
 
 24 
 
 11370 
 
 1052 
 
 592 
 
 379 
 
 263 
 
 194 
 
 148 
 
 117 
 
 95 
 
 78 
 
 
 
 per sq. ft. 
 
 22 
 
 14210 
 
 1318 
 
 740 
 
 473 
 
 329 
 
 242 
 
 185 
 
 146 
 
 118 
 
 98 
 
 
 
 A}i" thick slab 
 
 26 
 
 9740 
 
 901 
 
 508 
 
 324 
 
 225 
 
 165 
 
 126 
 
 100 
 
 81 
 
 
 
 
 Wt.=54 lbs. 
 
 24 
 
 12990 
 
 1202 
 
 678 
 
 433 
 
 301 
 
 221 
 
 170 
 
 134 
 
 108 
 
 89 
 
 75 
 
 
 per sq. ft. 
 
 22 
 
 16240 
 
 1505 
 
 847 
 
 541 
 
 376 
 
 276 
 
 211 
 
 167 
 
 135 
 
 112 
 
 94 
 
 
 5' thick slab 
 
 26 
 
 10960 
 
 1013 
 
 570 
 
 365 
 
 254 
 
 186 
 
 142 
 
 113 
 
 91 
 
 
 
 
 Wt.=60 lbs. 
 
 24 
 
 14620 
 
 1352 
 
 761 
 
 487 
 
 338 
 
 248 
 
 190 
 
 152 
 
 122 
 
 100 
 
 84 
 
 
 per sq. ft. 
 
 22 
 
 18270 
 
 1688 
 
 950 
 
 609 
 
 422 
 
 310 
 
 237 
 
 187 
 
 152 
 
 126 
 
 106 
 
 90 
 
 5%" thick slab 
 
 26 
 
 12180 
 
 1123 
 
 632 
 
 406 
 
 281 
 
 207 
 
 158 
 
 125 
 
 102 
 
 
 
 
 Wt.=66 lbs — 
 
 - 24 
 
 16240 
 
 1500 
 
 845 
 
 541 
 
 376 
 
 276 
 
 211 
 
 167 
 
 135 
 
 112 
 
 94 
 
 
 per sq. ft. 
 
 22 
 
 20300 
 
 1880 
 
 1058 
 
 676 
 
 470 
 
 345 
 
 264 
 
 209 
 
 169 
 
 140 
 
 118 
 
 100 
 
 j i 2 For B. M. = l'a wl 3 , add 20% to above loads. 
 
 10 W • p or B. M. = s w l 3 , deduct 20% from above loads. 
 
 Maximum Spans for VA” Hy-Rib (Deep-Rib) as Centering 
 
 To support various thicknesses of wet concrete. For greater spans 
 use temporary supports. 
 
 Gauge of THICKNESS OF SLAB 
 
 1 72 . 
 
 Hy-Rib 
 
 2" 
 
 2K" 
 
 3" 
 
 3^" 
 
 4" 
 
 4}£" 
 
 5" 
 
 5'/ 2 ' 
 
 6" 
 
 No. 22 
 
 5' 7" 
 
 5' 0' 
 
 4' 6' 
 
 A ' 2" 
 
 3'11' 
 
 3' 8' 
 
 3' 6' 
 
 3' A" 
 
 3' 2" 
 
 No. 24 
 
 5' 0' 
 
 4' 5" 
 
 4' r 
 
 3' 9" 
 
 3' 6* 
 
 3' A" 
 
 3' 2" 
 
 3' 0' 
 
 2'10* 
 
 No. 26 
 
 4' 4' 
 
 3'10* 
 
 3' 6' 
 
 3' 3" 
 
 3' 0' 
 
 2'10* 
 
 2' 8* 
 
 2' 7' 
 
 2' 6' 
 
 39 
 
Hy-Rib—A Kahn Building Product 
 
 Specifications for Hy-Rib 
 Floors and Roofs 
 
 REINFORCING STEEL. 
 
 Provide Hy-Rib, Type., Gauge.for all floors and roofs. 
 
 Place all Hy-Rib sheets with the lath surface downward. In¬ 
 terlock all adjoining sheets of Hy-Rib at sides and ends. Sheets 
 shall be securely fastened together every 24 inches along the sides 
 and at every rib at the ends by wiring or by clinching- of the 
 lapped ribs with special punch. Where end splices occur between 
 supports, splices in adjacent row r s must be at least two feet apart. 
 Allow a lap of 2 inches where splices occur over supports, other¬ 
 wise 8 inches. 
 
 Hy-Rib shall be rigidly attached to steel framing by means of 
 clips or strong galvanized wire, and to wood framing by staples or 
 nails. These attachments shall be located at the interlocking side 
 splices at least every 12 inches for it" Hy-Rib, and every 14 inches 
 for iy 2 " Hy-Rib. 
 
 Hy-Rib sheets shall be supported as required by lower tables, 
 pages 38 and 39, while concrete is being poured, and, if necessary, 
 temporary supports shall be provided. 
 
 No loads shall be placed on Hy-Rib before concreting and not 
 until the concrete has thoroughly set. Planks for trucking shall 
 be so arranged as to come over supports. 
 
 MATERIALS. 
 
 The materials composing the concrete or plaster shall consist 
 of: 
 
 (a) Portland Cement which has been carefully tested and found 
 
 to satisfactorily meet the requirements of the specifications 
 of the American Society for Testing Materials. 
 
 (b) Sand which is practically free from organic matter and uni¬ 
 
 formly graded in size from coarse to fine. 
 
 (c) Broken stone or gravel which is good, hard, dense stone— 
 
 clean and of such size as to pass through a half-inch ring. 
 
 (d) Hydrated Lime which is uniform in quality and perfectly 
 
 hydrated. 
 
 40 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 APPLICATION. 
 
 Cover the Hy-Rib sheets with a concrete made up as follows: 
 
 Portland Cement .1 part 
 
 Sand.2 parts 
 
 Broken stone .4 parts 
 
 The surface shall be floated smooth to receive a standard roof¬ 
 ing applied as directed by manufacturers. When the concrete has 
 set sufficiently plaster the under side to a thickness of 46 to )4 
 inch with the following mixture: 
 
 Portland Cement . 5 parts 
 
 Sand .12 parts 
 
 Lime Paste . 1 part 
 
 The cement and hydrated lime, after being thoroughly mixed 
 dry to uniform color, shall be added to the dry sand and the whole 
 manipulated until evenly mixed. Add water to secure proper 
 working consistency and sufficient long cow hair to key. The 
 mortar shall be applied within 30 minutes from time of mixing. 
 
 PROTECTION. 
 
 The concrete work shall be thoroughly protected from too rapid 
 drying and the direct rays of the sun by means of damp burlap or 
 canvas, or by sprinkling. The concrete slab must be kept thor¬ 
 ough moist in this way for at least two days after placing. 
 
 EXPANSION RODS. 
 
 Where the width of the building is over 200 feet in a direction 
 at right angles to the main ribs of the Hy-Rib place 7/32 or 54 
 inch round rods, spaced 30 inches apart, on top of the high ribs 
 and at right angles to them. 
 
 Specifications for Arched Floors 
 
 Specifications for arched floors are the same as above except 
 as indicated in following paragraph: 
 
 Where curved sheets of Hy-Rib are used for reinforcement of 
 concrete arches it is not necessary to interlock the sheets along 
 the sides, but side ribs shall be thoroughly wired together. Other¬ 
 wise splice and place Hy-Rib as provided for under Floors and 
 Roofs. 
 
 (See also pages 13 and 21.) 
 
 41 
 
Hy-Rib—A Kahn Building Product 
 
 Warren City Tank & Boiler Works, Warren, Ohio. 
 Side wall of Hy-Rib and Concrete. 
 
 Hy-Rib Concrete Sidings, Mark Manufacturing Co., Evanston, Ill. 
 Note United Steel Sash in walls and monitors. 
 
 42 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Walls and Sidings 
 
 Monolithic concrete walls, costing one-half the price of 
 brick, are built of Hy-Rib plastered with cement. Walls 
 are only 2" thick, and thus add 12 to 20 inches to the floor 
 space on the inside as compared with brick or masonry 
 walls. These walls have great strength and rigidity and are 
 built without forms and stiffening channels. 
 
 Hy-Rib concrete is ideal for sidings and curtain walls of 
 industrial buildings, factories, power plants, warehouses, car 
 barns, etc. Such a wall is much less expensive than other 
 types of permanent construction, and much more economical 
 than old-style corrugated iron, which rusts and requires 
 frequent painting. 
 
 For stucco residences, stores and all types of buildings, 
 Hy-Rib furnishes ideal reinforcement. Occasional posts to 
 carry the weight of the floors are provided, the Hy-Rib is 
 attached directly to them and the cement plaster applied. 
 The extreme stiffness of Hy-Rib permits wide spacing of the 
 supporting members. 
 
 Where hollow walls are desired, an additional inside 
 layer of Hy-Rib is applied, leaving an air space between the 
 vertical faces. On the interior the plaster is applied directly 
 to the face of the Hy-Rib. No furring is necessary, as would 
 be required for the ordinary brick wall. The air space be¬ 
 tween the Hy-Rib sheets makes a building that is easy to 
 heat in winter and one that keeps cool in summer. 
 
 The old style building with wooden sidings can be trans¬ 
 formed into a modern stucco structure, by applying Hy-Rib 
 and plastering with cement—the ribs of Hy-Rib furnish the 
 necessary furring. 
 
 43 
 
Hy-Rib—A Kahn Building Product 
 
 Sunset Publishing Co., San Francisco, Cal. 
 
 Geo. W. Kelhane, Architect. 
 
 The exterior concrete walls are built with Hy-Rib on wood studs. 
 
 Texas State Fair Assoc., Dallas, Tex., Restaurant Row (500'x 44'). 
 Hy-Rib Concrete Walls, Kahn System Reinforced Concrete, 
 United Steel Sash Windows and Doors. 
 
 44 
 
Trussed Concrete Steel Co., Youngstown, O 
 
 Hy-Rib Sidings used in construction of Superstructure and Tower 
 above Bins, Husted Milling Co., Buffalo, N. Y. 
 
 A. E. Baxter & Co., Consulting Engineers. Monarch Engineering 
 Co., Contractors. James G. Davis, Plastering Contractor. 
 
 45 
 
Hy-Rib—A Kahn Building Product 
 
 46 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 47 
 
 Some of the Buildings at our Youngstown Plant. Note Hy-Rib Concrete Roofs and Sidings. 
 United Steel Sash in Side Walls and Monitors. See bird’s-eye view on page 4. 
 
Hy-Rib—A Kahn Building Product 
 
 48 
 
 Hy-Rib Sidings, Favorite Stove & Range Co., Piqua, Ohio. 
 
Trussed Concrete Steel Co., Youngstown, O 
 
 49 
 
 Hy-Rib Sidings and United Steel Sash. Columbus Machine & Tool Co., Columbus, 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Concrete Sidings and Roofs. 
 
 Lake Superior Iron and Chemical Co., Manistique, Mich. 
 
 Holyoke Gas Works, Holyoke, Mass. 
 Isbell-Porter Co., Engineers and Contractors. 
 Hy-Rib Concrete Sidings and United Steel Sash Windows. 
 
 50 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Roofs and Sidings, Gas Producer Building, Open Hearth 
 Dept., Maryland Steel Co., Sparrows Point, Md. 
 
 Hy-Rib Sidings and United Steel Sash for Windows. 
 Quincy Gas, Electric & Heating Co., Quincy, Ill. 
 Smith, Hinchman & Grylls, Archts. 
 
 51 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Sidings, Gas Producer Bldg., Ford Motor Co., Detroit, Mich. 
 
 Hy-Rib Sidings, American Automatic Railway Switch Co., 
 Birmingham, Ala. 
 
 52 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Roofs and Sidings, Glenmore Distillery, Owensboro, Ky. 
 
 Hy-Rib Sidings and Roofs, 
 
 Great Lakes Engineering Works, Ashtabula, O. 
 
 53 
 
Hy-Rib—A Kahn Building Product 
 
 Coach Repair Shop, N. Y., Westchester & Boston R. R., New York. 
 Hy-Rib Concrete Sidings. United Steel Sash for Windows. 
 
 Barry Mfg. Co., Muscatine, la. 
 
 Hy-Rib Concrete Sidings and Roofs. United Steel Windows. 
 
 54 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Siding, Power House, Gainesville, Texas. 
 
 WEARNE BROTHERS LIMITED. 
 
 ESS SSS SSI SSS SSS SSS SSS SBS 
 
 mIm •• n mm n mIjm 
 
 :::. i£ Urn 
 
 MOTOR tNSiNCERS * IMPORTERS • 
 
 Hy-Rib Concrete Walls and Floors for Motor Garage, 
 Lumpur, Federated Malay States. 
 
