u ■wf Vi 1 |» JtSiyPHBS ft;,-:'}- ? - ! ■ 1 " *?< v- ; v:.jr.' • lSb£Hj%?-'i. u‘ . Jfej *®CH A- .\ii ‘ v :'ft;' ••>• % mm ■ ,,;•■• x • llig 1 1 ■ /•' / . v ‘. im ' ■■■ W$&%-' y ■ •• ^ ' •■• •••/• • Iffevs-te . . : - ' - ‘ '■■/ , .•.' ■• i - s#: • '.Ijc.r'' » *'• /•-Jr« v » • •i l*s " ■ i • ■ ’ t Xfi# *1 n*»L fc jT ft. r j. i. \v(:. y_K^' i -J.W .?,•■• -i #r>-- •■• <•. iw*. i 1 ? VIM *#*» l:Umk wilA- JL.. ,; V, ■ ,*& HP? 5f- Yi- 'V. V : *A? ft.- >'-. v '►V << ,l < v 'iji '• J ’- ! aPWFHi ! -fln.IW! vfV. ff fc *.-‘• TIE FIREPROOFING SYSTEAV WITH TfflRTY YEARS OF PROOF THE FIREPROOFING SYSTEM WITH THIRTY YEARS OF PROOF Applied throughout the United States and Canada by the KEYSTONE GYPSUM FIREPROOFING CORPORATION 1328 BROADWAY, NEW YORK, N. Y. Philadelphia, Pa. North American Building Branches: Washington, D. C. Real Estate Trust Building Richmond, Va. 418 East Main Street KEYSTONE FIREPROOFING COMPANY OF CANADA, Ltd. Montreal 603 New Birks Building Quebec 103 St. John Street Toronto 250 Richmond Street, W. © 1924. Keystone Gypsum Fireproofing Corporation AVERY LIBRARY COLUMBIA UNIVERSITY Contents 1 The Metropolitan System — What it is and How it is Applied (See Pages 3 to 6) y The Advantages of the Metropolitan System (See Pages 7 to 13) ? The System as Applied to Floors (See Pages 14 to 20) The System as Applied to Roofs (See Pages 21 to 30) b Technical Data—Insulating Value, Tests, Tables, Structural Details and Reports (See Pages 31 to 45) Installations (See Pages 46 to 52) THE METROPOLITAN SYSTEM WHAT IT IS AND HOW IT IS APPLIED T HE Metropolitan System is a system for constructing fireproof floors and roofs. It is generally applied to a steel frame, but it can also be applied to re¬ inforced concrete frame or a frame of wood. It is a system which, for more than thirty years, has demonstrated its prac¬ tical advantages on hundreds of installa¬ tions scattered throughout the United States and Canada under a wide extreme of climatic conditions. It is used in— Office Buildings Public Buildings Factories Paper Mills Theatres Garages Schools Hospitals Apartment Houses Hotels Foundries Churches Clubs, Etc. “The principle is that of a suspension bridge. It is a monolithic gypsum slab poured in place on parallel and uniformly spaced cables, the ends of the cables se¬ curely and rigidly anchored to the frame of the building. Enough cables are put in to carry the total load, with a factor of safety of four, without regard to *the compres¬ sive value of the Metropolitan compo¬ sition. The Metropolitan composition is CALCINED Gypsum, Stucco, or chem¬ ically C a S 0 4 . This composition solidifies so rapidly that within fifteen minutes after it is poured you may walk on it without leaving a footprint, and it is perfectly safe and practical as far as the strength of the slab is concerned to remove the forms within sixty minutes of the time the composition is poured and it is then ready to receive the load for which it is designed. [ 3 ] The following important installations are representative of this work: STORIES OFFICE AND OTHER BUILDINGS IN NEW YORK CITY Sixty Wall Street, Building. 28 Forty-two Broadway, Building. 21 Hudson Building, 32-34 Broadway. 16 Atlantic Mutual Building, 49 Wall Street. 18 Beaver Building, Beaver and Pearl Streets. 16 Singer Building, Broadway and Prince Street. 12 Woodbridge Building, William and John Streets. 13 Samson Building, 63-65 Wall Street. 12 Bancroft Building, 5-7 West 29th Street. 10 Stan dish Arms Hotel, Brooklyn. 12 Republican Club, 54-56 West 40th Street. 12 Garvin Machine Co. Bldg., Varick and Spring Streets. 8 Broadway Tabernacle, 56th Street and Broadway. 7 Hotel Stratford, 11-13 East 32nd Street. 13 Astor Apartments, 75th Street and Broadway. 8 And many others. SIMILAR BUILDINGS ELSEWHERE IN THE U. S. Richmond Trust Building, Richmond, Va. 8 State Office Building, Richmond, Va. 12 Marywood College, Scranton, Pa. 4 Carbondale High School, Carbondale, Pa. 3 And many others. SIMILAR BUILDINGS IN CANADA Central Technical High School, Toronto, Ont. 4 Sauvegarde Life Building, Montreal. 9 Royal Bank Building, Montreal. 4 And many others. INDUSTRIAL BUILDINGS IN U. S. Bureau of Yards and Docks, U. S. Navy, 15 Installations, 1,556,000 sq. ft. Bethlehem Steel Co., 24 Installations, 1,629,000 sq. ft. Baldwin Locomotive Works, 15 Installations, 1,391,000 sq. ft Ingersoll-Rand Co., 5 Installations, 595,000 sq. ft. Scoville Mfg. Co., 6 Installations, 332,000 sq. ft. Midvale Steel Co., 6 Installations, 468,000 sq. ft. National Tube Co., 2 Installations, 230,000 sq. ft. American Locomotive Co., 2 Installations, 350,000 sq. ft. And many others. INDUSTRIAL BUILDINGS IN CANADA Abitibi Power & Paper Co., Iroquois Falls, Ont. St. Lawrence Paper & Pulp Co., Three Rivers, Que. Wyagamac Pulp & Paper Co., Three Rivers, Que. And many others. (For more complete list of Installations, see Pages 46 to 5;) HEIGHT IN FEET 340 24O 221 260 200 170 170 161 H3 140 100 100 100 100 100 110 145 65 50 65 110 70 METHOD OF APPLICATION McGraw-Hill Bldg., New York, N. Y. 1-FORMING The first step in applying the Metro¬ politan System is to erect wooden forms or centers in which the Metropolitan composition is later to be poured. This form work is similar to that used in con¬ crete construction. The above photograph shows the con¬ struction and placement of such forms on a roofing job undertaken for the McGraw-Hill Building in New York City. Projectile Plant, Charleston, W. Va. 2- REINFORCEMENT Cables composed of twisted galvanized wire are laid parallel and carried over the top of the beams or purlins to the outside wall beams or end purlins and there secured by strong anchors. These cables are then uniformly deflected by means of a round iron deflection bar placed midway between purlins. The above photograph shows the an¬ choring of these cables to a wall beam in work undertaken for the Projectile Plant in Charleston, W. Va. Is] ^. df METROPOLITAN \ SYSTEM m FLOORS and HOOFS METHOD OF APPLICATION State Office Bldg., Richmond, Va. 3-POURING The Metropolitan composition is poured in place and brought to uniform surface, forming a slab ready to receive the sleeper fill in the case of floors or the grading and finished waterproofing in the case of roofs. The above photograph shows the pouring, spreading and trowelling of the Metro¬ politan composition on the State Office Building, Richmond, Va. Haddon Hall, Atlantic City, N. J. 4-REMOVAL OF FORMS The composition sets so fast that it is perfectly safe and practical to remove the forms within sixty minutes after the composition is poured. A fair idea of the smooth and pleasing appearance of the soffit of the slab is shown by the above photograph ot the intrados of the arched Metropolitan slab (43' 6" radius) forming the ceiling of the Tea Room of Haddon Hall, Atlantic City, N. J., Rankin, Kellogg & Crane, architects. [6] THE ADVANTAGES OF THE METROPOLITAN SYSTEM Several very distinct advantages may be obtained by the use of the Metropolitan System 1 — SAFETY AND STRENGTH (See page 8) Galvanized steel wire cables support the entire load in tension. As is universally known, steel wire is not only the strongest, but it is also the most eco¬ nomical form in which steel can be used, especially when used in tension. The cables are stretched and deflected before the composition is poured, so that the reinforcement is easy to inspect and the human equation is reduced to a minimum. 2— ECONOMY OF FIRST COST (a) Light Weight (See Page 9) (b) Rapidity of Construction (See Page 9) (c) SmallerTonnageofSteel Required (See Page9) 3— NON-CONDUCTIVITY (See Page 10) (a) With consequent Absence of Condensation (See Page 10) (b) And Substantial Reduction in Heating Cost (See Page 11) 4— DURABILITY (See Page 11) 5— FIRE RESISTANCE (See Page 12) 6 — LOW MAINTENANCE (See Page 12) 7— REPLACEMENT (See Page 12) 8— SERVICE (See Page 13) 9— GUARANTEED CONSTRUCTION (See Page 13) These various advantages are described in detail on the following pages as noted above. 1 — Safety and Strength THE SUSPENSION SYSTEM The suspension principle—a strictly metal construction—makes the Metro¬ politan System the safest and strongest type of roof and door construction on the market. Stresses are calculated by approved en¬ gineering formulae and strength may therefore be determined with accuracy. The loads are supported entirely by steel wire cables rigidly anchored at each end and brought into uniform dedection and tension. Note the dedection bar in accompanying photograph. The crushing strength of the Metro¬ politan Composition is about 400 lbs. per square inch but, unlike concrete con¬ struction, the strength of the composition is entirely disregarded, thus providing an additional factor of safety. The com¬ position is used merely to protect the wires and structural framework against dre and corrosion and to distribute the load while the support of the load is left entirely to the strength of the galvanized steel cables. The above may be demonstrated by in¬ stalling the cables over a given area of the roof, anchoring the cables at the ends in the usual manner, and then covering the cables with a tarpaulin and applying the total load for which the cable spacing is designed. This will clearly show that the strength of the composition is omitted and that the cables safely carry all the load. This is important because all gypsum materials when wet get soft, and lose some of their already low compressive value. In case of the Metropolitan System this does not affect the strength of Galvanized Steel Wire Reinforcement American Locomotive Works, Schenectady, N. Y. Additional Story—Curtis Publishing Co. Bldg. Curtis Publishing Co., Philadelphia, Pa. [8] Swarthmore Apartments, Philadelphia, Pa. the slab, as the strength of the slab depends on the cables alone. The composition, however, does add strength to the slab and increases the factor of safety, but this increase is ignored in design. 2 — Economy of First Cost THE LIGHT WEIGHT SAVES MONEY AND INCREASES SAFETY Weighing but 5 pounds per square foot per inch of thickness, the Metropolitan is the lightest type of fireproof floor and roof construction on the market at the present time. The minimum thickness is 3". This extreme lightness in weight saves money and increases safety not only in new construction but in replace¬ ments and additions to old buildings. Wooden roofs, for instance, can be re¬ placed by the Metropolitan System with¬ out either strengthening or overloading the existing frame. Should additional floors be required as in the case of the building for the Curtis Publishing Co., Philadelphia, shown on page 8, the Metropolitan System proves the most economical and safest form of construction. RAPIDITY OF CONSTRUCTION Metropolitan floors and roofs may be installed more rapidly than any other type of fireproof construction. The Metro¬ politan composition sets so fast that one may walk on it fifteen minutes after it is poured without leaving a footprint, and it is perfectly safe and practical to remove the forms within sixty minutes after the composition has been poured and obtain the full live load for which the slab is designed. The accompanying photograph of the Swarthmore Apartments, N. E. corner 22nd and Walnut Streets, Philadelphia, Clinton & Russell, New York, architects, stands as a monument to the speed with which this system may be installed, as this job was put up, twelve floors and roof, in fourteen working days. See progress pictures, page 17. The Metropolitan composition sets so fast that it sets before it freezes. We have satisfactorily installed slabs when the temperature was 35 0 below zero. SMALLER TONNAGE OF STEEL REQUIRED The extreme lightness in weight of Metropolitan composition makes possible [ 9 ] -''''METROPOLITAN SYSTEM FLOOR S an PR OOF I^£vv yorkTity a substantial saving in the frame, and in the case of an all steel building, the use of the Metropolitan System enables the builder to save as much as 35% of the steel called for by the original design for concrete or hollow tile. \\ henever invited to do so we cheerfully submit with our proposal a guaranteed estimate of the number of tons of structural steel that may be saved by the use of the Metropolitan system. 3 — Non-Conductivity or Insulating Value The Metropolitan composition consists of calcined gypsum and wood planer chips. It develops the highest degree of fire resistance, non-conductivity or in¬ sulating value ever obtained in any structural material. The wood chips give the Metropolitan composition a degree of toughness and elasticity far greater than is found in any other fireproof material. The quantity being small, “.the chips are com¬ pletely insulated by the large mass of gypsum, and in no way detract from the fire resistance or insulating value.” Abundant evidence of this has been given in every test or actual fire to which the Metropolitan composition has been sub¬ jected. I he table at the right shows the exact difference in insulating value of several materials, including the Metropolitan composition. A series of interesting tests were con¬ ducted by Prof. C. L. Norton of the Massachusetts Institute of Technology. I hese tests prove conclusively that as a non-conductor the Metropolitan composi¬ tion is decidedly superior to any other fireproof material on the market. Non-conductivity is vitally important not only as a protection against fire, but to prevent condensation within a building as well as to conserve heat. ABSENCE OF CONDENSATION Condensation troubles can be traced directly to materials possessing an in¬ adequate insulating value. Differences between interior and exterior tempera¬ tures cause moisture to collect on soffits of slabs with consequent annoyance and damage. This is particularly true in a plant such as a paper or silk mill, where moisture arising in the machine room, finishing room, shipping room, screen room, grind¬ er room, jordan room, boiler house, or jigger dye house will cause excessive condensation and ceiling drip, with result¬ ant damage to paper, silk, or machinery. All such troubles are eliminated by the use HEAT TRANSMISSION THROUGH ROOFS B .t. u. transmitted for 1° Construction differencein temp.ofair in- side and out, per 24 hours. No. 1 Metropolitan Composition 4" thick with 5-ply Tar and Felts. 4.08 No. 2 Metropolitan Composition thick with 5-ply Tar and Felts. 4-55 No. 3 Metropolitan Composition 3" thick with 5-ply Tar and Felts. 5.14 No. 4 Hollow terra cotta tile 3" thick with 5-ply Tar and Felts. 8.35 No. 5 Stone Concrete 6" thick wi th 5-ply Tar and Felts. 11.7 No. 6 Cinder Concrete 4" thick with 5-ply Tar and Felts. 12.2 No. 7 Stone Concrete 4" thick with 5-ply Tar and Felts. 13 8 No. 8 Cinder Concrete 3" thick with 5-ply Tar and Felts. 14.1 No. 9 Stone Concrete 3" thick with 5-ply Tar and Felts. 15.2 No. 10 Asbestos Protected Metal yi" thick 23.7 No. 11 Stone Concrete 4" thick with 1" cork and 5-ply Tar and Felts. 5 .08 of the Metropolitan system. Striking proof is found in several large plants in Canada. Canada is cited as an illus¬ tration because of the very vigorous winters experienced there. In one north¬ ern plant it was found necessary to install a hung ceiling about 6' below the concrete roof of the Turbine room to prevent condensation. In 1914 this Company built their largest Turbine Station, in¬ stalling the Metropolitan System without the hung ceiling. With the temperature under the slab exceeding ioo° Fahr. and an outside temperature of 30° below zero, there has not been the slightest trace of condensation on the under side of the Metropolitan slab. REDUCTION OF HEATING COST With the exceptionally high insulating value of the Metropolitan slab it is clear there must be a considerable saving, not only on the first cost of installing the heating equipment, but also in the annual consumption of coal. As compared with cinder concrete in moderate climates, it has been estimated that Metropolitan construction saves ap¬ proximately 10% in the initial cost of the heating plant and from 20% to 25% in annual coal consumption. A typical instance is that of a Metro¬ politan Roof which saved the owners from 1,200 to 1,500 tons of coal per year while the heating plant bid was reduced by #1,000 on a building of approximately 50,000 feet roof area. In summer, when heating is not a factor, the Metropolitan slab insures a cooler building with greater comfort to the workmen. This is of great impor¬ tance in machine shops of all kinds. Machine Room, P. H. Glatfelter Co., Spring Grove, Pa. 4— Durability PRESERVATION OF STEEL WORK Metropolitan System Floors and Roofs have been in active service—under the most severe conditions—for over thirty- five years and are today, without excep¬ tion, in as good a condition as when installed. Gypsum, the principal ingre¬ dient of the Metropolitan composition, is recognized by authorities as better for the preservation of metal against corrosion than any other available fireproof ma¬ terial. Machine Room, Price Bros., Kenogami, £)ue. I I Corcoran Art Gallery, Washington, D. C. superiority, not only in point of fire resistance but in the non-conductivity of heat. The accompanying photograph, for instance, shows Metropolitan Construction which had been subjected to a week of sulphur fire with floors heavily loaded. As reported by the New York Board of Fire Underwriters—-“The floor system performed its function adequately as re¬ gards fire resistance . . . the floor panels, girders and beams resisted the fire well, considering the intense heat due to the long continued high tem¬ peratures from burning jute and sulphur.” More similar evidence can be provided. Re¬ sults of actual tests are given on pages 36 and 37. For the benefit of prominent engineers, build¬ ing code revision committees and others inves¬ tigating this subject, we have frequently cut out sections of Metropolitan Floors and Roofs which have been installed for many years. In every case , the embedded beams and girders , as well as the steel cables , have been found in perfect condition. This photograph of the Corcoran Art Gallery in Washington shows a twenty- year old job. 5—Fire Resistance In both roof and floor construction, the Metro¬ politan System has, in numerous scientific tests as well as in actual fires,clearly demonstrated its 48th Street and East River Warehouse, New York City 6 — Low Maintenance Elasticity is necessary to good floor and roof construction, particularly where heavy manu¬ facturing processes cause shocks, vibrations and unequal stresses. It is even more essential where columns supporting roof trusses must also carry heavy traveling cranes. The vibrations caused by cranes or other heavy-moving loads are certain to crack an in¬ elastic construction. The wood chips in the Metropolitan Compo¬ sition provide elasticity and Metropolitan Floors and Roofs remain intact under the severest con¬ ditions, thus eliminating the annoyance and ex¬ pense of constant repairs. There is a plant in New York subjected to un- unusually severe vibration. This is the building of the Garvin Machine Works where vibration from machinery subjects the floors and roofs to an exceptionally heavy and continuous strain. Metropolitan floors and roofs were installed 19 years ago. They are still in use and show no cracks. 7 — Replacement Not only is the Metropolitan System low in first cost; not only dees it insure economy in maintenance, but it provides the most satis¬ factory and economical system to install in buildings where the floor or roof are of other materials and must be replaced. The photo¬ graph on the next page shows such a Metro- politan installation. Our engineers will be glad to consult with you about any problems connected with floors or roofs. 