 55 
 
Hy-Rib—A Kahn Building Product 
 
 Quarantine Hospital Buildings, San Juan, Porto Rico. 
 Built of Hy-Rib Concrete Construction. 
 
 Hy-Rib Residence of Chas. A. Mangold, Oak Cliff, Dallas, Tex. 
 
 56 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Fan House, Birmingham Fuel Co., Birmingham, Ala. 
 
 67 
 
Hy-Rib—A Kahn Building Product 
 
 r^i -f 
 
 gSi 
 
 jm 
 
 
 :«<<<<<<«<«<<<«*? 
 
 
 Plate Clips (Patented) Price, 75c per 100 
 
 These clips are made of spring steel and when driven on to the 
 flange of the steel work, bite into the steel, gripping it like the jaws 
 of a vise. A simple, rigid, and inexpensive method of attaching 
 Hy-Rib to structural steel. Plate Clips should be located at the 
 interlocking side splice between sheets. See Hy-Rib Punch, 
 page 133. 
 
 58 
 
Trussed Concrete Steel Co., Youngstown, O 
 
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 59 
 
Hy-Rib—A Kahn Building Product 
 
 -Beam 
 
 HOLLOW EXTERIOR 
 WALLS BUILT WITH 
 HY-RIB 
 
 As used in connection with re¬ 
 inforced concrete construction. 
 
 Outside ^ cement mortar 
 waterproofed with 7ras-con 
 Ciiaierproofinq Paste 
 (■See Specif >catrons) 
 
 Beam 
 
 Vertical Section. 
 
 , Groove formed 61/ p/aarx) 
 
 ( beue/ed strips in coti/mn 
 \forms before pot/riny concrete \ 
 
 Horizontal Section. 
 
 60 
 
Trussed Concrete Steel Co., Youngstown, O 
 
 - Recesses /or inserf mi/ 
 
 ' l/erfical Ane/le Sfrufs 
 /ormecf bi/ placini/ 
 bfocAs in forms 
 be/ore pounnp concrete 
 
 SOLID 
 EXTERIOR 
 WALLS BUILT 
 WITH HY-RIB 
 
 As used in connection 
 with reinforced con¬ 
 crete construction. 
 
 Plate Clip 
 10 /i'CiC 
 (of each side lap) 
 
 Oufsrc/e cement mortar 
 u/aferproofed unib Trus-con 
 Uiaterproofin,7 Paste 
 (See (Specifications) 
 
 SBCT/O/V 
 at B-B 
 
 Vertical Section. 
 
 Ho £Z Gauae Ttmaae 
 Apple fax /4 
 UfooJen P/ups d/xf/e 
 30" CC. ' ' 
 
 Column 
 
 Horizontal Section. 
 
 61 
 
Hy-Rib—A Kahn Building Product 
 
 Specifications for Hy-Rib 
 Walls and Sidings 
 
 ♦REINFORCING STEEL. 
 
 Provide Hy-Rib, Type ... Gauge .... for all walls and sidings. 
 Interlock all adjoining sheets of Hy-Rib at sides and ends. 
 Sheets shall be securely fastened together every 24 inches along 
 the sides and at every rib at the ends by wiring or by clinching of 
 the lapped ribs with special punch. Where end splices occur 
 between supports, splices in adjacent rows must be at least 2 feet 
 apart. Allow a lap of 2 inches where splices occur over supports, 
 otherwise 8 inches. 
 
 Hy-Rib shall be rigidly attached to steel framing by means of 
 clips or strong galvanized wire, and to wood framing by staples 
 or nails. Such attachments shall be located at the interlocking 
 side splices between sheets and shall occur at least every 16 inches 
 for it" Hy-Rib, and every 12 inches for and Hy-Rib. Place 
 Hy-Rib with the rib side on the outside of the structure. 
 
 MATERIALS. 
 
 The materials composing the plaster shall consist of: 
 
 (a) Portland Cement which has been carefully tested and found 
 
 to satisfactorily meet the requirements of the specifications 
 of the American Society for Testing Materials. 
 
 (b) Sand which is practically free from organic matter and uni¬ 
 
 formly graded in size from coarse to fine. 
 
 (c) Trus-Con Waterproofing Paste, Concentrated, as manufac¬ 
 
 tured by The Trus-Con Laboratories. 
 
 (d) Hydrated Lime which is uniform in quality and perfectly 
 
 hydrated. 
 
 APPLICATION. 
 
 The plaster for the inside wall and for the first coat of outside 
 wall shall be made up as follows: 
 
 Portland Cement . 5 parts 
 
 Sand .12 parts 
 
 Lime Paste . 1 part 
 
 The cement and hydrated lime, after being thoroughly mixed 
 dry to uniform color, shall be added to the dry sand and the whole 
 manipulated until evenly mixed. Add water to secure proper 
 working consistency. The mortar shall then be thoroughly worked 
 until perfectly homogeneous. This composition shall only be made 
 up in lots that can be immediately applied, and any material that 
 has been mixed with water longer than 30 minutes before applying 
 shall be rejected. 
 
 •Wherever it is possible the structure should be so designed that the main 
 ribs of the Hy-Rib will extend horizontally. Where the ribs extend vertically 
 place 7/32 in. or % in. rods 30 int. apart at right angles to the ribs. 
 
 62 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 PLASTERING OF WALLS. 
 
 Apply the first coat of plaster to the ribbed side of Hy-Rib, 
 starting at the bottom of the Hy-Rib wall. Add long cow hair to 
 the specified mixture in order to key the plaster. While this 
 coat is still wet scratch over the surface to form a key for the 
 finish coat which shall be applied after the first coat has set suffi¬ 
 ciently hard to hold it. 
 
 The plaster for the exterior finish coat shall be of the same 
 proportions as scratch coat except that in mixing use water to 
 which Trus-Con Waterproofing Paste, Concentrated, has been 
 added in proportions of 1 part paste to 18 parts water. The thick¬ 
 ness of this waterproofed mortar shall be at least 34 of an inch. 
 Finish coat shall be floated free from any porous imperfections. 
 
 The interior finish shall then consist of composition above speci¬ 
 fied without the addition of waterproofing and shall be troweled 
 to a perfectly smooth finish. Total thickness of finished wall shall 
 be 134 to 2 inches. 
 
 PROTECTION. 
 
 Thoroughly protect the finished work from too rapid drying 
 and the direct rays of the sun by means of damp canvas or sprin¬ 
 kling. The finished work must be kept thoroughly moist in this 
 way for at least two days after plastering. 
 
 EXPANSION RODS. 
 
 In walls and sidings where it is found necessary to run the 
 main ribs of the Hy-Rib vertically, place 7/32 or l /\ inch rods, 
 spaced 30 inches apart, at right angles to the ribs. 
 
 Side Walls Reinforced with Hy-Rib 
 
 (Minimum Requirements) 
 
 (Ribs of Hy-Rib running horizontally) 
 
 Spacing 
 
 of 
 
 Supports 
 
 Thickness 
 
 of 
 
 Wall 
 
 2' 
 
 1)4" 
 
 2' -8* 
 
 1)4" 
 
 3' 
 
 D4" 
 
 6' 
 
 1)4" 
 
 8' 
 
 2" 
 
 10' 
 
 2" 
 
 12' 
 
 2YY 
 
 REINFORCEMENT 
 
 No. 28, Yi" Hy-Rib. 
 
 No. 26, Y%" Hy-Rib. 
 
 No. 28, yf" Hy-Rib, or No. 24, 
 
 No. 26, Hy-Rib, or No. 28, 
 
 No. 24, fjt'” Hy-Rib, or No. 26, 
 
 No. 26, Hy-Rib. 
 
 No. 24, Hy-Rib. 
 
 Ys" Hy-Rib. 
 tF Hy-Rib. 
 if" Hy-Rib. 
 
 Temporary bracing should be used vertically every 5 ft. for 
 f§" Hy-Rib, and 6 ft. for 1§" Hy-Rib. 
 
 63 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Partitions, 15 feet high, Merchants’ Realty Co., Detroit, 
 Mich. Note extreme height without use of studs or supports; 
 also heavy first coat of plaster made possible by key and stiffness 
 of Hy-Rib. 
 
 64 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Partitions 
 
 Partitions of Hy-Rib require no stiffening channels nor 
 expensive wiring, occupy only 2", increase floor space and 
 are fireproof and economical. 
 
 The ribs of Hy-Rib take the place of the steel channels 
 and do away with the expense and labor of wiring lath to 
 them. Owing to the fact that the lath and ribs are a 
 complete unit, made from a single sheet of steel, such parti¬ 
 tions have extraordinary rigidity. 
 
 The construction of a Hy-Rib partition is very simple. 
 Fasten the large sheets of Hy-Rib at floor and ceiling and 
 apply the plaster. Cement, lime or patent plaster may be 
 used. Hy-Rib presents a flat surface to work against, saves 
 labor and material in plaster and provides a perfect key, 
 without dropping of plaster. 
 
 The completed Hy-Rib partition is only 2" thick, as 
 compared with other types occupying 6" to 8". This extra 
 space adds proportionally to the rental and investment value 
 of your building. 
 
 The fireproofness, soundproofness and strength of the 
 Hy-Rib partitions have been repeatedly demonstrated in 
 actual tests. Note tests on pages 36, 66 and 67. 
 
 Where hollow partitions are desired, pressed steel studs 
 are used with Hy-Rib on each of the two faces, as indicated 
 on page 91. An economical solid partition, using Y%" Hy- 
 Rib Lath and Kahn Pressed Steel Channels, is shown on 
 page 90. 
 
 65 
 
Hy-Rib—A Kahn Building Product 
 
 New York Fire Test on Hy-Rib Partition 
 
 Exterior of Partition After Test 
 
 (Compiled from official report of Fire and 
 Water Test made at the Columbia Fire Testing 
 Station, New York City, upon plaster par¬ 
 tition reinforced with Hy-Rib. Test conducted 
 by Ira H. Woolson, E. M., in co-operation 
 with City Building Bureaus.) 
 
 Partitions were of standard size re¬ 
 quired by the Building Specifications, 
 14' 6"x9' 6". No 26 Gauge Hy-Rib 
 was installed in partition; plaster used 
 was Rock Wall put on in two inside 
 and two outside coats, the approxi¬ 
 mate total thickness of partition being 
 two inches. The partition was sub¬ 
 jected to a continuous fire for one 
 hour, at an average temperature of 
 1700 degrees Fahr. A 1J4” stream 
 of water at hydrant pressure was then 
 thrown against it for two and one-half 
 minutes. 
 
 After the application of fire and 
 water, the final maximum deflection 
 in the Hy-Rib partition was only J4", 
 and partition was in excellent condi¬ 
 tion. 
 
 As a result of the above test, No. 28 Gauge Hy-Rib plastered 
 two inches thick for solid partitions, or with two thicknesses of 
 metal for hollow partitions, have been approved for use in the 
 Borough of Manhattan. 
 
 66 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Sound-proofness 
 of Hy-Rib Partitions 
 
 A solid monolithic partition stands in the front rank in 
 resistance to passage of sound. The solidity of the construc¬ 
 tion without joints or interstices affords more effective in¬ 
 sulation than block construction. The following sound test 
 made by a leading testing laboratory in London, England, 
 demonstrates the soundproofness of Hy-Rib Partitions: 
 
 To ascertain the relative resistance to the transmission 
 of sound of three “Telephone” Cabinets. 
 
 Size of cabinets—3 feet x 3 feet x 6 feet 6 inches high. 
 
 Cabinet A. (VV. 2789.) Built with cement and Breeze 
 partition blocks. 3 feet x 12 inches', 2 inches thick, joints 
 made with cement mortar 1-3. 
 
 Cabinet B. (VV. 2790.) Built with piaster partition 
 blocks. 3 feet x 12 inches, 2 inches thick, joints made with 
 cement mortar, 1-3. 
 
 Cabinet C. (VV. 2791.) Built with Hy-Rib Sheet rein¬ 
 forcement (28 gauge) coated each side with cement and sand 
 mortar (1-3), and rendered to a smooth surface inside and 
 out, to a finished thickness of 2 inches. 
 
 Under varied and repeated series of observations we find 
 that the C. Cabinet (Hy-Rib) shows distinctly greater resist¬ 
 ance to the transmission of sound than either A. or B. 
 
 (Signed) DAVID KILKALDY & SON, 
 
 Testing and Experimenting Work, 
 
 99 Southwark St., London, S. E. 
 
 July 22, 1912. 
 
 67 
 
Hy-Rib—A Kahn Building Product 
 
 Two-inch Hy-Rib Partitions after bombardment with shot and 
 shell in Y. M. C. A., Mexico City, February, 1913, illustrating 
 the remarkable resistance of Hy-Rib Construction to 
 severest shocks. Plastering holes at nominal cost are 
 all the repairs necessary. 
 