8 — Service This company regards each contract as a sale of service in addition to the sale of material and workmanship. Nor is the delivery of service completed with acceptance of the contract. It is a service, in other words, which is ren¬ dered not only during the work but before and after its execution. Before starting work, for instance, our engi¬ neers will be glad to consult with you and to submit, without charge or obligation of any kind, their recommendations for the floor and roof construction of new buildings or for the alteration or replacement work in buddings now standing. During execution of the work they maintain a constant supervising service assuring you the greatest speed and economy and the strictest ad¬ herence to design and specifications. After completion of the work the interest of our entire organization is just as keen as when starting the job. Our records for service are more valuable to us than our trade-mark, patents, capital and surplus. We guard them jealously, and on completed jobs, whether one or thirty years after completion we stand always ready to serve to the fullest extent of our capacity. You may, for instance, wish to cut additional ventilators, skylights, stair wells or other open¬ ings in the Metropolitan Slab. Just let us know and a Metropolitan Engineer will call and super¬ vise the cutting, splicing and re-anchoring of the cables. You may wish to impose additional loads and a Metropolitan Engineer will tell you how this can be done. A system without a service is a ship without a pilot. We furnish you with both. 9 — Guaranteed Construction We do not license nor permit the installation of Metropolitan Floors and Roofs by any organ¬ ization other than our own Construction Depart¬ ment. With a carefully selected and trained personnel, this Department has an unequalled Disston Saw Works, Tacony, Fa. record for the rapid and efficient execution of contracts, regardless of location. Installation by our trained men, under thor¬ oughly competent foremen and superintendents, and frequent inspections by our Engineering De¬ partment carry to the engineer and owner a definite assurance of speedy construction and skilled workmanship while, through the organi¬ zation of our forces, we are able to install Metro¬ politan System Floors and Roofs at the absolute minimum cost. To this policy we attribute the fact that no Metropolitan Floor or Roof has ever failed in a test or an actual fire and because we take the full responsibility for the work we are able to make the accompanying guarantee. GUARANTEE We guarantee every square foot of Metropolitan Floor and Roof Construc¬ tion which we install against any defects in workmanship, material or design and against failure from any cause, under the conditions for which it is designed. 1 1 3 1 THE METROPOLITAN SYSTEM AS APPLIED TO FLOORS HE Metropolitan System is equally valuable X whether applied to floors or roofs. Fire resistance, for instance, is as important in one as in the other and so are safety, strength, economy in first cost and maintenance, rapidity of construction, non-conductivity, absence of condensation, reduction of heating costs, preservation of steel work and ability to stand up under vibration. It so happens, however, that some have heard of the Metropolitan System only in connection with roofs while others have heard of it only in connection with floors and it should, of course, be considered in both connections where either roofs or floors or both are to be built. In general, the method of application is the same in each case and differs only in structural details. For instance a floor slab supported on beams 6 ' apart in the clear , to support a total live and dead load of 200 lbs. per square foot must have cable spacing not more than i" on centre and the slab must be not less than thick, but a roof slab supported on purlins spaced 6' apart in the clear to support a total live and dead load of 52 lbs. per square foot must have cable spacing of 3" and slab 3" thick. (See page 39 for floor specifications.) The following pages illustrate the wide variety of buildings in which the Metropolitan System of floor and roof construction has been used. Some are recent jobs. Others have withstood the severest sort of service for several years. These give a practical demonstration of the durability ol the Metropolitan System of fireproof floor and roof construction, which has more than thirty years of continuous service behind it. [1+] State Office Building, Richmond, Va. Architects—Carneal & Johnson Builders—John T. Wilson Co., Inc. Richmond Trust Co., Richmond, Va. Architects—Starret & Van Vleck Builders—John T. Wilson Co., Inc. Completed in Eight Weeks State Office Building, Richmond, Va. Completed in Seven Weeks Richmond Trust Co., Richmond, Va. Dome, Marywood College, Scranton, Pa. Second Largest Span in U. S. Diameter of Dome, 76'-o n Marywood College, Scranton, Pa. [16] March 30th April 1st April 5th April 7th p a* Ui April 9th Swarthmore Apartments Philadelphia, Pa. Metropolitan floors completed at the rate of one p er d a y— a notable achievement in rapid construction. April 14th The Finished Building [17] ^METROPOLITAN % vSYSTEM J) \ '• -. FLOORS and ROOFS / hew YoiiKcrTL Thalheimer Store, Richmond, Va. Underside of floors when forms are removed Thalheimer Store, Richmond, Va. [18] Hiimiti r •* *.»> >« i a 1 'll £ * ' i m ?s* ( lUaiy^a. ml RH nil i um mu tat | tW* till UU 1 lilt Mil itU j tru mi Mil miu« im | «ii itii m> I i »«» i*tl ItU ! MM mi till j Hi* tm — | ; •«« ia» j I rru mi an j »ui tat m, i tm jtn | till till mi «M Mm Hit *JI HU *M wa mu tin \ U« I it I MU ! «il MM hA I «« Mil ftt| jgH£lt iltl »*Li .W ll ii ' lUi til tilt ] tm m Iiif i tm m mi mi lit tm mum mt UK m Hit mi *it im mi lit im umm* mi utt u» mi , »»i hi mi *»»» MatUl ' Alim mi tu iu Utt f -* >.t ..»» .■{.A* n M H MJtii. *•. 11 N » ** 1 I *" *•* U *1 »* *8 it Cl l II r: f Is It J|j| MM I V :f. It II * - M %• II t* n U if it, .. . - Ct U V _ „ I - 1 -Ulii It • • Li ij irii J --t6LJ ■M I! >* .11 l»ll .«« If" ■ H «« » ■llll" «i ri .< ill" >• mil" Urn iiiHf? Aero Photograph of New York City showing buildings using the Metropolitan System 1. Produce Exchange 1922 7. U. S. Food Products Bldg. ] 2. Hudson Bldg. 1897 8. Samson Bldg. 1897 3. 42 Broadway Bldg. 1899 9. Woodbridge Bldg. 1898 4. Liberty Tower (Block) 1912 10. Bishop Bldg. 1897 5. Atlantic Mutual Bldg. 1898 11. Beaver Bldg. 1900 6. 60 Wall Bldg. 1897 12. Home Insurance Bldg. 1900 I19] METROPOLITAN SYSTEM FlOOItS an n ROOFS J^EW Y0I1K crrt- Sauvegarde Life Insurance Bldg., Montreal, £)ue. Additional Story—Produce Exchange, New York, N. Y. [20] THE METROPOLITAN SYSTEM AS APPLIED TO ROOFS F OR a Metropolitan roof the slab may be thinner and the cables spaced farther apart than for floors, provided the total live and dead load capacity require¬ ments are such as to make this possible. (See page 39) In cases where desirable or necessary, wood sleepers may be toe nailed to the roof slab as well as to the floors. Nailing strips are recommended where tin, slate or other materials are to be applied. Many millions of square feet of Metropolitan Roof have been constructed in this country and in Canada. It is applicable to Flat Roofs, Monitor-type Roofs, Saw-tooth Roofs and every other known type of roof employed for office, industrial, commercial, residential and public buildings. In no case have these roofs tailed to give full satis¬ faction under the conditions for which they were designed. A number of different types serving in different localities under different conditions are illustrated on the following pages. You will, no doubt, find there a type similar to the type you contemplate building and we will be glad to refer you to hundreds of others. [ 21 ] [ 22] Naval Ordnance Plant, South Charleston, W. Va. Pipe and Jacket Shop, Baldwin Locomotive Works Eddystone, Pa. Repair Erecting Shop, American Locomotive Works Schenectady, N. Y. [ 23 ] - ''''O/,/ '/'‘metropolitan'^ SYSTEM flooi^and Roofs EW YOHK ClTY_ Ingot Mould Bldg., Bethlehem Steel Works South Bethlehem, Pa. Erecting Shop No. 2, Baldwin Locomotive Works Eddystone, Pa. [24l American Chain Company York, Pa. Finishing Building, Midvale Steel Co. Nicetovvn, Pa. [25] , METROPOLITAN SYSTEM ROOI $ an d ROC FS JjBW YORK CVtt. No. 6 Lap Weld Building and Mill Transept Building National Tube Co., Lorain, Ohio Power House, Standard Oil Co. Elizabeth, N. J. [26] Slone & Webster , Engineers Power Plant, Hartford Electric Light Co., Hartford, Cc Pantages Theatre, Toronto, Ont. [27] P. H. Glatfelter Co., Spring Grove, Pa. Abitibi Power & Paper Co., Iroquois Falls, Ont. 8] St. Maurice Pulp & Paper Co., Three Rivers, Que. St. Lawrence Pulp & Paper Co., Three Rivers, Cue. [29 ] Roof of Conveyor Gallery for Harbour Commission of Montreal, Que. U. S. Airplane Hangar, Langley Field, Hampton, Va. [30] TECHNICAL DATA ON THE METROPOLITAN SYSTEM TESTS AND REPORTS T HERE have been a considerable number of scien¬ tific tests conducted to determine the value of the Metropolitan composition in comparison with other fireproofing materials. These are supplemented by authoritative reports drawn up after the investigation of actual fires and other investigations made with regard to Metropolitan Floors and Roofs under actual service conditions. Extracts from certain of these tests and reports are quoted herewith and, in substantiation of our statement that the Metropolitan System is “The Fireproofing System with Thirty Years of Proof,” we will start with— The Earliest Reports on the METROPOLITAN SYSTEM Extracts from “The Fireproofing of Steel Buildings” BY J. K. FREITAG, C.E. Tests conducted in 1894 “In 1894 tests were made at Trenton, N. J., to determine the relative values of the flat-tile arch, the segmental-tile arch, and the Metropolitan type of suspended flooring. “Test-arch No. 1 consisted of a flat-tile arch, side- construction, 10-in. blocks, span 4 ft., 11 ^ ins. The load was applied at the quarter and three-quarter points of span. Tinder a total load of 6,689 lbs., or 301 lbs. per sq. ft., the joints commenced to open at the under side of the key block. Under a total load of L 311 Fig. 71. —Metropolitan Floor—Panelled Construction. 8,599 lbs., or 387 lbs. per sq. ft., the skew-backs were crushed and the arch was entirely destroyed. “Test Arch No. 2 was a segmental side-construction tile arch, span 5 ft. 2 ins., rise 6 ins., thickness 6 ins. Under a loading of 6,942 lbs., or 301 lbs. per sq. ft., the joints commenced to open, and at 9,492 lbs., or 411 lbs. per sq. ft., the skew-backs were broken as before. “For the test of the Metropolitan Floor, the slab used consisted of a mixture of five parts of plaster of Paris by weight to one part of wood shavings, with sufficient water to bring the mass to the consistency of thin paste. The wires used were spaced about one inch centers, hooked over the beam flanges. The arch¬ slab was 4 ins. thick, span 5 ft. A section of the arch 2 ft. 6p2 ins. long was cut out on the completion of the sample, and the whole of this detached area was loaded for the test. Cracks appeared under a load of 735 lbs. per sq. ft. Under a load of 1,200 lbs. per sq. ft., the deflection was 1 17/32 ins. “A test for impact was also made on a section of the Metropolitan floor, also a fire-test, for which an arch of 5 ft. 6 in. span was loaded to 200 lbs. per sq. ft. uniform load, with fire sustained directly beneath the arch for four hours. The results were considered highly satisfactory [3 U J. K. Freitag EXTRACTS FROM REPORT ON HEAT INSULATION VALUE OF METROPOLITAN COMPOSITION FLOORS By C. L. NORTON Roger’s Laboratory of Physics Massachusetts Institute of Technology Tests conducted from 1914 to 1916 “The effectiveness of a roof in prevent¬ ing the flow of heat through it is of im¬ portance mainly from two considerations. First, because a roof which is a good insulator saves cost of installation and operation of the heating plant, and second, because a roof of better insulating value is likely to become less trouble¬ some from condensation of moisture upon its under surface. “For the purpose of determining the general thermal properties of the Metro¬ politan System of Roofs, specimens of Metropolitan composition slabs were sub¬ mitted by the manufacturers, the Keystone Fireproofing Company of New York. Among the materials tested were the following: MATERIALS EXAMINED Metropolitan Composition Terra Cotta Hollow Tile Portland Cement Concrete Tar and Gravel Roofing Spruce Plank Oak Plank Compressed Sheet Cork Asbestos Protected Metal METHOD OF TESTING “Specimens of various sizes up to 48" square and 4 y 2 " in thickness were tested, and subsequently an experimental roof of concrete was built to check the values obtained with the smaller labora¬ tory specimens. This slab was made the roof, or cover, of a box whose floor and walls were built of thick sheet cork of known heat conductivity. Heat was supplied to the box electrically until the desired temperature difference between the air inside and outside of the box was reached. From the electrical supply and the known loss through the cork floor and walls, the amount of heat flowing out through the roof might be computed. RESULTS “With the apparatus described, two sets of physical constants were secured, one a series of values of the rate of heat flow through the solid substance of the roof slab, usually called the coefficient ot thermal conductivity; and second, a num¬ ber of values of the rate at which heat escapes from, or passes into, a surface, when the surface and the air surrounding it are at different temperatures. These latter values are usually referred to as the coefficient of emission or absorption, and so far as our experiments show the two coefficients are substantially alike, and will be considered to be identical under the conditions of these tests. “All of the values of coefficients in the tables are computed from observations made with temperature differences such as are common upon the surfaces of roofs and in the air in their immediate neigh¬ borhoods. For the surface coefficients. differences of five to ten degrees were used, and the conduction coefficient was based upon measurements made with differences of from ten degrees to one hundred and twenty. TABLE 1. COEFFICIENTS OF THERMAL CONDUCTIVITY B.t.u. per sq. ft. per i" thick, per Material l0 F. diff. in temp, of SURFACES per 24 hours Compressed sheet cork. 8 Spruce Plank . 18 Metropolitan Gypsum Slab. 20 Oak Plank.26 Roofing Paper and Pitch. . ... 33 Hollow Tile Terra Cotta. 40 Applies only to 3 " tile Cinder Concrete ..120 Stone Concrete. 150 Asbestos Protected Metal.196 (for y&" thickness) “The fig ures in Table 1 do not involve any consideration of the temperature of the air in contact with the surfaces, but merely the temperature of the surfaces themselves. “ I he temperatures of the surfaces just referred to are obtained from the results of an elaborate series of tests, the sum¬ mary of the results of which is given in Table 2 below. TABLE 2. COEFFICIENTS OF EMISSION Loss or gain of heat in B.t.u. per Nature of Surface S< 1 - ft- per 24 hours per i° F. dif¬ ference in temp.of air and of surface Compressed sheet cork. 36 Roofing Paper. 50 Concrete. 55 Metropolitan Composition. 57 Asbestos protected Metal. 34 Terra Cotta. ca “In order to compute the heat flow through any typical roof we must proceed along the line of the following example. Let us take the case of two slabs, A , a slab of Metropolitan Composition, and B, a slab of stone concrete, each 4" thick, and upon the surface of each a 5-ply built-up tar-and-felt roofing sheet thick. “. . . if heat Bowed through slab A at the rate of 1 B.t.u. per 24 hours per square foot, it is due to a temperature difference given by the following equation: - + - + — + 1 = .245° dif. air to air 57 20 33 50 and if a temperature difference of .245 in the air on the two sides of the roof will cause a flow of 1 B.t.u. then a tem¬ perature difference of i° will cause —-— = 4.08 B.t.u. •245 to flow. “Similarly the flow through slab B is 1 =13.8 B. t. u. for i° diff. air to air. + 4 (5 b GO + — + — 4 X 33 50 “The two values, 4.08 and 13.8 give the amount of heat which will pass through the two slabs under the same conditions, and show that as an insulator the Metro¬ politan roof is 3.39 times as effective as the concrete. “In this manner Table 3 has been com¬ puted, to show the relative values of some half dozen of the roofs tested.” (Table 3 is published on Page 10 of this Catalog) “From the values given in this table we may also estimate the actual loss through roofs of these types and may compute the actual saving in fuel, if we have reliable information as to average temperature conditions, and efficiency of heating plant.” CONDENSATION “1 he condensation of moisture on the under side of a roof begins when the sur¬ face has cooled down to what is called the dew-point. Hence we need to compute from our experimental values what the temperature of the lower face of a roof will be for different indoor and outdoor temperatures, if we wish to discuss the relative freedom from condensation of the several types of roof. ‘‘Let us refer again to slab A described earlier. Since we know the value of its coefficients we may show that the ratio of the temperature drop at the under sur¬ face to the entire temperature difference between the air inside and out, is I 57 - — .072° F, — + — + — + — 50 57 132 29 that is, for every degree temperatureMif- ference between the air inside and out the under surface of the roof will be .072° cooler than the air below it.” (The experimenter here inserts two plots for ease in com¬ putation and proceeds to the following conclusion:) “Let us take the case of the Metro¬ politan roof 4" thick with 5-ply top. We will assume, for example, that our room temperature is 75 0 F. and the humidity is 85%. From Plot 2 we find that the difference between the air temperature and the condensation point for these con¬ ditions is 5.1 0 F. when the difference be¬ tween the indoor and outdoor tempera¬ ture reaches 71 0 F. which corresponds to an outdoor temperature of 4 0 F. Similar deductions may be made from these plots in reverse order, to determine permissible humidity for fixed outdoor temperatures. “It will be noted from a consideration of Plots 1 and 2 that with an ordinary room temperature there is no possibility of condensation on the under side of a Met¬ ropolitan slab 3", 3 y 2 " or 4" thick so long as the humidity is less than 75%.” (Herewith are inserted still other examples and the experimenter concludes his report as follows:) “It is believed that the figures given and the examples outlined show conclu¬ sively the very great effectiveness of the Metropolitan Gypsum Composition roof slabs in preventing loss of heat, and in greatly diminishing the liability to con¬ densation existing in roofs of less insulat¬ ing value. Respectfully submitted, (Signed) C. L. Norton.” (The extracts presented here are verbatim transcriptions from Prof. Norton’s report. Space does not permit re¬ printing this report in full. A complete copy will be sent on request to all who are interested.) Condensation Plots Nos. i and 2 FIRE TESTS FOR BUREAU OF BUILDINGS NEW YORK CITY M ETROPOLITAN Floor Construc¬ tion was tested with fire and water by