 68 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy.Rib Partitions and Ceilings, New Monroe Bldg., Norfolk, Va. 
 
 •Vote Grounds for Base Boards and Picture Mold; also Door Bucks set in place 
 for future doors. John Kevan Peebles, Architect. 
 
 Hy-Rib Partition, E. W. Browning Apartment Hotel, New York 
 
 Showing Hy-Rib, scratch coat, second coat and finish plaster coat. 
 
 Fanning Cerra, Inc., Plastering Contractor. Buchman & Fox, Architects. 
 
 09 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Partition, Trussed Concrete Building, Detroit, Mich. 
 Note grounds for base-board and chair rail. 
 
 
 70 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Partition, Y. M. C. A., Portland, Ore. Note the cast 
 cement base as shown in detail on page 73. Also note electric 
 conduits and switch box in Hy-Rib. 
 
 71 
 
Hy-Rib—A Kahn Building Product 
 
 Plastering flat side of Hy-Rib Partition and view from opposite 
 side. Note perfect clinch with no dropping of plaster. 
 
 72 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Partition. Buenos Aires, S. A. 
 
 Note switch box and electric conduit in plastered Hy-Rib. 
 
 >• 
 
 s 
 
 \ 
 
 *• ^rHy-rib 
 
 \ 
 
 \ 
 
 »• 
 
 V 
 
 -Cast Suse 
 in S' Lengths 
 
 Two Methods of Providing Cement Bases for Hy-Rib Partitions. 
 
 Where the cast bases are used as in the Portland Y. M. C. A. on page 
 71 the Hy-Rib sets in groove at top. In the other method the cement finish 
 is plastered to proper thickness on one side of the Hy-Rib. The temporary brac¬ 
 ing strip is then removed and other side finished. Plaster is applied to the 
 Hy-Rib above the base to a total thickness of two inches. 
 
 73 
 
Hy-Rib—A Kahn Building Product 
 
 Polo Grounds, National Baseball League, New York City. 
 Snare & Triest Co., Erectors. 
 
 Hy-Rib used in all Sidings, Partitions, Ticket Booths, Railings, etc. 
 
 National League Baseball Grandstand, Cincinnati, O. 
 Hy-Rib Concrete Partition Walls around boxes, etc. 
 
 74 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Calhoun Bath House, Minneapolis, Minn. Cecil Bayless Chapman, 
 Architect; F. Gottlieb Magney, Associate. 
 
 Panels of Hy-Rib Partitions are handled as a unit. 
 
 Mausoleum, Detroit Crematorium, Detroit, Mich. 
 Partitions, niches, columns and beams are Hy-Rib Concrete. 
 
Hy-Rib—A Kahn Building Product 
 
 SbeeZs secureZu 
 fasZened ZoyeZZer 
 'bu pancb/na 
 Zapped A’/Zs. 
 n/s does azoa// 
 a/i/b a/Z wZr/ny. 
 
 (See BeZa/Z) 
 
 Method of Inter¬ 
 locking and Punch¬ 
 ing Hy-Rih Sheets. 
 (See page 133 for 
 Hy-Rib Punch.) 
 
 L apped and 
 Pressed Zoye/Zer 
 
 °er/ecZZ// 
 
 Zope/ner by panc//hy 
 ca/ZZ //and Pane/. 
 
 Uniting Hy-Rib sheets by punching interlocked ribs. 
 
 76 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Raising Hy-Rib en masse with 2x4 wooden scantling in which 
 spikes are driven as shown below. The ten sheets of Hy-Rib 
 have been previously united by punching the interlocked side 
 r ibs. , 
 
 2x4 Scantling with spikes driven in slantwise. These spikes engage 
 the Hy-Rib mesh permitting a great area of Hy-Rib to be raised 
 or hoisted at one operation, as illustrated above. 
 
 77 
 
Hy-Rib—A Kahn Building Product 
 
 Temporary Tracing J^or ffy-Tib 
 
 „_ Par/-/iron 
 
 Construction 
 
 -Celt mo 
 
 Hy-Rib 
 
 Horizontal Wooden Strips ~S about 5 0 c.c 
 are fastened to f/at side of Hy-fiib and 
 braced by strips "St 
 
 This temporary bracing is 
 removed as soon as first 
 coat of piaster basset. 
 
 Temporary Bracing for Hy-Rib Partition Construction. This brac¬ 
 ing is removed after the first coat of plaster, applied to 
 ribbed side, has set. No other bracing is required. 
 
 78 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Partition—Dodge Bros. Power Building, Detroit Mich. 
 Note simplicity of temporary 
 
 79 
 
Hy-Rib—A Kahn Building Product 
 
 Method of fastening during Method of fastening after 
 
 construction by attaching concrete is poured by drilling 
 beveled strips to forms. holes for wood plugs. 
 
 Screws or 
 nails well 
 clinched 
 
 Nail 
 
 )? , « ?V - i x . * 
 
 Wooden strips-3"w/de 
 for attachment of 
 chair rat/ 
 
 Wooden strips 4 wide 
 for attachment of 
 base-board 
 No 2? gauge tongue angle Nad 
 
 Wooden plugs hx /%' 
 30' cc 
 
 'Beve/ed wooden strip 
 embedded in concrete 
 during construction 
 
 HY-RIB Partitions and Method of Attaching to Reinforced Con¬ 
 crete Construction. 
 
 Drill holes w f/oor and 
 ceiling for the receplion 
 of wooden p/ugs. Nail 
 ZZ qauge tongue angles 
 to same 
 
 No.22 gauge tongue 
 ang/e xNj 
 
 80 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 22 Gauge Tongue Angles 
 For attaching Hy-Rib in parti¬ 
 tions and walls. Length, 5 feet. 
 Supplied in bundles of 25 angles. 
 Spacings of tongues, 7 or 8 inches. 
 
 Rib Clips 
 
 For attaching top of Hy- 
 Rib partition to steel beam. 
 See also Rib Clips, page 99. 
 
 Application of 22 Gauge Tongue Angle at Bottom of Partitions 
 
 and Walls. 
 
 Details for application at top and sides are similar. 
 
 81 
 
Hy-Rib—A Kahn Building Product 
 
 Sketch showing 
 method of erecting 
 tig-R/b partition in 
 connect/on with 
 Hollow 77/e f/oors 
 
 Sketch showing 
 method of erecting 
 tig-Rib partition in 
 connection with 
 wood joists 
 
 Sketch showing 
 method of erect/ng 
 tig- Rib partitions 
 in connection with 
 suspended cei/mgs. 
 
 tvood 
 shops 
 Screws or nails 
 well clinched- 
 
 tig-Rib - 
 
 tig-R/h 
 
 Grounds for fastening 
 ho.c 
 
 ,.£? G a. Tongue ^ o22 .^7^ </e 
 ~ Angle * Hng/ej xj - 
 
 m 
 
 
 Jl . 
 }l." 
 
 Jr 
 
 'i 
 
 
 *- 
 
 
 
 
 
 
 
 
 / d <3 
 
 1 ^ 
 
 <7 
 
 a < 
 
 r 8 
 
 d 
 
 ifp 
 
 ° "d 
 
 
 
 o ■■yt-pf 
 
 
 
 o 
 
 f'.<3g c 
 
 
 Grounds for 
 
 fastening 
 
 baseboard 
 
 Screws or nails 
 we/tc/inched 
 
 *noi/ 
 
 h±t±rl-f 
 
 
 
 
 <4 
 
 < 
 
 d c 
 
 a o 
 
 >■ ' < C 
 .O' 3 
 
 & c 
 
 0 
 
 0 
 
 q - > 
 
 <3 <a) 
 
 
 
 
 & V o • 
 
 
 Two methods op fastening tig-R/h Partition to wooden f/oors 
 
 Method of Attaching Hy-Rib Partitions at Ceiling 
 
 and Floor. 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy Rit? 
 
 ■ Place Pit) La th 
 dor^ontaly 
 over l'V2"s front 
 and bach for 
 p la stertng 
 
 — 2 V ? is cut. to 
 l"* 2 M above door 
 opening anct rur\$ 
 to ceiling 
 
 -Detail of Vertical- 
 -^tuds in Door Frane- 
 
 Kib-Lath- 
 on front ^ 
 and bacKp 
 |"k2" 
 
 -Elevation of Door- 
 
 • DETAILS Of VIIiDOV- -DETAILS Of DOOK" 
 
 -fKAMinq- -TFAMmq- 
 
 ■rtfAninq details or z** hy-kib walls & PAKTrrions. - 
 
 Methods of Building Wooden Door and Window Frames into 
 Hy-Rib Partitions or Walls. 
 
 83 
 
Hy-Rib—A Kahn Building Product 
 
 Cross Section at D-D 
 with Wood Trim 
 
 Cross Section at D-D 
 with Metal Trim 
 
 Fireproof Door Frame in Hy-Rib Partitions 
 
 The frame is entirely of steel, eliminating all wood work and 
 leaving absolutely nothing that can burn in the partition. The 
 steel channel may be tapped, punched or drilled to attach wood or 
 metal trim, door stops, hinges, locks, etc. Our Pressed Steel 
 Channel Sections can he used to advantage in building up this 
 frame work. 
 
 84 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Specifications for Solid 
 Hy-Rib Partitions 
 
 Provide Hy-Rib, Type ..... Gauge .for all solid partitions. 
 
 Interlock all adjoining sheets of Hy-Rib at sides and ends. Sheets 
 shall be securely fastened together every 24 inches along the sides 
 and at every rib at the ends by wiring or by clinching of the lapped 
 ribs with special punch. Where sheets are spliced at the ends, 
 splices in adjacent rows must be at least 2 feet apart, and must lap 
 from 3 to 6 inches depending upon the height of the partition. 
 
 Hy-Rib shall be attached to floors and ceilings by means of 
 small angles (or channels, or wooden strips) as indicated in details. 
 
 Where cement plaster is used provide 7/32 or inch rods, 
 spaced 30 inches on center, at right angles to the ribs. Where 
 lime or patented plasters are used, rods are unnecessary. 
 
 rf-- ? 
 
 Partitions Reinforced with Hy-Rib 
 
 (Minimum Requirements.) 
 
 (Ribs of Hy-Rib running vertically.) 
 
 Height 
 
 of 
 
 Partitions 
 
 Thickness 
 
 of 
 
 Partitions 
 
 up to 
 
 10 feet 
 
 IX’ 
 
 12 feet 
 
 2' 
 
 14 feet 
 
 2X' 
 
 16 feet 
 
 
 18-feet 
 
 2 X’ 
 
 20 feet 
 
 3' 
 
 reinforcement 
 
 No. 28, ff' Hy-Rib. 
 
 No. 26, W Hy-Rib, or No. 28, if' Hy-Rib. 
 No. 24, if' Hy-Rib, or No. 26, if' Hy-Rib. 
 No. 26, if' Hy-Rib. 
 
 No. 24, if' Hy-Rib. 
 
 No. 22, if' Hy-Rib. 
 
 Temporary bracing should be used horizontally every 5 ft. for 
 it" Hy-Rib and 6 ft. for if" Hy-Rib. 
 
 For partitions above 25 feet high, structural supports should be 
 erected vertically in accordance with Side Wall Table, page 63, and 
 the Hy-Rib run horizontally. Also in special cases partitions 
 above 12 ft. which will be subjected to constant vibration, such as 
 in factories, may have to be constructed in the same manner. 
 
 86 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Lath throughout interior for partitions and ceilings, 
 Plaza Hotel, Dallas, Texas. 
 
 Guidera & Bell, Owners, Architects and Contractors. 
 
 86 
 
Trussed Concrete Steel Co., Youngstown, Ohio 
 
 Kahn Pressed Steel Studs 
 
 Kahn Pressed Steel Channels without Prongs, furnished in 
 sizes indicated below, are extensively used in solid partitions, ceil¬ 
 ings, furring, etc. 
 
 Kahn Pressed Steel Studs with Prongs, furnished in various 
 shapes and sizes as indicated on pages 88 and 89, are used in walls, 
 partitions, furring, ceilings, etc. 
 
 Kahn Pressed Steel Hollow Studs shown below are formed of 
 two Y" pressed steel channels held rigidly together by spacing 
 clips. We can supply the Hollow Studs assembled, but spacing 
 clips can be readily attached to the channels on the job. Kahn 
 Hollow Studs are very rigid, yet are open so as to permit rapid 
 wiring of the Hy-Rib or Rib Lath, and allow passage 
 of conduits in all directions. 
 
 I 
 
 
 | 
 
 
 Kahn 
 
 Pressed 
 
 Steel 
 
 Channels. 
 
 Kahn Pressed Steel Channels without Prongs 
 No. 16 Gauge 
 
 SIZE 
 
 w 
 
 V 
 
 IX' 
 
 2" 
 
 Weight in lbs. 
 per lineal foot 
 
 .276 
 
 .332 
 
 .442 
 
 .553 
 
 Stock lengths—12, 14, 16, 18 and 20 feet. 
 Shipped in bundles of 25 channels. 
 