the representatives of the New York Building Department. The following ex¬ tracts from their report show the program of the test and the results that were noted. PROGRAM OF FIRE AND WATER TEST “Fire to be applied continuously for 5 hours. A temperature of 2000 to 2100 deg. Fahr. to be maintained for the last 4 hours, endeavoring to secure at one interval, if possible, a temperature of 2200 deg. Fahr. “At the expiration of 5 hours, water to be applied through a 1 pi" nozzle with 60 lbs. pressure to the interior for 15 min¬ utes; during the first 5 minutes of which water to be directed against the ceiling, and during the remaining 10 minutes against the walls and ceiling, principally the latter. Then the water to be shut off on the inside and applied to the top of the floor for 5 minutes under a low pressure, flooding same, and again returning to the inside of the structure and applied to grates to entirely extinguish fire.” EFFECTS OF FIRE AND WATER TEST “The beam protection on the two center beams was gone except for a short dis¬ tance at each end of beam. It was no¬ ticed that the paint zvas still to be seen on these beams in the places where the beam protection had come off. Material of arch between beams was washed away in some places so as to expose wire cables. A piece of material was removed from around lower flange of beam, and it was here observed that in these pieces all combustible material such as wood chips and cocoanut fibre, were burned in the lower region, charred in the central part and nearly intact in the region in contact with the beam. The material in center bay where stream of water did not reach was soft to a certain depth penetrated by a shaft stick to a depth varying between 1" and iK".’’ 600-POUND LOAD TEST “The center bay of the floor was loaded with pig-iron, evenly distributed over whole area between beams, to 600 lbs. per square foot. The load was so placed that none of it came directly on the beams. From readings taken before and 48 hours after the application of the load it was found that the center of bay had deflected .26 of an inch.” PERMANENT SET OF BEAMS “After fire and water and load test the upper flange of the two center beams was stripped of all material and the permanent deflection of same measured and found to be: For the north beam, none; for the south beam, none.” Fire Test, New York, N. Y. (Full report of these tests on request) LOAD, FIRE AND WATER TEST Made by HAROLD PERRINE, G. E. Columbia University, New York City T HE structure, as well as the method used in the herein described test, conform with the specifications for such test required by By-Law 6401 of the Building Code of the City of Toronto, Canada.” PURPOSE OF THE TEST “The purpose of the test is to deter¬ mine the effect of a continuous fire below the floor, lasting three hours, at an aver¬ age temperature of 1700° Fahr., a tem¬ perature generally conceded to be that of a burning building, the floor carrying at the same time a distributed load of 125 lbs. per square foot. At the end of the three hours the under side of the roof, while still red hot, is subjected to 1 yi" stream of cold water through a hose at close range, under a 60 lb. pressure, for five minutes; the upper side of the floor is then flooded with water at a low pres¬ sure, and afterward the stream is applied at full pressure to the under side for five minutes longer. Deflections of beams and floor are measured continuously dur¬ ing test. The load is then increased to 286 lbs. per square foot, allowed to cool thoroughly and deflections noted.” RESULTS OF TEST Effect of Working Load : ‘‘No appreciable deflection was noted under initial or working load, i.e., 125 lbs. per square foot.” Effect of Fire and Water: “The combined effect of fire and water was to remove the plaster almost entirely from the under side of the test slab, leav¬ ing only that portion which could not be readily reached by the stream, owing to its proximity to the front wall. Through¬ out the area where the plaster did not adhere, the Metropolitan mixture was re¬ moved to a depth of from A 2" to 1 jT”, exposing approximately the central two feet of the length of each cable.” “No cracks appeared on the upper side of the system nor did any flame, smoke or water pass through at any time. “The conducted heat, as measured by the bare bulb of a mercury thermometer placed in contact with the cinder concrete fill at intervals during the fire, was found to be no greater than the recorded out¬ side air temperature. “During the fire the total corrected de¬ flection of the center slab was %{ 2 ".” Effect of Cooling: “The arch recovered 14 2 " on cooling.” Effect of Load: “A total load of 286 lbs. per square foot produced a deflection of 17 A>A On release of load the arch recovered until the deflection reading was 1 l{ 2 ■" No other effects were noted during this loading.” (Complete report sent upon request) [37] METROPOLITAN ^ SYSTEM TABLE OE TOTAL LOADS METROPOLITAN SYSTEM OF FIREPROOF FLOOR AND ROOF CONSTRUCTION Cables composed of 2-No. 12 Cold Drawn Galvanized Steel Wires Twisted Cable-2x.00874 @20000*°"= 3 50* 20000*°” w ~ b'TITL NO. 12. ROOFS SLAB THICKNESS CABLE 5PACING CLEAR DISTANCE BETWEE M FLANGES OF BEAMS 3- e" 4‘-0" 4'-6" 5-0" 5-6" 6‘-o" 6-6“| 7-0" 7-6" 6-0" 8-6" 9-0* 9-6* 10-0" 3 1 4-50 345 2 73 22 1 183 154 131 1 1 14 1/4 360 2 76 218 1 77 147 P4 105 91 I'/Z 30 1 230 182 147 123 103 88 76 PA 258 1 97 156 126 104 88 75 65 2 225 1 72 137 IIP 22. Z2 65 57 2/4 200 153 122 99 82 68 58 51 2/2 1 80 138 109 88 74 61 53 46 ?%- 164 1 25 100 SL 67 57 48 41 3 1 50 1 1 •> 91 74 61 441 3ft •r { 1 556 430 340 275 227 193 165 141 124 1 09 | 96 1/4 445 343 2 72 220 182 1 54 1 32 1 13 99 87 77 1 '/2 370 285 226 184 152 1 28 1 1 0 95 82 7 3 1 64 P/4 31 7 245 192 155 130 1 10 94 82 7 1 62 55 3| 2 278 2 1 5 169 138 1 14 96 82 71 61 55 48 2/4 247 1 8 1 1.50 123 1 02 65 73 63 54 49 42 2/2 2 22 1 7 1 136 1 1 0 2i 77 66 57 50 44 38 2 3 A 202 1 55 124 101 83 70 59 52 45 39 35 3 185 1 43 1 13 92 76 64 55 47 41 36 1 32 METROPOLITAN COMPOSITION WEIGHS 5 LBS. PER SQUARE FOOT BY ONE INCH IN THICKNESS ROOFS SLAB TMICKNES5 CABLE SPACING 3-6" 4-0” 4-6“ 5-0" 5-6" 6-0" 6-6* 7^0” 7-6" 8-0" 8-6" 9-0" 9-6” 10-0" FLOORS A 1 6 58 508 40 3 330 270 230 195 169 148 129 115 102 93 83 1/4 527 406 322 264 2 1 6 184 156 1 35 1 18 103 91 82 75 67 IV? 438 338 268 2 20 180 153 130 1 12 98 86 1 77 69 62 56 P/4 376 29 0 230 188 154 131 1 1 1 97 84 74 66 59 53 48 2 , 328 2 54 201 165 135 1 1 5 98 84 74 64 1 57 5 2 46 41 l 1 2/4 292 226 178 147 1 20 102 87 75 65 57 1 51 46 41 37 2/2 264 2 03 165 13 1 108 91 78 67 58 52 46 41 37 34 2 3 /4 240 185 147 1 20 98 83 71 61 54 47 42 37 34 31 ft> 2 1 9 169 134 1 1 0 90 77 65 57 49 4ft 38 35 31 28 1 757 58 3 466 38 2 3 13 264 226 195 172 150 134 120 107 97 1/4 605 46 7 37 3 305 251 ? 1 2 181 155 137 121 1 107 96 86 - - 7 ft 1/2 505 389 3 1 0 255 209 1 77 150 1 30 1 14 101 89 79 72 64 m 432 334 266 218 179 151 129 1 1 1 98 86 77 69 61 56 2 378 292 233 190 157 132 1 1 3 97 85 76 1 67 60 54 48 2/4 .336 260 207 169 140 1 1 8 10 1 86 76 67/ 59 54 48 43 ?'/2 303 2 34 18 6 152 1 26 1 06 90 78 68 60 1 54 48 43 38 234 275 2 13 170 139 1 1 4 96 82 7 1 62 56 49 43 39 35 3 252 1 94 15 5 127 1 04 88 7-? 65 57 50 45 40 35 32 3 L 853 660 528 43 3 358 302 259 7 24 196 173 153 136 122 1 1 1 1/4 682 528 423 347 286 242 207 1 79 156 138 1 123 109 98 89 1/2 569 441 35 2 288 239 20 1 172 1 50 130 1 15 102 91 81 74 PA 487 378 302 247 205 1 72 147 128 1 1 1 98 87 78 70 63 2 427 3 30 264 2 1 6 179 151 129 1 1 2 98 86 77 68 61 56 2/4 380 2 94 235 193 1 5.9 1 34 1 I 5 100 86 77 68 60 55 50 2 ^ 341 265 2 1 2 1 73 144 120 104 90 78 69 6 1 55 49 44 23/4 3 1 0 241 1 92 157 130 109 94 82 71 62 j 56 50 45 40 3 284 2 20 1 76 144 1 20 101 86 7 5 65 58 51 45 41 37 /IMs 1 944 738 592 483 402 340 290 252 220 193 171 153 138 125 e 1 1032 807 64 8 531 442 3 74 321 2 78 243 2 14 190 170 153 P8... [38] SPECIFICATIONS FOR METROPOLITAN SYSTEM OF FLOORS AND ROOFS C ABLES, each composed of two No. 12 (or equivalent) galvanized wires twisted, shall be carried over the tops of the beams or purlins to outside wall beams or end purlins and be secured to them by strong anchors. These cables shall be laid parallel 1" to 3" apart, according to spans and loads, and shall pass under round iron bars, midway between the purlins, so as to cause the cables to deflect uni¬ formly. Forms or centers shall be put in place about 1 " below the round iron bars shown above. I be Metropolitan Composition shall then be poured in place, and brought to an even surface about " above the top of the beams, forming a slab ready to receive sleeper fill or grading, and with the underside left as smooth as practicable. Fireproofing beams and girders (not trusses) with 2" on bottom flange and 1 y 2 " on sides. The slab shall be designed to carry safely the live load with a factor of safety of four. i : . ■■**■■■ ...... ..... - -U/T-. -- -- t K t A ( c -ri 1 Zz under sleet / % ^sTeel def/ection rod , Metropolitan Composition - -^-- 1 FORM “C” C ABLES, each composed of two No. 12 (or equivalent) galvanized wires twisted, shall be carried over the tops of the beams or purlins to outside wall beams or purlins, and be secured to them by strong anchors. These cables shall be laid parallel 1 " to 3" apart, ac¬ cording to spans and loads, and shall pass under round iron bars, midway between the purlins, so as to cause the cables to deflect uniformly. Forms or centers shall be put in place (by our¬ selves) about 1 " below the round iron bars shown above. The Metropolitan Composition shall then be poured in place, and brought to an even surface about x /i” above the tops of the beams, forming a slab ready to receive finished roofing or grading, and with the underside left as smooth as practicable. The slab shall be designed to carry safely the live load with a factor of safety of four. [ 39 ] 'S . . Q * * k .\J ^> N £ 1 0 } > ° 4 ; 31 Si Q> I' I t I § x I J3 *$ l | 4 ,§ I IS S INFORMATION FOR DESIGNING OUR ENGINEERING DEPARTMENT HE services of our Engineering Department are at all times at the command of our customers or prospective customers who may be designing or contemplating our construction. We earnestly recommend that our Engineering Department be consulted before the steel design lor your next building is completed. We will gladly send one of our engineers to confer with you—and it will place you under neither expense nor obligation. The designs shown on this and subsequent pages are of more or less standard types—they do not reflect any limitation of the adaptability of the Metropolitan System. ALLOWABLE SPANS ETROPOLITAN Roof Construction can be installed between supports spaced up to io feet in the clear. Under usual conditions, considering the steel work and the floor and roof construction together, our experience has shown the most economical spacing to be from 6' to 7'. For saw-tooth roofs, an extremely simple, economical and efficient design is shown on page 43, the cables being supported by trusses, no purlins being required. WATERPROOFING A LL the approved methods of waterproofing _ have been successfully applied to the Metropolitan slab. This includes what is com¬ monly known as slag, gravel, built-up-asbestos- waterproofing, tin, slate, shingles or tile. The waterproofing should be specified to cover the curbs, the vertical ends of the saw-teeth or monitors, unless these portions are entirely covered by flashing. The Metropolitan slab appeals to the roofing contractor because of its true and even surface on top, and on account of the fact that it will hold nails. The fact that it will hold nails should be taken into consideration by contractors bid¬ ding on waterproofing. Those experienced with waterproofing Metropolitan slabs usually quote a lower price than where their work is to be applied to other types of fireproof construction. GRADING HERE there are long stretches of roof to be drained, this can usually be done most economically by designing the steel to take care of the fall. Very frequently such a steel design involves considerable tedious detailing in fabri¬ cation as well as erection. In such cases it is better to specify the grading to be done with Metropolitan composition as the slab is poured, or afterward. UNDERNEATH FINISH NLIKE concrete, where the aggregate, con¬ sisting of stone, slag or cinders, leaves more or less voids on the underside, Metropolitan slab presents a hard, even and practically smooth surface, which can be painted readily when the slab has become dry. This should not, however, be misunderstood to carry the impression that the underneath finish will approximate in appearance a plastered ceil¬ ing. Although tongue-and-grooved, dressed 1 u m ber is used for the form work, and the same carefully fitted, the outline of the boards will show on the underside of the slab. [41J -Continuous Angfe Alternate Block Curb Cab : es to anchor to end pur.'/n , Rod reinforcement to be hooted ' oner bo*h the arg'e and the beam Con / Antjh Standard Sawtooth Tbuss with Puquns shomng details of Metropolitan System of Fireproof Roof Construction Keystone Gypsum Ere proofing Corporation /6 utrapAnchorj /Z‘oc r /'•£■/,5'oc 1 _ . Continuous Angle filter™* Cables to she bar to this pur/m Curb to be reinforced mth Rods or Meta! Lath Cables to anchor to pur tin and orerhang to be reinforced " } Flashing^, Nailing Strip! — Continuous frg!ep\ Standard Monitor Truss sh?w-g de*a> 's o~ ■Metropolitan System of Fireproof [Roof Construction Keystone Gypsum Fireproofing Corvorsf/or t+Rod Meifopcutan Co mposition y Cables hed to / Pod Cates to a~c ns.' on end aur'sr V, Ore-hang *o be remTorcee m JPods - ■ / ry GC’^ s HOCUS filing Continuous Tee or Angles Continuous Angle Tie fo be used with inclined /see s&rv/po/h Stamdabd Sawtooth with Vertical ob Inclined Face showing details of Metropolitan System of Fuse proof Roof _ Cqnstr/jc tion Keystone Gypsum Fireproofing- Corporation WMM/MM failing Strip fail my Strip '.Continuous uAnyle- Continuous Tee or Angles ; as ■ r/NJSH of Slab at jEmp of Sawteeth Continuous Ang'e Standaqd Vertical Face Sawtooth showng^d^3j^0^ Metropolitan System of Fireproof Roof Construction Keystone Gypsum Fireproofing Corporation [43 ] METROPOLITAN SYSTEM FLOORS and HOOFS Nch Wd/erprooftny Mcmbrdnc. Thoroughly Dry Insulating (/ypium Block- Thoroughly Dry Tnou/chng Fibre. Existing Wdcrproofing Mcmbrdnc. Concrete, Tile, or Olher Mdlerul forming Existing Boo/ Deck THE FRANK SYSTEM Of ROOF INSULATION OVER. ErXISTlNQ ROOF CONSTRUCTION £ £ UMBRELLA BHED I 44) 1 I * TYPICAL 3CCTIOH TH/SO CttC/Nf Lf TYPICAL SPUCC CONN. dcta/l or r/eepeoor/NQ reujj STANDARD PE.ATT TR.U 33 . 3MOWIN^ MTAILS METROPOLITAN SYSTEM OF FIREPROOF ROOF AND CEILING CONSTRUCTION 5FCT/ON THRO FLOOR OR ROOF. ~Rr~£, j * £ v o'-T .ijlur ill METROPOLITAN 5Y5T£M ON WOOD OR CONCRETE BEAM5. A WOLF /ROW 3 OR R/PF 3 TBUTJ 'STANDA^D'MON ITO^'P/PE' Showing- Panel Bracing. -fd-fcXRQ-ELQ i-1TAN gJOQF 51A& -,. NOT Cl Where there are/oar or /ejj pane/s do not aye /he type of hraerny shown on paye hat use eny/e iron or pipe y/ra/y If any/e irons are /o he used /hey should he we faded in /he structure.' y/eef contract If pipe y/ra/y sre io he use /hea yhoa/d on fan ro, he me fa dedin /he Ple/ropo. ■00/ s/ah eonfraet INSTALLATIONS Some of the Buildings in the United States which have employed THE METROPOLITAN SYSTEM GOVERNMENT WORK AND SHIPBUILDING PLANTS Naval Ordnance Plant, South Charleston, W. Va. Dirigible Hangar, Langley Field, Va. Ten Magazine Buildings, Naval Mine Depot, Yorktown, Va. Boiler Plant . Men’s Toilet and Locker Building, Electric Station Finishing Machine Shop Rough Machine Shop Electrical Shop, Bethlehem Shipbuilding Corp., Sparrows Point, Md. Boiler Makers’ Shop, Washington Navy Yard, Washington, D. C. Foundry, Pusey-Jones Shipbuilding Co., Wilmington, Del. Foundry, U. S. Navy Yard, League Island, Philadelphia, Pa. Projectile Plant, U. S. Government, Charleston, W. Va. Stable and Garage, U. S. Navy Yard, League Island, Philadelphia, Pa. Mold Loft, Pusey-Jones Ship Building Co., Wilmington, Del. Compressor Building, U. S. Cold Storage Plant, Hampton Roads, Va. Machine Shop, Pusey-Jones Ship Build¬ ing Co., Wilmington, Del. Mold Loft Extension, Pusey-Jones Ship- ing Co., Wilmington, Del. Machine and Tool Shop, Pusey-Jones Ship Building Co., Wilmington, Del.. U. S. Structural Shop, U. S. Govern¬ ment, Norfolk, Va. Mold Loft and Punch Shop, Pusey-Jones Ship Building Co., Wilmington, Del. No. 2 Mold Loft and Punch Shop, Pusey-Jones Ship Building Co. Power Plant, U. S. Naval Training Station, Newport, R. I. Building No. 1, 2 and .1, Pennsylvania Ship Building Co., Gloucester, N. J... Machine and Boiler Shop, New Jersey Ship Building Co., Gloucester, N. J... Building No. 1, 2 and 3, New Jersey Ship Building Co., Gloucester, N. J.. Office Building, New Jersey Ship Build¬ ing Co., Gloucester, N. J. Joiner Shop, New Jersey Ship Building Co., Gloucester, N. J. Compressor Rooms, New Jersey Ship Building Co., Gloucester, N. J. No. 2 Extension Machine and Boiler Shops, New Jersey Ship Bldg. Co., Gloucester, N. J. Garage and Sub-Station, New Jersey Ship Building Co., Gloucester, N. J... Gas Booster, New Jersey Ship Building Co., Gloucester, N. J. Emergency Hospital, New Jersey Ship Building Co., Gloucester, N. J. Group of Hangar Buildings for the U. S. Government, New Dorp, S. I. Extension “A” to Power Plant, Brooklyn Navy Yard, New York City. Central Power Plant, Hampton Roads, Va. Navy Department, Bureau of Yards and Docks Army Department, Construction Division Bureau of Yards and Docks U. S. Gun Plant, Midvale Steel & Ord. Co. Nicetown, Pa. Barclay White & Co. Philadelphia, Pa. Aberthaw Construction Co., Sparrows Point, Md. Bureau of Yards and Docks Geo. F. Pawling Co. Philadelphia, Pa. Bureau of Yards and Docks, Warren,Moore & Co., Cntrs. Bureau of Yards and Docks, Warren,Moore & Co., Cntrs. Bureau of Yards and Docks, Warren,Moore & Co., Cntrs. Geo. F. Pawling Co. Philadelphia, Pa. Bureau of Yards and Docks, Cramp & Co., Contractors Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co. Philadelphia, Pa. Bureau of Yards and Docks, Geo. E. Wyne, Contractor Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co. Philadelphia, Pa. Bureau of Yards and Docks Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co. Philadelphia, Pa. Geo. F. Pawling Co., Philadelphia, Pa. Geo. F. Pawling Co., Philadelphia. Pa. Geo. F. Pawling Co., Philadelphia, Pa. Geo. F. Pawling Co., Philadelphia, Pa. Geo. F. Pawling Co., Philadelphia, Pa. Construction Division, U. S. Army, Wash., D. C. Bureau of Yards and Docks, Washington, D. C. Bureau of Yards and Docks, Washington, D. C. Proof Shop, Washington Navy Yard, Washington, D. C. Machine Shop, Globe Shipbuilding and Dry Dock Co., Fairfield, Md. Power House for Gallinger Hospital, Washington, D. C. Bureau of Yards and Docks, Washington, D. C. H. B. Myers, Washington, D. C. Municipal Architect, Washington, D. C. MANUFACTURING AND POWER PLANTS Locomotive and Transformer House, American Brass Co. Shed Extension, Jones & Lamson Machine Co., Springfield, Vt. Sub-Station, Crown Cork and Seal Co., Baltimore, Md. Treating House, Washington Steel & Ordnance Co., Uniontown, D. C. Building S, Morgan & Wright, Detroit, Mich. Shops, Kuhlman Car Shops, Cleveland, Ohio . Boiler House, Kuhlman Car Shops, Cleveland, Ohio . Plant, Highwood Co., Hamden, Conn. Shops, West Jersey & Seashore R. R. Co., Atlantic City, N. J. Plant, American Locomotive Co., Chicopee, Mass. Foundry, Farrel Foundry & Machine