 Spacing Clip as furnished for building up 
 Kahn Hollow Studs on the job. . 
 
 Standard Widths—Outside dimensions, 2 in., 
 3 in. and 4 in. Other widths can be furnished 
 on special order. 
 
 Kahn Hollow Studs are also furnished com¬ 
 pletely assembled by our factory. 
 
 87 
 
 Kahn Hollow Studs 
 as used in hollow 
 partitions. 
 
 Made of two H inch 
 pressed steel channel* 
 united by spacing bars. 
 
Hy-Rib—A Kahn Building Product 
 
 Kahn Pressed Steel Studs with Prongs 
 
 88 
 
Trussed Concrete Steel Co., Youngstown, Ohio 
 
 KAHN PRESSED STEEL CHANNEL STUDS WITH OR WITHOUT PRONGS. 
 
 Section 
 
 Index 
 
 Height 
 
 inches 
 
 Width 
 
 of 
 
 Flange 
 
 inches 
 
 Weight 
 
 per 
 
 lin. foot 
 lbs. 
 
 Thickness of Flange 
 and Web, inches 
 
 Decimal 
 
 Fractional 
 
 C-62 
 
 IB 
 
 6 
 
 2 
 
 2.19 
 
 .0625 
 
 iV 
 
 
 14 
 
 
 
 2.74 
 
 .078125 
 
 A 
 
 C-52 
 
 16 
 
 5 
 
 2 
 
 1.98 
 
 .0625 
 
 1*5 
 
 
 14 
 
 
 
 2.48 
 
 .078125 
 
 A 
 
 C-4144 
 
 16 
 
 4 
 
 i>4 
 
 1.5b 
 
 .0625 
 
 A 
 
 
 14 
 
 
 
 1 .95 
 
 .078125 
 
 A 
 
 C-3144 
 
 16 
 
 3 
 
 1 i j 
 
 1.35 
 
 .0625 
 
 I 1 i 
 
 
 14 
 
 
 
 1.69 
 
 .078125 
 
 A 
 
 C-21 
 
 16 
 
 
 1 0.78 
 
 . 0625 
 
 1*8 
 
 KAHN PRESSED STEEL H STUDS WITH OR WITHOUT PRONGS. 
 
 Section 
 
 Index 
 
 Depth 
 
 of 
 
 Beam 
 
 inches 
 
 Width 
 
 of 
 
 Flange 
 
 inches 
 
 Weight 
 
 per 
 
 foot 
 
 lbs 
 
 Thickness of Flange 
 
 (f) 
 
 Thickness of Web 
 (w) 
 
 Decimal 
 
 F ractional 
 
 Decimal 
 
 Fractional 
 
 B-64 16 
 
 6 
 
 3 
 
 4.4 
 
 .0625 
 
 A 
 
 . 1250 
 
 a 
 
 14 
 
 
 
 5.5 
 
 .078125 
 
 
 .15625 
 
 
 B-54 16 
 
 5 
 
 4 
 
 4.0 
 
 .UbZo 
 
 1*5 
 
 . 1250 
 
 A 
 
 14 
 
 
 
 5.0 
 
 .078125 
 
 A 
 
 .15625 
 
 A 
 
 B-43 16 
 
 4 
 
 3 
 
 3.1 
 
 .0625 
 
 
 .1250 
 
 A 
 
 14 
 
 
 
 3.9 
 
 .078125 
 
 A- 
 
 .15625 
 
 A 
 
 B-33 16 
 
 3 
 
 3 
 
 2.7 
 
 .0625 
 
 A 
 
 . 1250 
 
 A 
 
 14 
 
 
 
 3.4 
 
 .078125 
 
 A 
 
 .15625 
 
 ■fo 
 
 KAHN PRESSED STEEL CAP AND SILL CHANNELS. 
 
 Section 
 
 Index 
 
 Height 
 
 inches 
 
 Width of 
 Flange 
 inches 
 
 Wt. per 
 Lin. Foot 
 pounds 
 
 Thickness of Flange 
 and Web, inches 
 
 Decimal 
 
 Fraction 
 
 P-62J4 
 
 14 
 
 6 A 
 
 244 
 
 2.83 
 
 .078 
 
 
 
 11 
 
 614 
 
 
 4.58 
 
 .125 
 
 A 
 
 P-62 
 
 14 
 
 6A 
 
 2 
 
 2.58 
 
 .078 
 
 
 
 11 
 
 644 
 
 
 4.17 
 
 .125 
 
 A 
 
 P-6114 
 
 14 
 
 6 A 
 
 144 
 
 2.32 
 
 .078 
 
 
 
 11 
 
 644 
 
 
 3.75 
 
 .125 
 
 
 P-61 
 
 16 
 
 6 A 
 
 1 
 
 1.64 
 
 .062 
 
 TS 
 
 P-5214 
 
 14 
 
 5 A 
 
 244 
 
 2.58 
 
 .078 
 
 _5_ 
 
 
 11 
 
 544 
 
 
 4.17 
 
 .125 
 
 A 
 
 P-52 
 
 14 
 
 5-h 
 
 2 
 
 2.32 
 
 . .078 
 
 
 
 11 
 
 544 
 
 
 3.75 
 
 .125 
 
 
 P-5114 
 
 14 
 
 &T2 
 
 144 
 
 2.05 
 
 .078 
 
 
 
 11 
 
 544 
 
 
 3.34 
 
 .125 
 
 A 
 
 P-51 
 
 16 
 
 544 
 
 1 
 
 1.43 
 
 .062 
 
 -h 
 
 P-4214 
 
 14 
 
 
 2K 
 
 2.32 
 
 .078 
 
 
 
 11 
 
 444 
 
 
 3.75 
 
 .125 
 
 
 P-42 
 
 14 
 
 4 A 
 
 2 
 
 2.05 
 
 .078 
 
 
 
 11 
 
 444 
 
 
 3.34 
 
 .125 
 
 V* 
 
 P-4114 
 
 14 
 
 4 T2 
 
 134 
 
 1.79 
 
 .078 
 
 
 
 11 
 
 444 
 
 
 2.92 
 
 .125 
 
 
 P-41 
 
 16 
 
 454 
 
 1 
 
 1.22 
 
 .062 
 
 lS 
 
 P-3212 
 
 14 
 
 3A 
 
 2 44 
 
 2.05 
 
 .078 
 
 
 
 11 
 
 344 
 
 
 3.34 
 
 .125 
 
 A 
 
 P-32 
 
 14 
 
 3 A 
 
 2 
 
 1.79 
 
 .078 
 
 
 
 11 
 
 344 
 
 
 2.92 
 
 .125 
 
 
 P-3114 
 
 14 
 
 3 A 
 
 144 
 
 1.53 
 
 .078 
 
 
 
 11 
 
 344 
 
 
 2.50 
 
 .125 
 
 A 
 
 P-31 
 
 16 
 
 344 
 
 1 
 
 1.02 
 
 .062 
 
 
 P-21 
 
 16 
 
 254 
 
 1 
 
 .81 
 
 .062 
 
 1 h 
 
Hy-Rib—A Kahn Building Product 
 
 Solid partitions 
 with 
 
 Hy-Rib Lath 
 and widely 
 spaced studs. 
 
 Most Economical Construction for Partitions and Ceilings 
 Hy-Rib Lath and Widely Spaced Studs 
 
 In this money-saving construction, the channels are spaced 
 24" to 36" centers instead of 12" to 16", required with ordinary 
 metal laths, thus saving one-half the cost of channels, labor and 
 wiring. 
 
 In partitions, ceilings and furring, the use of Hy-Rib Lath 
 with widely spaced pressed steel channels is exceptionally eco¬ 
 nomical, at the same time providing strength, permanence and fire¬ 
 proofness. Two-coat plaster work is accomplished instead of three. 
 
 M' Hy-Rib 
 Lath 
 
 Maximum stud spacing for 
 walls and partitions 
 
 Maximum spacing of supports 
 for ceilings 
 
 24 gauge 
 
 36' 
 
 33' 
 
 26 gauge 
 
 32' 
 
 30' 
 
 28 gauge 
 
 24' 
 
 22' 
 
 90 
 
Trussed Concrete Steel Co., Youngstown, Ohio 
 
 KAHN 9 
 Pressed Steel 
 Hollow Stud 
 
 
 
 
 -T.crrn 
 
 
 -- WmisSs 
 
 [441^ 
 
 ■ 
 
 T- ■ 
 
 
 ^rrrn 
 
 ■rrrrr!. 
 
 
 STUD EXTENSION 
 
 (FURNISHED IF DESIRED) 
 
 Hollow partitions with YY HY-RIB Lath and widely spaced studs. 
 
 Hollow Fireproof Partitions with " Hy-Rib Lath 
 and Widely Spaced Studs 
 
 The use of the YY Hy-Rib Lath in hollow partitions assures 
 the same economy as in solid partitions. By its use fully half of 
 the studs are saved, with a corresponding saving in wiring and 
 labor. The excellence of the key and the rigidity of the Hy-Rib 
 
 saves labor and material 
 in plastering. 
 
 Only two coats of plas¬ 
 ter are required on Yb" 
 Hy-Rib Lath, where light¬ 
 er laths require three, thus 
 saving time and labor. 
 
 H' Hy-Rib 
 
 Maximum stud spacing for 
 
 Lath 
 
 walls and partitions 
 
 24 gauge 
 
 36" 
 
 26 gauge 
 
 32" 
 
 28 gauge 
 
 24" 
 
 91 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Ceilings, Bremer Arcade Building, St. Paul, Minn. 
 Buechner & Orth, Architects. Wm. Poppenberger & Sons, Plas¬ 
 tering Contractors. 
 
 Note method of suspending Hy-Rib from reinforced hollow 
 tile floors and heavy first coat of plaster made possible 
 by stiffness, key and true surface of Hy-Rib. 
 
 92 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Ceilings, High School, Alliance, O. 
 
 Richards, McCarty & Bulford, Archts. 
 
 Ceilings 
 
 The numerous small stiffening channels and expense of 
 wiring lath to them are eliminated in Hy-Rib ceilings, re¬ 
 ducing labor cost by 50% and saving time in erection. 
 
 The ribs give exceptional stiffness and rigidity to the 
 Hy-Rib, holding it straight and true to line. Hy-Rib pre¬ 
 sents a perfect, flat surface for plastering, requiring a mini¬ 
 mum amount of material. The improved form of expansion 
 provides a perfect key for the plaster and prevents its drop¬ 
 ping off. Two coat work instead of three can be done on 
 Hy-Rib, saving material and labor. 
 
 Continuous lines of supports for the Hy-Rib sheets are 
 placed from two to five feet apart. These supports may be 
 in the construction itself, as in the case of the ceiling at¬ 
 tached to the under side of steel beams; or lines of channels 
 may be suspended from the construction above. 
 
 Due to the great strength of Hy-Rib, a very rigid sur¬ 
 face for plastering is secured, which will not sag under 
 the weight of the plaster nor yield to the pressure of the 
 trowel. 
 
 93 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Lath Ceiling—Hutchinson High School, Buffalo, N. Y. 
 
 H. Osgood Holland, Architect. James G. Davis, Plastering and Lathing Contractor. 
 Note perfect surface for plastering and wide spacing of supports. 
 
 No. 26, Y&" Hy-Rib on 1" Kahn Steel Channels, 30" Centers. 
 Crown Building, Cleveland, Ohio. 
 
 Forest City Engineering Co., Architects and Engineers. 
 
 Masters & Mullen Company, General Contractors. 
 
 94 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hill Memorial Hall, University of Michigan, Ann Arbor, Mich. 
 Albert Kahn, Architect; Ernest Wilby, Associate. 
 
 Hy-Rib and Rib Lath Ceilings, also Hy-Rib Roof and 
 Balcony Floor. 
 
 95 
 
Hy-Rib—A Kahn Building Product 
 
 Note wide spacing of Channel Supports ready for Hy-Rib. 
 
 Hy-Rib Ceiling, Hotel Tuller, Detroit, Mich. 
 
 Note heavy scratch coat, made possible by extreme stiffness of 
 
 Hy-Rib. 
 
 96 
 
Trussed Concrete Steel Co., Youngstown, O 
 
 Hy-Rib Ceilings, Mount St. Joseph Academy, Buffalo, N. Y. 
 A. A. Post, Architect. 
 
 Hy-Rib Suspended Ceiling. 
 Interstate Telephone Co., St. Paul, Minn. 
 
 97 
 
Hy-Rib—A Kahn Building Product 
 
 Germantown High School, Germantown, Philadelphia, Pa. 
 Suspended Ceilings of Hy-Rib. 
 