Co., Ansonia, Conn. Boiler House, Naumkeag Cotton Co., Salem, Mass. Power House, Salmon River Power Co., Altmar, N. Y. Fred Hart Machine Works, Poughkeepsie, N. Y. Building, Pierce Arrow Motor Car Co., Buffalo, N. Y. Milk Depot, Tait Bros., Springfield, Mass. Building No. 33, General Electric Co., Pittsfield, Mass. Building No. 19, General Electric Co., Pittsfield, Mass. Boiler House, Beacon Light Co., Chester, Pa. Turbine Room, Beacon Light Co., Chester, Pa. Boiler House, Philadelphia Electric Co., Tacony, Pa. Shops, L. & N. E. Ry Co., Pen Argyl, Pa. Ash Handling Building, General Electric Co., Philadelphia, Pa. Plant, J. H. Williams Co., Buffalo, N. Y. Hardening Mill, J. H. Williams Co., Buffalo, N. Y. Extension to Hammer Shop, J. H. Williams Co., Buffalo, N. Y. Extension to Hardening Building, J. H. Williams Co., Buffalo, N. Y. Buildings, J. H. Williams Co., Buffalo, N. Y. Stock Finishing and Pickling Bldgs., J. H. Williams Co., Buffalo, N. Y.. Extension to J. H. Williams Co.’s Plant, Buffalo, N. Y. Sperry Engineering Co., New Haven, Conn. Plant Engineer, Mr. Perry Otto G. Simonson, Baltimore, Md. Plant Engineer Lockwood, Greene & Co., Chicago, Ill. Westinghouse, Church, Kerr Co., New York City Westinghouse, Church, Kerr Co., New York City Lockwood, Gretme & Co., Boston, Mass. Stern & Silverman, Philadelphia, Pa. Plant Engineer Aberthaw Const. Co., Boston, Mass. New England Concrete Const Co., Boston, Mass. Erie Const Co., Buffalo, N. Y. John W. Ferguson Co., Paterson, N. J. Aberthaw Const. Co., Boston, Mass. Tait Bros., Springfield, Mass. M. M. Thrane, Chief Engineer M. M. Thrane, Chief Engineer Philadelphia Electric Co., Philadelphia, Pa. Philadelphia Electric Co., Philadelphia, Pa. Philadelphia Electric Co., Philadelphia, Pa. F. W. Gilcrest, Ch. Engr., So. , Bethlehem, Pa. Plant Engineer J. W. Ferguson Co., Paterson, N. J. J. W. Ferguson Co., Paterson, N. J. J. W. Ferguson Co., Paterson, N. J. J. W. Ferguson Co., Paterson, N. J. J. W. Ferguson Co., Paterson, N. J. J. W. Feiguson Co., Paterson, N. J. J. W. Ferguson Co., Paterson, N. J. [46] Factory Building, A. O. Norton, Inc., Roxbury, Mass. Machine Shops, Milton Mfg. Co., Milton, Pa. Boiler House, Worth Bros., Coatesville, Pa. Machine and Blacksmith Shops, Worth Bros., Coatesville, Pa. Locker Room, Electric Storage Battery Co., Philadelphia, Pa. Plant, Victor Box Manufacturing Co., Quakertown, Pa. Erecting Shop, Simplex Auto Co. New Brunswick, N. J. New Machine Shop, Simplex Auto Co., New Brunswick, N. J. Laboratory, Simplex Auto Co., New Brunswick, N. J. Pattern Storage, Empire Foundry Co., New Brunswick, N. J. Pent House Add., N. Y. Transportation Co., New York City. Power House, No. 2—Raritan Copper Works, Perth Amboy, N. J. Alteration, Raritan’s Copper Co.’s Plant, Perth Amboy, N. J. Two Tank Houses, New York City. Electric Plant Add., Hydraulic Race Co., Lockport, N. Y. Buildings, Jones & Lamson Machine Co., Springfield, Mass. Plant, Bristol Brass Co., Bristol, Conn. Power Plant, Lorain County Electric Co., Lorain, Ohio. Warehouse and Machine Shops, Pitts¬ burgh Coal Co., Library, Pa. Warehouse, Gulf Refining Co., Shadyside, Pa. Power Plant, Milton, Pa. Machine Shop, Pennsylvania R. R. Co., Pitcairn, Pa. Boiler Shop, Washington Gas Light Co., Washington, D. C. Mill No. S, Crocker-Burbank Co., Fitchburg, Mass. Carpenter Shop, Heppenstall Forge & Knife Co., Pittsburgh, Pa. Machine Shop, Westinghouse Electric & Machine Co., Pittsburgh, Pa. Freihofer Bakery, Philadelphia, Pa. Power Plant and Manufacturing Bldg., Philadelphia, Pa. Building for Dill & Collins Co., Philadelphia, Pa. Machine Shop, Landis Machine Co., Waynesboro, Pa. Building No. 1 and 2, Enterprise Manufacturing Co., Philadelphia, Pa.. Roof of Electric Plant, Philadelphia & Suburban Gas & Electric Co., Cromby, Pa. Manufacturing Buildings, Griswold Worsted Mills, Darby, Pa. Building for Carver File Co., Bridesburg, Pa. Power Machine Bldg., DeLaval Separa¬ tor Co., Poughkeepsie, N. Y. Building for American La France Fire Engine Co., Bloomfield, N. J. Pipe Fitting Warehouse, Philadelphia, Pa. Manufacturing Building, Diamond Match Co., Barberton, Ohio. Paper Mill, Fitzdale Paper Co., Fitzdale, Vt. New Buildings, American Chain Co., York, Pa. Boiler Room, Locke Insulator Co., Baltimore, Md. Jas. T. Ball, Boston, Mass. Phoenix Bridge Co., Phoenixville, Pa. Irwin & Leighton, Philadelphia, Pa. Irwin & Leighton, Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Kerr Dodge, Philadelphia, Pa. Westinghouse, Church, Kerr Co., New York City Westinghouse, Church, Kerr Co., New York City Westinghouse, Church, Kerr Co., New York City WCstinghouse, Church, Kerr Co., New York City Jas. C. McGuire & Co., New York City Plant Engineer, Mr. Fulton Plant Engineer, Mr. Fulton Harry B. Mulliken, New York City L. H. Kunhardt, Boston, Mass. New England Structural Steel Co., Boston, Mass. Levering & Garrigues, New York City Utilities Construction Co., Toledo, Ohio Hughes-Foulkrod Co., Pittsburgh, Pa. Hughes-Foulkrod Co., Pittsburgh, Pa. Willard Case Co., New York City Irwin & Leighton, Philadelphia, Pa. Washington Gas Light Co., Washington, D. C. Geo. F. Hardy Co., New York City Plant Engineer Plant Engineer H. Childs Hidgens, Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Plant Engineer Wm. Steele & Sons Co., Philadelphia, Pa. Plant Engineer Turner Construction Co., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. J. W. Ferguson Co., Paterson, N. J. Starrett & Van Vleck, New York City Wm. E. Hale, Philadelphia, Pa. Turner Construction Co., Buffalo, N. Y. Geo. F. Hardy Co., New York City Plant Engineer Parker, Thomas & Rice, Baltimore, Md. New Buildings, Fitchburg Paper Co., West Fitchburg, Mass. Power Plant, Carver File Co., Bridesburg, Pa. South Meadow Station, Hartford Elec¬ tric Light Co., Hartford, Conn. Commercial Truck Building, Philadelphia, Pa. Silk Mill, American Cellulose N Chemical Co., Cumberland, Md. Switchboard Room, Charlottesville & Albemarle R. R., CharlottesvilL, Va. . Manufacturing Building, The Porcupine Co., Fairfield, Conn. Power House, Henry Ford Co., Green Island, N. Y. Power Plant, Marywood College, Scranton, Pa. Gas Producer Building, Ward Baking Co., Ampere, N. J. New Bleachery for J. & P. Coats, Inc., Pawtucket, R. I. New Foundry Building, H. S. B. W. Cochrane Corp., Earnest, Pa. Kiln Building, Clay Products Corp. of America, New Hope, Pa. Extension to Beater Room, Chester Paper Co., Chester, Pa. Roof, International Harvester Co., Philadelphia, Pa. Buildings, Kiechkefer Container Co., Delair, N. J. Buildings, A. W. Jack Corp., Lockport, N. Y. Queen Lane Pumping Station, Philadelphia, Pa. Factory Building, Krook Co., Manayunk, Pa. Machine Room Roof, Schmidt & Ault Co., York, Pa. Structural Shop, Bauman Iron Works, Reading, Pa. Building for Ault & Wiborg, Jersey City, N. J. Power House, Berwind White Co., Windber, Pa. Three Bay Extension Mine No. 34, Auxiliary Power Plant, Windber, Pa. . Factory for Wm. & Plarvey Rowland, Philadelphia, Pa.'. Addition to William & Harvey Rowland Plant, Philadelphia, Pa. Building No. 14, David Lupton & Sons, Philadelphia^ Pa.. Building No. 17, David Lupton & Sons, Philadelphia, Pa. Building No. 15. David Lupton & Sons, Philadelphia, Pa. Extension to Building No. 17, David Lupton & Sons, Philadelphia, Pa. Transformer Buildings, Lukens Steel Co., Coatesville, Pa.. Service Building, White Motor Co., Philadelphia, Pa. Foundry, Penn. Seaboard Steel Corp., Chester, Pa. Building No. 2, Belfield Co., Philadelphia, Pa. Harrisburg Pipe & Pipe Bending Co., Harrisburg, Pa. Furnace House, J, T. Lewis Co., Philadelphia, Pa. Additions, J. T. Lewis Co., Philadelphia, Pa. Roof of Furnace House for J. T. Lewis Co., Philadelphia, Pa. Extension to Furnace House, for J. T. Lewis Co., Philadelphia, Pa. Storage Shed, James Campbell Co., Camden, N. J. Plant, Whitney Blake Wire Co., Hamden, Conn. Machine and Blacksmith Shops, Lenoir Car Works, Lenoir City, Tenn. Buildings, Ford & Kendig, Conshohocken, Pa. Geo. F. Hardy Co., New York City Wm. Steele & Sons Co., Philadelphia, Pa. Stone & Webster, Boston, Mass. Wm. Steele & Sons, Philadelphia, Pa. Plant Engineer Company’s Engineer Fletcher-Thompson Co., Bridgeport, Conn. Stone & Webster, Boston, Mass. J. J. Howley, Scranton, Pa. C. B. Comstock, New York City Plant Engineer McClintic-Marshall Co., Philadelphia, Pa. Belmont Iron Works, Philadelphia, Pa. Plant Engineer W. D. Price, Philadelphia, Pa. Irwin & Leighton, Philadelphia, Pa. Geo. F. Hardy Co., New York City City of Philadelphia, Pa. John Cantler Plant Engineer Muhlenberg Bros., Reading, Pa. L. H. Hornum Berwind White Coal Min¬ ing Co., Philadelphia, Pa. Berwind White Coal Min¬ ing Co., Pniladelphia, Pa. Irwin & Leighotn, Philadelphia, Pa. Irwin & Leighotn, Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Plant Engineer Watson Eng. Co., Cleveland, Ohio Belmont Iron Wks., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Austin Co. Philadelphia, Pa. Turner Concrete Steel Co., Philadelphia, Pa. Turner Concrete Steel Co., Philadelphia, Pa. Turner Concrete Steel Co., Philadelphia, Pa. Turner Concrete Steel Co., Philadelphia, Pa. Irwin & Leighton Co., Philadelphia, Pa. Sperry Eng. Co., New Haven, Conn. H. W. Hesselbach, Arch., Southern Rwy. Co. Wm. Steele & Sons Co., Philadelphia, Pa. [47] Office Addition, Belmont Iron Works, Philadelphia, Pa. Building, Stovvell Motor Car Co., Syracuse, N. Y. Addition to Electric Storage Battery Co., Philadelphia, Pa. Building, Rome Brass & Copper Works, Rome, N. Y. Warehouse, Wm. Ogden, Binghamton, N. Y. 29 Dry Kiln Buildings, Victor Talking Machine Co., Camden, N. J. Station, General Electric Co., Philadelphia, Pa. New Forge Shop. American Can Cc., Edgewater, N. J. Repairs to Sheds, Southern Railway Co., Spencer, N. C. Foundry, Frazer & Jones