 J. Horace Cook, Architect; Thomas Reilly, Contractor. 
 
 34" Hy-Rib Lath for Ceilings. Garden Court Apartments, Detroit. 
 Albert Kahn, Architect; Ernest Wilby, Associate. 
 
 98 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 UT S 'F'f rf rFS r? 
 
 TRib Clip 
 
 3*— Hy*Rib 
 
 RIB-CLIP to support HY-RIB in Suspended Ceilings. 
 
 Rib Clips—Price, $1.00 per 100. 
 
 Rib Clips are shipped with one end bent and other end 
 straight as shown by dotted lines. In ordering Rib Clips, 
 always give width of flange upon which clips are to be 
 used, or, if this is impossible, give size and weight of Chan¬ 
 nel or I beam to which the clips are to be attached. 
 
 Rib Clips are particularly useful for supporting ceilings 
 as shown above. For use in partitions, see page 81. 
 
 For walls, sidings and roofs, Plate Clips (see page 58) 
 are simpler, better and more economical. 
 
 99 
 
Hy-Rib—A Kahn Building Product 
 
 Suspended ceiling of Kahn Pressed Steel Chanels and Hy-Rib Lath 
 
 Vi 
 
 Y-t?'.' 
 
 S 
 
 l 'Hahn pressed 
 steel channels 
 
 tfg-ritd 
 
 t> \ 
 
 - No. 7 wire Stampers 
 
 J- 0 " CC along channel 
 or flat 
 
 .LLlire every /ugh rib ofJfg-rih 
 to every channel (orflat) ~ 
 with No 14 wire. 
 
 fax/ flats 
 S-0" c.c. along ~ 
 Channel (orflab) 
 
 'Kahn pressed s/eel 
 channel 
 
 Jfy-rib 
 
 design Nod design No 2 
 
 Sketch showing method of erecting Ny-rih for suspended c&i lings 
 in connection with concrete slabs 
 
 Bolt or a/ire 
 flats together 
 
 2 Kahn pressed steel 
 channels 
 
 showing method of erecting 
 for suspended ceilings in 
 connedTion wifh tile slabs 
 
 
 
 
 
 l ^ 
 
 Toggle Bol 
 
 t 
 
 Tile ] 
 
 . .-a 
 
 '4 x/’flats _ ^ 
 S-o’cc along channel 
 
 2 "Kahn pressed steel 
 channels - 
 
 Inse 
 m ro 
 m til 
 hook 
 
 rt toggle boK 
 vnd hote cut 
 e and bolt on 
 ed flat 
 
 ^Hy-Rib 
 
 Sketch showing method of erecting Nyfib 
 for suspended ceilings in connection with, 
 t/le slab floors already completed. 
 
 HY-RIB Ceilings Suspended from Solid Concrete and 
 Hollow Tile Floors. 
 
 If spans are increased, or a live load is placed upon ceiling, ma¬ 
 terials of a larger size than those here specified must be used. 
 
 100 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 
 ( * ^ 
 l ^ 
 
 ) A 
 
 if. . O 
 
 ,» ■' : O | 
 
 . .\ Jd __J 
 
 ✓ d—' 
 
 f/y-riib | 
 
 t -- ” -y ' • ‘ 'f. a 
 
 ■J . ‘i) 
 
 ° 0 lil ' l 
 
 pans ion bolls 5-0" cc 
 \ a tong channel. 
 
 io euerg channel lorfla/J 
 
 in No ----- 
 
 U/i, 
 
 i M unre.- 
 
 JPesrgn JYo l 
 
 5-0' 
 
 *1 
 
 for longer spans of arch use heaurer channels or 
 Hesifn do Z fla/s ui/lh same spacing 
 
 <5 he he/} showing me/fods oferec/mg l/g-rih fir suspended 
 ceilings in conneclion wrih arched s off i/s of floors 
 u/hen s upp or ling floor is already comple/ea. 
 
 If spans are increased, or a lice load is pfaced upon ceding, 
 ma/er/als of a larger size than here spec fled masi he used. 
 
 Specifications 
 for Suspended Ceilings 
 
 Suspended ceilings shall be built of Hy-Rib attached to lines of 
 supports, as indicated in detail; supports to be Kahn Pressed Steel 
 Channels, with following spacing and Hy-Rib: 
 
 Spacing of Supports 
 
 REINFORCEMENT 
 
 1'- 10' 
 
 No. 28, H’ Hy-Rib. 
 
 2'- 6' 
 
 No. 26, f Hy-Rib. 
 
 2'- 9' 
 
 No. 24. W Hy-Rib. 
 
 2'-11' 
 
 No. 28, if' Hy-Rib. 
 
 3'- 11' 
 
 No. 26, H ’ Hy-Rib or No. 28. 11 ' Hy-Rib. 
 
 4'-11' 
 
 No. 24. 11' Hy-Rib or No 26, ft' Hy-Rib. 
 
 5'-11' 
 
 No. 24. ft' Hy-Rib. 
 
 Each high rib of Hy-Rib shall be attached at each support. 
 
 Place Hy-Rib with the flat side downward. Interlock all ad¬ 
 joining sheets of Hy-Rib at sides and ends. Sheets shall be secure¬ 
 ly fastened together every 24 inches along the sides and at every 
 rib at the ends by wiring or by clinching of the lapped ribs with 
 special punch. Where end splices occur between supports, splices 
 in adjacent rows must be at least 2 feet apart. Allow a lap of 2 
 inches where splices occur over supports, otherwise 8 inches. 
 
 101 
 
Hy-Rib—A Kahn Building Product 
 
 Furring 
 
 All furring strips are eliminated by the use of Hy-Rib. 
 For furring inside or outside of walls, Hy-Rib is nailed or 
 stapled directly to the wall with the lath side outward, 
 eliminating entirely the expense of attaching lath to furring 
 strips. Two coats of plaster instead of three can be applied 
 to the Hy-Rib, saving labor and plaster. 
 
 Where an air space is necessary for insulation against 
 dampness and temperature, either or 1 ^ 2 " Hy-Rib 
 
 should be used, securing in this way an air space of either 
 
 or V/z" as desired. Where the furring is only desired 
 as a key for the plaster, Hy-Rib Lath is entirely ample. 
 
 Hy-Rib is extensively used as a furring for insulation 
 around boilers, in cold storage plants, and on roofs to pre¬ 
 vent condensation. The air space between the ribs stops the 
 conduction of heat, cold and moisture. 
 
 102 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Specifications for Furring 
 
 Hy-Rib shall be placed with the lath side away from wall. It 
 shall be fastened to the wall by means of staples or nails occurring 
 every 36 inches along the length of each high rib, points of fasten¬ 
 ing being staggered in adjacent rows. Interlock all sheets at ends 
 and sides and allow 1 inch end lap. 
 
 Alt Heidelberg, Fort Wayne, Ind. J. M. E. Reidel, Architect. 
 Stucco on Hy-Rib used as Furring on Brick Wall. 
 
 103 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Concrete Residence—Dr. Terriberry, Fisher's Island. N. Y. 
 James Sweeney, Architect. 
 
 Hy-Rib Residence for Miss Alice Henck, Santa Barbara, Cal. 
 Thomas Nixon, Architect. 
 
 104 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Industrial Buildings 
 
 in Factories, Warehouses, Foundries, Machine Shops, 
 Rolling Mills, Car Barns, Round Houses, Power Plants, 
 Elevators—in fact, industrial buildings of all kinds, Hy-Rib 
 is used extensively for sidings, floors and roofs. The cement 
 finish gives a good, clean-cut, business-like appearance to 
 the building. The total absence of expense for repairs 
 makes it far more economical than the old style corrugated 
 iron sheets or wooden sheathing. 
 
 Business Buildings 
 
 In Office, Store and Public Buildings, Hy-Rib finds its 
 principal uses in partition, ceiling, floor and roof construc¬ 
 tion. Thin solid partitions less than 2 inches in thickness 
 and of great rigidity are obtained by using Hy-Rib. The 
 size of offices is increased from 4 to 6 inches by the small 
 space- occupied by these thin partitions. Such partitions 
 are strictly fireproof and in this way buildings can be sub¬ 
 divided into fireproof compartments, which prevent the 
 spread of fire. 
 
 Partitions built of Hy-Rib, besides possessing greatest 
 strength, are the lowest in cost of any strictly fireproof 
 method of building and are built more rapidly and with 
 less labor. 
 
 Residences, Garages and 
 Small Buildings 
 
 The advantages of using Hy-Rib and Rib Lath in resi¬ 
 dences and small buildings are: 
 
 1. Practically fireproof, due to the heat-resisting qual¬ 
 ities of the two-inch reinforced concrete slab on outside. 
 
 2. Absolutely waterproof and dampproof. 
 
 3. Easy to heat in winter and keep cool in summer, 
 owing to the double air space in the wall. 
 
 4. Practically indestructible, owing to the permanence 
 of the reinforced concrete wall. 
 
 5. No expense for maintenance, such as painting, re¬ 
 pairs, etc. 
 
 6. Unusual architectural beauty, because of the artistic 
 effects that can be secured with stucco. 
 
 7. Low first cost. 
 
 105 
 
Hy-Rib—A Kahn Building Product 
 
 Vertical Section Through 
 Window. 
 
 Details of 
 Exterior Walls 
 of Residences 
 
 Showing Hy-Rib on outside 
 and Rib Lath on inside. 
 
 Outside Door. 
 
 Horizontal Section Through Outside Door. 
 106 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 The building of concrete residences and smaller build¬ 
 ings has long been popular, owing to their permanence, fire¬ 
 proofness, and unusual possibilities for artistic treatment. 
 The cost has been the one item which has hindered a more 
 universal adoption of this type of building. 
 
 The cost of lumber, field labor, and special contrivances 
 necessary to carry on the ordinary type of concrete con¬ 
 struction makes such work expensive in small buildings. 
 Hy-Rib does away entirely with all forms and special work, 
 greatly reducing the cost. 
 
 For small buildings such as garages, sheds, barns, etc., 
 a single thickness wall of Hy-Rib plastered with cement 
 is ample. To carry the lloor and roof loads provide occa¬ 
 sional posts built up of steel members, wooden scantling, 
 or reinforced concrete. Hy-Rib is attached rigidly to the 
 posts by means of Hy-Rib clips, wires, or staples. 
 
 For dwelling houses an air space should be provided in 
 the outside wall. The following method for constructing 
 stucco walls, will give by far the best results, although the 
 other methods outlined are satisfactory: 
 
 Inside 
 
 16" to£4" 
 
 furring Strip 
 
 
 
 ■Interior finish 
 Ft,'as ter 
 ^p^Rblath 
 -Air Space 
 Jfuitding Hiper 
 
 hint Wood under cement mortar 
 With Creosote or asphalt paint 
 
 Outside 
 
 Ay Fib fastened to studs by 
 Staples oyer each Fib 
 
 Air Space 
 eid'ftud 
 
 Cem ent At or tar 
 Ay Fib 
 
 yd finish Coat of 
 Wa terproofed 
 Cem entF/aster 
 
 Cross-Section showing Construction of Exterior Walls. 
 
 Set up an ordinary “balloon” frame structure with 2x4 
 studding spaced 16 to 24 inches apart, and put all tem¬ 
 porary bracing on the inside. Fasten Hy-Rib at each rib 
 to outside of studs with staples or nails. Use or 
 Hy-Rib with ribs extending horizontally and lath surface 
 
 107 
 
Hy-Rib—A Kahn Building Product 
 
 Various stages in overcoating frame building, showing ¥%" 
 Hy-Rib Lath before plastering, after one plaster coat and finished 
 stucco. No furring required for Hy-Rib Lath. 
 
 Residence of N. J. Spaulding, Ionia, Mich. 
 
 An Old Wooden House Transformed into a Modern, Permanent 
 Residence by Overcoating with Hy-Rib and Stucco. 
 
 108 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 against studs. Interlock sheets at sides and ends, securely 
 wiring or clinching them at sides and ends. Paint the 
 studs with creosote or asphalt paint along the entire outer 
 face, and at least an inch back on the sides. Plaster this 
 Hy-Rib on the outside with cement mortar (mixed and ap¬ 
 plied as directed on page 62) to a thickness of \ x / 2 inches for 
 Hy-Rib, or 1 inch for Hy-Rib Lath. The surface 
 can be given any finish desired. The last coat of plaster 
 finish should be waterproofed with Trus-Con Waterproof¬ 
 ing Paste, Concentrated. Then back plaster the Hy-Rib 
 with similar mortar to a thickness of about half an inch. 
 
 This construction insures absolute protection for the 
 steel, and when the mortar has set you have a 2-inch rein¬ 
 forced concrete slab, solid as rock, and much stronger and 
 more rigid than the ordinary matched sheathing and lap 
 siding of which it has taken the place. 
 
 On the inside of the studding tack thin asbestos board 
 or a very heavy tarred paper, then %-inch furring strips, 
 and Rib Lath, on which apply -Hrinch of cement mortar or 
 good plaster (free from pure gypsum) and the regular finish 
 coat. 
 
 The method outlined above gives a monolithic rein¬ 
 forced concrete wall of extreme strength and rigidity. For 
 large buildings Hy-Rib should be used, making wall at 
 least 2" thick. For medium sized buildings, use yi" Hy- 
 Rib Lath, making wall at least lp-." thick. For cottages and 
 buildings in which the total wind pressure will not be great, 
 some saving may be effected by using y%" Hy-Rib Lath or 
 Heavy Beaded Plate Rib Lath, making wall at least 1 
 thick. In this stucco construction it must be remembered 
 that the only way to insure permanence is to have a real 
 reinforced concrete slab on the outside. No lath weighing 
 less than 4% lbs. per square yard is strong enough to prop¬ 
 erly reinforce a concrete wall. 
 
 109 
 
Hy-Rib—A Kahn Building Product 
 
 Wonderful transformation of forty-five year old wood frame 
 house to modern stucco residence. 3 /s" Hy-Rib Lath was applied 
 directly to the old siding without the use of furring strips. 
 
 David Stott Estate, 1700 E. Jefferson Ave., Detroit, Mich. 
 John Shea, Plastering Contractor. 
 
 110 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Another method which has been extensively used in 
 our colder climates is to place on the outside of the stud¬ 
 ding -inch matched sheathing, heavy building paper, and 
 V%' Hy-Rib Lath, plastered 1 inch thick with cement mortar 
 properly waterproofed. No furring strips are required. 
 
 For our milder climates the furring may be omitted in 
 the first two methods described and the paper sheathing 
 may be omitted in all three cases. This reduces the cost 
 still further. . 
 
 HORIZONTAL SECTION THROUGH WALL VERTICAL SECTION 
 
 DETA/LED APPL/CAT/OH OP ^"hV P/B FOR STUCCO OVER WOOD 
 SHEA TH/NG OR S/DWG OF FRAME BU/LD//VG 
 
 “Over-Coated” Houses 
 
 An old wood frame building can be readily transformed 
 at nominal expense into a fine, stucco-finished building by 
 the use of Hy-Rib or Rib Lath. Wood furring strips are 
 eliminated by the use of Hy-Rib which is nailed directly to 
 the siding with the ribs in a horizontal direction. 
 
 The cement stucco plaster is applied directly to the Hy- 
 Rib or Rib Lath. This plaster should be the same as that 
 indicated for building walls and sidings, and the last coat 
 of plaster finish waterproofed with Trus-Con Water¬ 
 proofing Paste, Concentrated. The last coat may be of a 
 smooth, rough or pebble dash finish, as desired. The trans¬ 
 formation made in a house in this way is very wonderful, 
 enhancing the value and life of the property and protecting 
 it against fire. 
 
 Ill 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Garage for T. H. Kane, Youngstown, O. 
 Ready for Plastering and Completed. 
 
 112 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Garage for W. E. Parker, Grosse Pointe, Mich. 
 
 Hy-Rib Garage for Dr. Moran, Detroit, Mich. 
 
 113 
 
Hy-Rib—A Kahn Building Product 
 
 n - - o • —r~i 
 
 
 Cement 'Piaster on # 
 
 26 
 
 - ,s /i6" H 4 -T?ib 
 
 
 
 
 
 
 
 -Front Elevation of rence — 
 
 Details of HY-RIB Concrete Fence, with Reinforced Concrete 
 
 Posts. 
 
 114 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Fence, E. J. Smith, Detroit, Mich. 
 Note fence is open below. 
 
 Hy-Rib Fence, Ernest G. Swift, Detroit, Mich. 
 Note Hy-Rib Garage at Right. 
 
 115 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Concrete Fence, Minneapolis Ball Grounds. Hy-Rib 
 sheets are united by punching and placed a panel at a time. 
 Note the great saving in labor by the use of Hy-Rib 
 and this method of handling. 
 
 116 
 
Trussed Concrete Steel Co., Youngstown, (J. 
 
 On the Farm 
 
 Catalogue, “Hy-Rib Concrete Silos and Farm Buildings ” 
 sent on request. 
 
 The day of the unsightly short-lived wood frame build¬ 
 ings is passing, and in their place are found modern con¬ 
 crete structures. The average farm is provided with no 
 means of fighting fire, so that the slightest fire may cause 
 the total loss of a large amount of property. Fireproof con¬ 
 struction is a necessity in farm buildings. 
 
 Hy-Rib, owing to its simplicity and ease of application, 
 makes it possible for concrete construction to be carried 
 on by the ordinary farm mechanic. 
 
 The sand and stone for the concrete are easily accessible 
 in the neighborhood—the Portland cement is secured from 
 local dealers. Hy-Rib is shipped in exact lengths, and, 
 where desired, bent to any curve. Its uses are found in 
 the building of houses, barns, and sheds of all kinds—in 
 constructing culverts, cisterns, tanks and silos. Fences are 
 also built in this way. 
 
 We will gladly supply detailed information in regard to 
 any particular work that may be contemplated. 
 
 Hy-Rib Walls, Agricultural and Horticultural Building, 
 State Fair Grounds, Raleigh, N. C. 
 
 Frank fC. Thompson, Architect and Engineer. 
 
 117 
 
Hy-Rib—A Kahn Building Product 
 
 118 
 
 Hy-Rib Concrete Sidings on wood studs, before and after plastering. 
 Barns on Walker Bros.’ Farm, Walkerville, Ont. 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Albert Kalin, Architect, 
 Ernest Wilby, Associate. 
 
 “Wabeek Farm,” Birmingham, Mich. James Couzens, owner. 
 Creamery and Dairy Barn of Kahn System of Reinforced Concrete. 
 Two Hy-Rib Concrete Silos 20'x64'; also Hy-Rib Concrete Fences 
 and Partitions. 
 
 Hy-Rib Feed Barn and two Hy-Rib Silos. Espanore Farm, Lan¬ 
 sing, Mich. Ex-Governor Osborn, Owner. 
 
 119 
 
Hy-Rib—A Kahn Building Product 
 
 Two 14'x30' Hy-Rib Concrete Silos on the McBride Farm, Burton, 
 
 Mich. 
 
 Hy-Rib Concrete Silos for J. R. Cross Co., Jersey Farms, 
 Fairhope, Ala. 
 
 120 
 
Trussed Concrete Steel Co., Youngstown, O 
 
 Silos, Tanks, Reservoirs, 
 Cisterns and Chimneys 
 
 Write for Catalogue, “Hy-Rib Concrete Silos and Farm Buildings” 
 
 The curved Hy-Rib sheets are set up on edge and the 
 plaster applied directly to the inner and outer surfaces. 
 No forms of any kind are required. Vertical Rib Bars 
 about 5 feet apart should be used to serve as a guide for the 
 Hy-Rib sheets and to thoroughly tie the concrete work 
 together vertically. 
 
 Hy-Rib sheets provide in themselves a thorough inter¬ 
 locking splice at the ends and sides. Lap the sheets at 
 least 8 inches at ends and securely fasten together each 
 spliced rib. Splices in adjacent rings should be at least 
 two feet apart. 
 
 Follow specifications for Hy-Rib walls and sidings, page 
 62, for material and application of plaster. 
 
 It is usually difficult to plaster a solid wall to a greatei 
 thickness than 4 inches. When heavier solid walls are 
 required we recommend the use of a double layer of Hy-Rib. 
 pouring the concrete in between the two sheets. 
 
 Where an air space is desired on walls of silos an innei 
 and outer layer of Hy-Rib is used with our Kahn Pressed 
 Steel Hollow Studs to separate them. The inner wall is 
 plastered on both sides and the outer wall on the outside 
 only. 
 
 The roof of a silo can also be built of concrete and in 
 this way a permanent silo is secured at a cost but slightly 
 in excess of the ordinary short-lived wood construction. 
 
 121 
 
Hy-Rib—A Kahn Building Product 
 
 122 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Concrete 
 Grain Tank, Shreve¬ 
 port, La. Mr. J. Y. 
 Snyder, Architect. 
 
 Dust Collector, 
 Owosso Sugar Co., 
 Owosso, Michigan, 
 showing Hy-Rib be¬ 
 fore plastering with 
 cement mortar. 
 
 I 
 
 123 
 
Hy-Rib—A Kahn Building Product 
 
 Water Tank (Hy-Rib), Jefferson Powder Co., Birmingham, Ala. 
 Hy-Rib bent to exact curve in our shops. 
 
 124 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 20,000 Gallon Tank, Marine Biological Station, San Diego, Cal. 
 Irving J. Gill, Architect. 
 
 Tanks and Panels are built of Hy-Rib, Plastered with Concrete. 
 Posts and Girders are Kahn System Reinforced Concrete. 
 
 125 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib Concrete Culvert, Charleroi Mine, Carnegie Coal Co., 
 
 W. Monessen, Pa. 
 
 Note the corrugated metal culvert which has been removed to be 
 replaced by the permanent Hy-Rib concrete construction. 
 Only forms required are those at the sides. 
 
 Hy-Rib Passageway Connecting Buildings of Wayne County 
 Insane Asylum, Eloise, Mich. 
 
 126 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Conduits, Flumes and Culverts 
 
 The 15/16" Hy-Rib is bent to perfect curve in our shops. 
 Simply set up the curved sheets on the job, and apply the 
 concrete as a plaster. 
 
 Absolute continuity of reinforcement is secured by the 
 positive interlocking of the sheets at the sides and ends. 
 No forms (the principal item of expense in conduit con¬ 
 struction) or special field labor are required. A few rods, 
 as shown on illustration, extending the length of the con¬ 
 duit, should be provided to keep the Hy-Rib straight in 
 line and as an additional safeguard against any shrinkage 
 and temperature cracks. Rib Bars are recommended for 
 this purpose. 
 
 Either side of the Hy-Rib may be plastered first. 
 
 127 
 
Hy-Rib—A Kahn Building Product 
 
 Air Washer made by McCreery Engineering Co., Toledo, O. 
 Curved Hy-Rib Ready for Plastering. 
 
 Water-Flume for the Cia. Azucarera del Panuco, El Higo, Mex. 
 Hy-Rib ready for Concreting. 
 
 128 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Protecting Steel Penstock with thin Hy-Rib Concrete Shell 
 Applied to wood strips spaced 18" centers. This method eliminates heavy con¬ 
 crete casing and expensive forms. Oliver Iron Mining Co., 
 Quinnesec Falls, Iron Mountain, Michigan. 
 
 Hy-Rib Semi-Circles for Road Culverts, Klang, Federated Malay 
 
 States. 
 
 129 
 
Hy-Rib—A Kahn Building Product 
 
 Hy-Rib in Concrete Walls of Imhoff Tank, Altoona, Pa. 
 Geo. W. Fuller, Consulting Engineer. 
 
 Switchman’s or Gate Tender’s House Built 
 with Hy-Rib Walls and Roof. Northern 
 Pacific Terminal Co., Portland, Ore. 
 
 130 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 (Patented.) 
 
 Hand-Power Hy-Rib Bender 
 
 FOR CURVING 15/16" HY-RIB. 
 
 View shows ff w Hy-Rib in Machine. 
 
 The Hy-Rib Hand-Power Bender is readily operated by 
 two men, so that Hy-Rib can be shipped in straight sheets 
 and curved locally. This saves greatly in freight and crat¬ 
 ing charges, as curved Hy-Rib bulks largely and is much 
 more expensive to pack and ship than straight sheets. 
 
 The Hand-Power Bender curves Hy-Rib to any circular 
 arc with radius greater than 13 inches. 
 
 131 
 
Hy-Rib—A Kahn Building Product 
 
 Punching the Hy-Rib to engage the holes in the Plate Clips. 
 For plate clips see page 58. 
 
 132 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Hy-Rib Punch 
 
 (Patent Applied for) 
 
 Length of Handles, 30 inches. 
 
 PRICE, $6.00. 
 
 The H y - 
 Punch has two 
 uses; 1st, for fastening 
 the Hy-Rib sheets rigidly 
 together, by merely clamping 
 the interlocked ribs, doing away 
 with all necessity for wiring; 2nd, for 
 punching holes through the ribs, especially 
 when Hy-Rib is attached to steel work by means of the 
 plate clips, thus making a positive attachment between the 
 structural work and the Hy-Rib, and enabling the Hy-Rib 
 to carry maximum loads. 
 
 The use of the punch for Hy-Rib sidings is shown on 
 opposite page. The edge of the punch is lined up with 
 the edge of the plate clip, which can be readily seen through 
 the Hy-Rib mesh. The small point of the punch engages 
 in the hole of the clip and thus perfectly aligns the hole 
 in the Hy-Rib with that in the clip. A short piece of wire 
 or a nail slipped through the hole fastens the Hy-Rib 
 rigidly in place. The operation is very rapid and simple, 
 and much less expensive that wiring Hy-Rib to steel work. 
 
 On roofs the punch is used similarly and allows the 
 operator to stand erect while working. 
 
 133 
 
SHEARING SHEET OF 13/16" HY-RIB 
 WITH HY-RIB CUTTER. Also shears 
 15/16" Hy-Rib without change and 1/4" 
 
 Hy-Rib—A Kahn Building Product 
 
 134 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 
 (Patented.) 
 
 Hy-Rib Cutter. Price, $25.00 
 
 For Shearing All Types of Hy-Rib. 
 
 For ordinary work, where Hy-Rib must be cut to various 
 lengths, and fitted around openings, most builders find it 
 more economical to order Hy-Rib in standard lengths, and 
 cut the sheets to the required size on the job. 
 
 The Hy-Rib Cutter is a portable shear for cutting 
 Hy-Rib sheets to any desired length. It weighs only 85 
 lbs., and can be readily carried by one man from one 
 location to another. In jobs of any size, the Hy-Rib Cutter 
 pays for itself many times over. It saves time, labor and 
 expense over the use of the ordinary tinsmith’s tools. Many 
 of our representatives have Hy-Rib Cutters which can be 
 rented for use on small-sized jobs. 
 
 Hy-Rib Cutters are furnished complete, ready for mount¬ 
 ing on suitable base. The shear blades are detachable for 
 sharpening. 
 
 The Hy-Rib Cutter is designed so as to shear 13/16", 
 and 15/16" Hy-Rib with the same blades, and 1)4" Hy- 
 Rib by merely changing the blades in the cutter. These 
 two sets of blades are furnished with each cutter. 
 
 135 
 
Hy-Rib—A Kahn Building Product 
 
 Standard Rib Lath 
 
 Medium weight and generally useful in building work. 
 Size of Sheets —21x96 inches. 
 
 Shipped in bundles containing 12 sheets, or 18^4 yards. 
 
 Grade 
 
 Weight per 
 Square Yard 
 
 Maximum stud spacing 
 for walls (c. to c.) 
 
 Maximum joist spacing 
 for ceilings (c. to c.) 
 
 Rib Lath No. 1 
 
 2.74 lbs. 
 
 14 inches 
 
 12 inches 
 
 Rib Lath No. 2 
 
 3.42 lbs. 
 
 16 inches 
 
 14 inches 
 
 Rib Lath No. 4 
 
 4.10 lbs. 
 
 18 inches 
 
 16 inches 
 
 Furnished in Open Hearth or Copper Bearing Steel—All Painted. 
 
 “B” Rib Lath 
 
 Slightly wider mesh than Standard Rib Lath. 
 
 Size of sheets—25x96 inches. 
 
 Shipped in bundles containing 10 sheets, or 18^2 yards. 
 
 Grade 
 
 Weight per 
 Square Yard 
 
 Maximum stud spacing 
 for walls (centtr to center) 
 
 Rib Lath No. IB 
 
 2.28 lbs. 
 
 12 inches 
 
 Rib Lath No. 2B 
 
 2.85 lbs. 
 
 14 inches 
 
 Rib Lath No. 4B 
 
 3.43 lbs. 
 
 16 inches 
 
 Furnished in Open Hearth or Copper Bearing Steel—All Painted. 
 
 136 
 
Trussed Concrete Steel Co., Youngstown, Ohio 
 
 Beaded Plate or “A” Rib Lath 
 
 Somewhat heavier than Standard or “B” Rib Lath, but 
 really more economical, as it permits wider spacing of 
 the studs and effects a very great saving in labor and plas¬ 
 ter. Two-coat work can be accomplished on this as con¬ 
 trasted to three-coat work on other metal laths. 
 
 Size of sheets—15^x96 inches. 
 
 Shipped in bundles contai ning 16 sh eet s, or 18p£ yards. 
 
 Grade 
 
 Weight per 
 Square Yard 
 
 Maximum stud spacing 
 for walls (c. to c.) 
 
 Maximum joist spacing 
 for ceilings (c. to c.) 
 
 Rib Lath No. 1A 
 
 3.66 lbs. 
 
 18 inches 
 
 16 inches 
 
 Rib Lath No. 2A 
 
 4.54 lbs. 
 
 20 inches 
 
 18 inches 
 
 Rib Lath No. 4A 
 
 5.45 lbs. 
 
 24 inches 
 
 22 inches 
 
 Furnished in Open Hearth or Copper Bearing Steel—All Painted. 
 
 137 
 
Hy-Rib—A Kahn Building Product 
 
 Detroit Diamond Lath 
 
 Size of Sheet, 24x96 inches. 
 
 Gauge 
 
 Sheets 
 per Bundle 
 
 Yards 
 per Bundle 
 
 Weight per 
 Square Yard 
 PAINTED 
 
 Weight per 
 Square Yard 
 GALVANIZED 
 
 No. 27 
 
 15 
 
 26% 
 
 2.48 lbs. 
 
 2,88 lbs. 
 
 No. 26 
 
 15 
 
 26% 
 
 2.68 lbs. 
 
 3.08 lbs. 
 
 No. 25 
 
 15 
 
 26% 
 
 3.10 lbs. 
 
 3.50 lbs. 
 
 No. 24 
 
 15 
 
 26% 
 
 3.50 lbs. 
 
 3.90 lbs. 
 
 Universal Diamond Lath 
 
 Size of Sheet, 28x96 inches. 
 
 Gauge 
 
 Sheets 
 
 Yards 
 
 Weight per 
 Square Yard 
 
 Weight per 
 Square Yard 
 
 per Bundle 
 
 per Bundle 
 
 PAINTED 
 
 GALVANIZED 
 
 No. 26 
 
 14 
 
 29 
 
 2.30 lbs. 
 
 2.70 lbs. 
 
 No. 24 
 
 14 
 
 29 
 
 3.00 lbs. 
 
 3.40 lbs. 
 
 Furnished in Open Hearth or Copper Bearing Steel— 
 Painted or Galvanized Before Expansion. 
 
 Trus-Con Metal Base Screeds 
 
 eliminate wood 
 grounds be¬ 
 tween cement 
 bases and plas¬ 
 ter above. Fur¬ 
 nished in three 
 types: straight 
 point, curved 
 point, slant 
 point. 
 
 Straight Point Metal Base Screed. 
 
 138 
 
Trussed Concrete Steel Co., Youngstown, O. 
 
 Corner Beads 
 
 Our Steel Corner 
 Beads are galvanized 
 after forming. We fur¬ 
 nish four different types 
 of beads in lengths from 
 6 to 10 feet, to meet 
 every requirement for 
 the perfect protection 
 of plaster corners. 
 
 Detroit Steel Corner 
 Bead — see illustration. 
 
 Detroit T-Rail Corner 
 Bead — similar to De¬ 
 troit Steel Corner Bead. 
 
 Rib Steel Corner Bead 
 —see illustration. 
 
 Rib Feather -Edge 
 Corner Bead —for fine, 
 sharp corners. 
 
 Waterproofing and Technical Paints 
 
 Concrete construction when in exposed positions should 
 be properly finished and waterproofed by Trus-Con Chem¬ 
 ical Products, consisting of a complete line of distinct 
 products for this class of work. Handbook on request. 
 
 Reinforced Concrete 
 
 The Kahn Building Products, successfully used in over 
 fifteen thousand important structures, includes the follow¬ 
 ing reinforcing products. Kahn Trussed Bars, Rib Bars, 
 Collapsible Column Plooping, Rib Metal, Hy-Rib, Steel 
 Floretyles, Floredomes and Building Specialties. Also 
 Trus-Con Inserts for attaching shafting; Kahn Armor 
 Plates and Kahn Road Mesh for concrete pavements, and 
 Kahn Curb Bars. 
 
 Steel Sash for Windows 
 
 United Steel Sash provide maximum daylight and per¬ 
 manence of window opening, have exceptional strength and 
 superior weathering, are fitted with hardware made in 
 our own plant, and include all types of sliding and pivoted 
 sash, continuous sash, partitions, doors, casements, etc. 
 
 Rib Steel Corner Bead. 
 
 139 
 
Hy-Rib—A Kahn Building Product 
 
 PRESSED STEEL CHANNEL 
 FOR SUSPENOC0 CEILING 
 
 KAHN PRESSED STEEL 
 CHANNEL STUD 
 
 WIRING FOR 
 ERECTION 
 
 WINDOW SILL 
 
 KAHN PRESSED STEEL 
 I BEAM 
 
 Kahn Pressed Steel Construction 
 
 (See also pages 87 to 89.) 
 
 y 8 " Hy-Rib Lath is used extensively in connection with 
 Kahn Pressed Steel Construction for floors, ceilings, walls, 
 partition's, etc. This construction is fire-resisting, perma¬ 
 nent and economical, being particularly adapted for group 
 houses, apartment houses, small stores, and for floor con¬ 
 struction generally. 
 
 140 
 
Trussed Concrete Steel Co., Youngstown, Ohio 
 
 A large variety 
 of Pressed Steel 
 members, consist¬ 
 ing of beams, 
 channels, joists, 
 rafters, plates, 
 studs, etc., are 
 manufactured by 
 The Trussed Con¬ 
 crete Steel Co. 
 They are fabri¬ 
 cated completely 
 in our shops so 
 that no further 
 work on them is 
 required at the 
 building site. The 
 improved 
 standard connec- 
 t i o n eliminates 
 all punching, riv¬ 
 eting and bolting. 
 The only tool re¬ 
 quired is the ham¬ 
 mer. The Hy- 
 Rib is quickly at¬ 
 tached by bend- 
 ing over the 
 prongs on the 
 Pressed Steel 
 members. 
 
 Complete in¬ 
 formation, pam¬ 
 phlet, estimates, 
 etc., will be furn¬ 
 ished to interested 
 parties. 
 
 THE ONLY TOOL REQUIRED IS A HAMMER 
 
 The simple and easy way of attaching the H" Hy-Rib 
 Lath to Kahn Pressed Steel Studs. 
 
 STANDARD PRESSED STEEL FLOOR CONSTRUCTION WITH 
 WOOD FLOOR FINISH AND PLASTERED CEILING. 
 
 141 
 
Hy-Rib—A Kahn Building Product 
 
 : 
 
 Steel Floretyle Construction 
 
 Ys" Hy-Rib Lath is used for ceilings in connection with 
 Steel Floretyle and Steel Floredome construction. The 
 Hy-Rib forms a Hat ceiling and provides a perfect surface 
 for plastering. 
 
 Steel Floretyle construction consists of rows of hollow 
 steel tile covered with a thin layer of concrete and separated 
 by reinforced concrete joists. These joists, spaced approx¬ 
 imately 24 y 2 " centers, carry the load directly to the sup¬ 
 ports, while the Floretyle acts merely as a filler, saving 
 concrete and reducing dead load. The corrugated Flore- 
 tyles have deep stififening ribs across the top, and especially 
 formed corners, corrugated sides and corrugated flanges 
 along the bottom edges, so as to provide great stiffness in 
 supporting loads. 
 
 Steel Floredomes are similar to Floretyles, except that 
 they are only open on the under side, so that joists may 
 extend on all sides of the dome, and carry the loads in two 
 directions to the supports. 
 
 More complete information on Floretyle and Floredome 
 constructions is furnished in special literature. 
 
 142 
 
INDEX OF CONTENTS 
 
 PAfiK 
 
 Air Washer .128 
 
 Angles for Hy-kib (No. 22 gauge). 81 
 
 Arched Floors .10-41 
 
 Bases, Cement for Partitions. 73 
 
 Base Screeds .138 
 
 Beads, Corner .139 
 
 Bending Hy-Rib, Types of. 9 
 
 Bender for Hy-Rib (Hand Power) . 131 
 
 Bridge Floor . 19 
 
 Business Buildings .105 
 
 Ceilings . . ..,.92-101 
 
 Details of Suspended.99-101 
 
 Minimum Requirements .101 
 
 Centering Max. Spans of Hy-Rib.38-39 
 
 Channels, Pressed Steel.87-90 
 
 Chimneys.121 
 
 Cisterns. 121 
 
 Clips, Plate.58-59 
 
 Clips, Rib . 99 
 
 Conduits.127 
 
 Corner Beads .139 
 
 Culverts.126-129 
 
 Curved Hy-Rib. 9 
 
 Cutter for Hy-Rib.134-135 
 
 Depths of Ribs .6—8 
 
 Designing Data for Hy-Rib. 37 
 
 Detroit Steel Corner Beads.139 
 
 Detroit Diamond Lath.138 
 
 Dome of Hy-Rib. 34 
 
 Door Frames in Walls and Parti¬ 
 tions .83, 84. 103 
 
 Explanation of Hy-Rib Tables. 37 
 
 Fan House . 57 
 
 Farm, Uses of Hy-Rib on.117-125 
 
 Fences.114-116 
 
 Finishing Concrete .139 
 
 Fire Test on Concrete Tank. 36 
 
 Fire Test on Hy-Rib Arch. 20 
 
 Fire Test on Hy-Rib Partition.... 66 
 
 Floors .10-41 
 
 Arched.10-41 
 
 Bridge . 19 
 
 Fire Test on. 20 
 
 Safe Loads for.38-39 
 
 Specifications for .40-41 
 
 Types of .14-15 
 
 Floretyles and Floredomes.142 
 
 Flumes.128 
 
 Furring .102-103 
 
 Garages.105-113 
 
 General Uses of Hy-Rib. 5 
 
 Hand Power Hy-Rib Bender.131 
 
 Hoisting Hy-Rib en Masse. 77 
 
 Houses .104-111 
 
 Hy-Rib Described . 5 
 
 Bender (Hand Power).131 
 
 Bent to Curve. 9 
 
 Clips.58, 99 
 
 Cutter .134-135 
 
 Properties.6-8 
 
 Punch .132-133 
 
 Types. 6-7 
 
 Industrial Buildings .105 
 
 Interlocking Hy-Rib Sheets. .. .11, 76 
 Kahn Pressed Steel Construc¬ 
 tion .87-91, 140-141 
 
 Lath, Diamond .138 
 
 Lath, Rib .136-137 
 
 Loads Carried by Hy-Rib Slabs. .38-39 
 
 Load Test .20, 36 
 
 Loads Carried by Arched Hy-Rib 
 Floors . 21 
 
 Max. Spans, Hy-Rib as Centering. 38-39 
 
 Ordering Hy-Rib . 8 
 
 Overcoated Houses . 108-111 
 
 Partitions. 64-91 
 
 Cement Bases . 73 
 
 Channel Partitions . 90 
 
 Details. 80-84 
 
 Door Framing Into. 83, 84 
 
 Fire Test on Hy-Rib. 66 
 
 Fireproof Door Frames in. 84 
 
 Hollow Partitions . 91 
 
 Minimum Requirements of. 85 
 
 Specifications for Solid....i. 85 
 
 Soundproofness of . 67 
 
 Temporary Bracing for. 78-79 
 
 With Reinforced Concrete. 80 
 
 Plate Clips . 58-59 
 
 Pressed Steel Construction 
 
 . 87-91, 140-141 
 
 Properties of Hy-Rib. 6-8 
 
 Punching Hy-Rib Sheets. 76, 132 
 
 Punch for Hy-Rib. 132-133 
 
 Raising Hy-Rib en Masse. 77 
 
 Reinforced Concrete . 139 
 
 Reinforced Concrete with Hy-Rib 
 
 Partitions. 88 
 
 With Hy-Rib Walls. 60-61 
 
 Reservoirs. 121 
 
 Residences . 104-111 
 
 Rib Clips . 99 
 
 Rib Lath . 136-137 
 
 Rib Steel Corner Beads. 139 
 
 Roofs . 22-41 
 
 Fire Tests on. 20 
 
 Sawtooth. 27-32 
 
 Safe Loads on Hy-Rib. 38-39 
 
 Specifications for . 40-41 
 
 Tile Supports, Details of. 30 
 
 Safe Loads for Hy-Rib Slabs.... 38-39 
 
 Sash (Steel) for Windows.. . .139 
 
 Sawtooth Roofs . 27-32 
 
 Screeds, Metal Base. 138 
 
 Sidings and Walls. 42-63 
 
 Minimum Requirements for. 63 
 
 Specifications for . 62-63 
 
 Silos. 117-121 
 
 Small Buildings . 104-113 
 
 Soundproofness of Hy-Rib Partitions 67 
 Specifications for Arched Floors... 41 
 
 For Ceilings Suspended. 101 
 
 For Furring .. 103 
 
 For Hy-Rib Floors and Roofs. 40-41 
 
 For Solid Partitions. 85 
 
 For Walls and Sidings. 62-63 
 
 Steel Sash for Windows. 139 
 
 Steel Studs . 87-91 
 
 Tanks. 36, 120-125 
 
 Temporary Bracing, Partitions. . . .78-79 
 Temporary Supports for Hy-Rib 
 
 Slabs . ; . 37 
 
 Tests . 20, 36, 66-67 
 
 Tongue Angles. 81 
 
 Trus-Con Metal Base Screeds. 138 
 
 United Steel Sash. 139 
 
 Universal Diamond Lath. 138 
 
 Walls and Sidings. .. .. 42-63 
 
 Minimum Requirements for. 63 
 
 Of Residences . 104-111 
 
 Specifications for. 62-63 
 
 Waterproofing Concrete . 139 
 
 Window Frames in Walls and Par¬ 
 titions .83, 106 
 
INDEX OF ILLUSTRATIONS 
 
 Agricultural Bldg., Raleigh, N. C.117 
 American Car & Fdry. Co., Roofs.. 33 
 
 Alt Heidelberg, Ft. Wayne.103 
 
 Amer. Auto. Rv. Switch Co. 52 
 
 American Well & Prospecting Co. 47 
 Barry Mfg. Co., Roofs & Sidings.. 54 
 
 Bending Hy-Rib. 9 
 
 Joseph Bendt Store, Arched Floor. . 10 
 Birmingham Fuel Co. Fan House.. 57 
 
 Bremer Arcade Bldg., Ceilings. 92 
 
 E. W. Browning, Apt. Hotel. 69 
 
 Calhoun Bath House, Partitions. . 75 
 
 Carnegie Coal Co.126 
 
 City Water Works, Detroit, Roof.. 30 
 
 Columbus Mach. & Tool Co. 49 
 
 Concrete Grain Tank.123 
 
 Conduit.127 
 
 Continental Motor Mfg. Co., Roof. 28 
 1. R. Cross & Co., Fairhope, Silos.120 
 
 Crown Building, Ceiling. 94 
 
 Culverts, Klang, F. M. S.129 
 
 Details of Floor Construction. 14 
 
 Details of Hy-Rib Fence.114 
 
 Details of Hy-Rib Partitions ....80-84 
 Details of Plate Clip Connections.. 59 
 
 Details of Roof Tile Supports. 30 
 
 Details of Suspended Ceilings. 100-101 
 
 Details of Walls. 60-61 
 
 Details of Walls of Residences. 106-107 
 Detroit Crematorium Mausoleum. . 75 
 
 Diamond Lath .138 
 
 Detroit Salt Works, Sidings. 46 
 
 Detroit Steel Corner Bead.....139 
 
 Dodge Bros.’ Power Bldg., Part.. . . 79 
 District Court House, Hy-Rib Floors 16 
 
 D. A. C. Bldg., Hy-Rib Floor. 17 
 
 Eastern Coal Dock Co., Sidings.... 49 
 Espanore Farm, Birmingham, Mich.119 
 
 Fairview Mausoleum, Roofs.. 34 
 
 Favorite Stove & Range Co., Sidings 48 
 Featberstone Foundry Co.. Roofs...26 
 Fire Test on Hy-Rib Partitions.... 66 
 
 Fire Test on Hy-Rib Arch. 20 
 
 Fire Test on Hy-Rib Tank. 36 
 
 Eloretyle and Floredome.142 
 
 Edw. Ford Plate Glass Co.16, 24 
 
 Ford Motor Co.27, 52 
 
 Barden Court Apartments, Ceilings 98 
 Germantown High School, Ceilings 98 
 
 Glenmore Distillery . 53 
 
 Great Lakes En. Wks. 53 
 
 Hayden Pump Co., Roof. 22 
 
 Hawaiian Pineapple Co.. Floors... 12 
 
 Miss Alice Henck, Residence.104 
 
 Hill Memorial Hall, Ceilings...... 95 
 
 High School, Alliance, O., Ceilings 93 
 
 Holyoke Gas Works, Sidings. 50 
 
 Husted Milling Co., Sidings.. 45 
 
 Hutchinson High School, Ceiling.. 94 
 
 Hy-Rib Bender, Hand Power.131 
 
 Hy-Rib Cutter.135 
 
 Hy-Rib Punch .133 
 
 Unhoff Tank, Altoona, Pa., Walls.. 130 
 Independent Co-operative Milling 
 
 Co., Grain Tanks .122 
 
 International Harvester Co.. Roof. 28 
 Interstate Telephone Co., Ceilings. 97 
 
 lackson Cushion Spring Co. 31 
 
 Jefferson Powder Co., Water Tank. 124 
 K. of P. Orphanage, Weatherford, 
 
 Texas, Floor .. 17 
 
 Kahn Pressed Steel.87. 140 
 
 Kane, T. H.. Garage.112 
 
 Kempsmith Mfg. Co., Roof. 29 
 
 Kuhlman and Meyers Grain Tanks.122 
 
 PACE 
 
 Lake Superior Iron & Chem. Co.. 50 
 
 Load Test on Hy-Rib Slab. 36 
 
 Louisville Rv. Co. Roofs. 28 
 
 C. A. Mangold, Residence. 56 
 
 Marine Biological Station, Tank...125 
 
 Mark Mfg. Co., Sidings. 42 
 
 Maryland Steel Co. 51 
 
 Merchants’ Realty Co., Partitions.. 64 
 
 Michigan Central R. R., Roof. 25 
 
 Milwaukee Corrugating Co., Roofs. 27 
 Minneapolis Ball Grounds, Fence...116 
 
 Dr. Moran, Detroit, Garage.113 
 
 Motor Garage, Lumpur, F. M. S.. 55 
 Mount St. Joseph Academy, Ceiling 97 
 
 McBride Farm, Silos...120 
 
 McCreary Engr. Co., Air Washer. 128 
 National Baseball League. Grand 
 stand, Cincinnati and New York 74 
 New Monroe Bldg., Partitions.... 69 
 N. Y., Westchester & Boston R. R 54 
 North Adams Power Co., Floors... 13 
 Northern Pacific Terminal Switch¬ 
 man House .130 
 
 Oliver Chilled Plow Co., Roof. 32 
 
 Oliver Iron Mining Co., Penstock. .129 
 
 Overcoating Houses .108-111 
 
 Owosso Sugar Co.123 
 
 Packard Motor Co., Roof. 22 
 
 W. E. Parker, Garage.133 
 
 Pennsylvania Rubber Co., Roof.... 31 
 
 Plate Clips . 58 
 
 Plaza Hotel, Partitions and Ceilings 86 
 
 F. R. Plumb Tool Co., Roof. 29 
 
 Power House, Gainesville, Texas... 55 
 Presidential Palace, Havana, Dome 34 
 Punching Hy-Rib for Plate Clips... 132 
 Punching and Interlocking Hy-Rib 76 
 
 Quarantine Hospital, Sidings. 56 
 
 Quincy Gas, Elec. & Heat Co. 53 
 
 Raising Hy-Rib En Masse. 77 
 
 Rib Clips .81, 99 
 
 Rib Lath .136-137 
 
 Rib Steel Corner Beads.139 
 
 St. Mary’s Hospital, Arched Floor. 18 
 
 Shearing a Sheet of TJy-Rib.134 
 
 Smith Bros.’ Grain & Elev. Co.... 46 
 
 Steel Studs . 87 
 
 F.. J. Smith, Detroit, Fence.115 
 
 Southern Methodist Univ., Roofs.. 33 
 
 ■NT. J. Spaulding, Residence.108 
 
 St. Andrew’s School, Floor. 19 
 
 Stott’s Residence, Overcoated.110 
 
 Sunset Publishing Co., Walls. 4 4 
 
 E. G. Swift, Fence....:..115 
 
 Temporary Bracing for Partitions.. 78 
 Temporary Supports for Hy-Rib... 3" 
 
 Texas State Fair Assn., Walls. 44 
 
 Dr. W. S. Terriberry, Residence. . .10^ 
 
 Trus-Con Metal Base Screeds.13C 
 
 Trussed Concrete Bldg., Partitions. 76 
 
 Toiler Hotel, Detroit, Ceilings. 96 
 
 Types of Hy-Rib Floors.14-lf 
 
 Union St. Ry. Co., Arched Floors. 1C 
 Viaduct over Nolan Creek, Floor.. 19 
 Wabeek Farm, Birmingham, Mich. 119 
 
 Walker Bros’. Farm, Sidings.11F 
 
 Wall Construction of Houses.1C"' 
 
 Warren City Tank & Boiler Wks., 
 
 Sidings.42 
 
 Water Flume, El Iligo, Mexico.... 128 
 
 Wayne Co. Insane Asylum.126 
 
 Western Sugar Refining Co. 3? 
 
 Westgate Common Mills, Floor. . . I s 
 Y. M. C. A., Portland, Ore., Part. 71 
 Y. M. C. A., Mexico Citv, Partition 68 
 Youngstown Plant, Buildings.4, 35, 47 
 
 Tornt D214 10M T.C.S.Co. Press 5-16-P.