Co., Solvay, N. Y. Gurney Ball Bearing Co., Jamestown, N. Y. Packing Plant, J. J. Felin Co., Philadelphia, Pa. Stock Pen, J. J. Felin Co., Nicetown, Pa. Scrapple Room Roof, J. J. Felin Co., Nicetown, Pa. Lean-to over Pump and Tanks, No. 2 Projectile Plant, Bethlehem Steel Co., So. Beth., Pa. Roof of Turbine Room, Bethlehem Steel Co., Lebanon, Pa. Warehouse and Finishing Building, Bethlehem Steel Co., Lebanon, Pa... Roof Court at No. 2 Mill, Bethlehem Steel Co., So. Bethlehem, Pa. Five Bay Extension—48 in. Shape Mill, Bethlehem Steel Co., So. Beth., Pa... Sub-Station No. 1, Bethlehem Steel Co., Lebanon, Pa. Keg Storage Building, Bethlehem Steel Co., Lebanon, Pa. 30 in. Billet Mill, Bethlehem Steel Co., South Bethlehem, Pa. Compressor Building, Tin Plate Plant, Bethlehem Steel Co., Sparrows Point, Md. Exhauster House Roof, Bethlehem Steel Co., South Bethlehem, Pa. 44" Bloom Mill, Bethlehem Steel Co., Steelton, Pa. Gas Blowing Engine, Bethlehem Steel Co., Steelton, Pa. Two Bay Extension, Bethlehem Steel Co., Sparrows Point, Md. Gas Producer Building, Bethlehem Steel Co., Sparrows Point, Md. Lean-to Annealing Building, Bethlehem Steel Co., South Bethlehem, Pa. Sulphate Storage Building, Bethlehem Steel Co., South Bethlehem, Pa. Pumping Station, Bethlehem Steel Co., Sparrows Point, Md. Baltimore Sheet & Tin Plate Co., Sparrows Point, Md. Ext. No. 2, Machine Shop, Bethlehem Steel Co., South Rethlehem, Pa. Tool Room, Bethlehem Steel Co., South Bethlehem, Pa. Tempering Plant No. S, Bethlehem Steel Co., South Bethlehem, Pa. Ingot Mould Budding, Bethlehem Steel Co., South BethLhem, Pa. Armor Piercing Projectile Shop, Beth¬ lehem Steel Co., South Bethlehem, Pa. Additions, Building No. 4, Bethlehem Steel Co., South Bethlehem, Pa. Lean-to Transformer House, Bethlehem Steel Co., South Bethlehem, Pa. Office Building, Projectile Plant, Bethle¬ hem Steel Co., South Bethlehem, Pa.. Annealing Building, Bethlehem Steel Co., South Bethlehem, Pa. Belmont Iron Works, Philadelphia, Pa. M. E. Granger, Syracuse, N. Y. Wm. Steele & Sons Co., Philadelphia, Pa. Plant Engineer T. J. Lacey & Sons, Binghamton, N. Y. Ballinger & Perrot, Philadelphia, Pa. John T. Windrim, Philadelphia, Pa. N. M. Lowney, Eng., New York City H. W. Hesselbach, Arch., So. R. R. Co., Wash., D.C. Sackett & Park, Syracuse, N. Y. F. P. Sheldon & Son, Providence, R I. C. B. Comstock, New York C. B. Comstock, New York Turner Const. Co., Philadelphia, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. 42" Shape Mill, Bethlehem Steel Co., South Bethlehem, Pa. Gun Shop, Bethlehem Steel Co., South Bethlehem, Pa. Mill No. 1, Bethlehem Steel Co., South Bethlehem, Pa. 12-16-18 Mill, Bethlehem Steel Co., South Bethlehem, Pa. Machine Shop No. 2, Bethlehem Steel Co., South Bethlehem, Pa. Blacksmith Shop, Bethlehem Steel Co., South Bethlehem, Pa. Meter and Boiler House, Saucon Plant, Bethlehem Steel Co., So. Beth., Pa.. Locker and Lavatory Building, Bethle¬ hem Steel Co., So. Bethlehem, Pa... Flange Shop, Baldwin Locomotive Works, Philadelphia, Pa. Erecting Shop, Bays “D” and “E,” Ed- dystone, Pa., Baldwin Loco. Works.. Roof over 450 Ton Scale Hou.4e, Bald¬ win Locomotive Works, Eddystone, Pa. Accumulator and Pump Shed, Baldwin Locomotive Works, Eddystone, Pa. . . Pipe and Jacket Shop, Baldwin Locomo¬ tive Works, Eddystone, Pa. Tender Shop, Baldwin Locomotive Works, Philadelphia, Pa. Riveting Tower, Baldwin Locomotive Works, Philadelphia, Pa. Erecting Shop No. 2, Baldwin Locomo¬ tive Works, Eddystone, Pa. Cafeteria, Baldwin Locomotive Works, Eddystone, Pa. Accumulator House, Baldwin Locomo¬ tive Works, Eddystone, Pa. Boiler House and Wood Working Shop, Baldwin Locomotive Works, Eddy¬ stone, Pa. Addition to Machine Shop, Baldwin Lo¬ comotive Works, Eddystone, Pa. Highway Building, Baldwin Locomotive Works, Eddystone, Pa. Dry Kiln Building, Baldwin Locomotive Works, Eddyston-e, Pa. 3 Transfer Buildings, Baldwin Locomo¬ tive Works, Eddystone, Pa. Machine Shop and Office Building, Bald¬ win Locomotive Works, Eddystone, Pa. Woodworking Shop, Baldwin Locomotive Works, Eddystone, Pa. Power House at Erecting Shop, Baldwin Locomotive Works, Eddystont;, Pa... Boiler and Machine Shops, Baldwin Lo¬ comotive Works, Eddystone, Pa. Sub-Station ‘‘E,” Scovill Manufacturing Co., Waterbury, Conn. Celluloid Storage Building No. 71, Sco¬ vill Mfg. Co., Waterbury, Conn. Sub-Station, Scovill Manufacturing Co., Waterbury, Conn. Building No. 118, Scovill Mfg. Co., Waterbury, Conn. Building No. 110, Scovill Mfg. Co., Waterbury, Conn. Building No. 35A, Scovill Mfg. Co., Waterbury, Conn. Building No. 101, Scovill Mfg. Co., Waterbury, Conn. Building No. 68, Add., Scovill Mfg. Co., Waterbury, Conn. 5-Story Manufacturing Bldg., Scovill Mfg. Co., Waterbury, Conn. Building No. 68, Scovill Mfg. Co., Waterbury, Conn. Building No. 35, Scovill Mfg. Co., Waterbury, Conn. Furnace Buildings A and B, Scovill Mfg. Co., Waterbury, Conn. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Chas. E. Lehr, Ch. Eng., So. Bethlehem, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia. Pa. Plan„t Eng. Highway Dept., Philadelphia, Pa. Plant Eng. Highway Dept., Philadelphia, Pa. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Hugh L. Thompson, Waterbury, Conn. Building No. 7, Extension, Ingersoll Rand Co., Phillipsburg, N. J. Wm. Prellwitz, Eng., Phillipsburg, N. J. [48] Engine Room, Ingersoll Rand Co., Phillipsburg, X. J. Extension Buildings No. 9 and 10, In¬ gersoll Rand Co., Phillipsburg, N. J... Lean-to Extension, Ingersoll-Rand Co., Phillipsburg, N. J. Lean-to Extension No. 2, Ingersoll-Rand Co., Phillipsburg, N. J. Ext. to Drill L'ept., Ingersoll Rand Co., Phillipsburg, N. J. Frame Shop, American Locomotive Co., Schenectady, N. Y. Tank Shop, American Locomotive Co., Schenectady, N. Y. Sand Blast Shed, American Locomotive Co., Schenectady, N. Y. Repair Erecting Shop, American Loco¬ motive Works, Schenectady, N. Y.... Extension to Heat Treatment Bldg., American Lomotive Co., Schenectady, N. Y. Hammer Shop, American Locomotive Works, Schenectady, N. Y. Cylinder Shop, American Locomotive Works, Schenectady, N. Y. Quigley Furnace and Foundry, American Locomotive Works, South Framing¬ ham, Mass. Machine Room No. 13, Chester Paper Co., Chester, Pa. Building, Strathmore Paper Co., Woronoco, Mass. Building, Great Northern Paper Co., Millinocket, Me. Silk Dry Room, Sunbury Converting Works, Sunbury, Pa. Dye House, Sunbury Converting Works, Sunbury, Pa. Jigger Dye House, Sunbury Converting Works, Sunbury, Pa. New Machine Shop, Textile Machine Works, Wyomissing, Pa. Mills, Griswold Worsted Mills, Darby, Pa. Building, American Sugar Refining Co., Boston, Mass. Barrel Storage Building, American Sugar Refining Co., Boston, Mass. Office and Wash Room, Ordnance Shop No. 6, Midvale Steel Co., Nicetown, Pa. Ordnance Machine Shop No. 4, Midvale Steel Co., Nicetown, Pa. Pattern Storage, Midvale Steel Co., Nicetown, Pa. Addition No. 6, Ordnance Machine Shop, Midvale Steel Co., Nicetown, Pa. Ordnance Machine Shop No. 7, Midvale Steel Co., Nicetown, Pa. Inspectors Office, Midvale Steel Co., Nicetown, Pa. No. 2 Extension No. 6, Ordnancb, Mid¬ vale Steel Co., Nicetown, Pa. Rolled Wheel Plant, Midvale Steel Co., Nicetown, Pa. Extension to Pattern Storage, Midvale Steel Co., Nicetown, Pa. Test Cutting Shop, Midvale Steel Co., Nicetown, Pa. Washer Building, Breaker Building, Loading Bins, Cambria Stebl Co., Johnstown, Pa. 16-inch Howitzer Plant, Midvale Steel Co., Nicetown, Pa. Manufacturing Plant, Guaranty Silk Corp., Nanticoke, Pa. New Roof for Three (3) Machine Rooms, P. H. Glatfelter Co., Spring Grot'c, Pa. Buildings for P. H. Glatfelter Co., Spring Grove, Pa. Evaporator and Reclaiming Building, P. H. Glatfelter Co., Spring Grove, Pa. . Wm. Prellwitz, Eng., Phillipsburg, N. J. Wm. Prellwitz, Eng., Phillipsburg, N. J. Wm. Prellwitz, Eng., Phillipsburg, N. J. Wm. Prellwitz, Eng., Phillipsburg, N. J. Wm. Prellwitz, Eng., Phillipsburg, N. J. Plant Eng. R. H. White, Schenectady, N. Y. Plant Eng. R. H. White, Schenectady, N. Y. Plant Eng. R. H. White, Schenectady, N. Y. Plant Eng. R. H. White, Schenectady, N. Y. Plant Eng. R. H. White, Schenectady, N. Y. Plant Eng. R. H. White, Schenectady, N. Y. Plant Eng. R. H. White, Schenectady, N. Y. Plant Eng. R. H. White, Schenectady, N. Y. Geo. F. Hardy, New York City Samuel M. Green Co., Springfield, Mass. Plant Engineer, Millinockwt, Me. J. J. Steller, Sunbury, Pa. J. J. Steller, Sunbury, Pa. J. J. Steller, Sunbury, Pa. Vanderstucken Ewing Co. Bethlehem, Pa. Willard Case Co., New York City Plant Engineer, Boston, Mass. Plant Engineer, Boston, Mass. Barclay White & Co., Philadelphia, Pa. Barclay White & Co., Philadelphia, Pa. Barclay White & Co., Philadelphia, Pa. Barclay White & Co., Philadelphia, Pa. Barclay White & Co., Philadelphia, Pa. Barclay White & Co., Philadelphia, Pa. Barclay White & Co., Philadelphia, Pa. Levering & Garrigues, New York City Wm. Steele & Sons Co., Philadelphia, Pa. Barclay White & Co., Philadelphia, Pa. Mr. Moyer, Ch. Eng., Johnstown, Pa. Barclay White & Co., Philadelphia, Pa. Ballinger & Perrot, Philadelphia, Pa. Geo. F. Hardy. New York City J. A. Dempwolf, York, Pa. J. A. Dempwolf, York, Pa. Digester Building, P. H. Glatfelter Co., Spring Grove, Pa. New Building, P. H. Glatfelter Co., Spring Grove, Pa. Factory Building for Aberfoyle Mfg. Co., Chester, Pa. Fire Tower, Aberfoyle Mfg. Co., Chester, Pa. Cold Rolling Mill, Henry Disston & Sons, Tacony, Pa. Transformer House, Henry Disston & Sons, Tacony, Pa. Welding and Finishing Bldg., National Tube Co., McKeesport, Pa. Buildings, National Tube Co., Lorain, Ohio . Roof, Horn Weld Building, National Tube Co., McKeesport, Pa. Machine Shop, Gillinger Sons, Wissinoming, Pa. Manufacturing Bldgs., Gillinger Sons, Tacony, Pa... Buildings for Gillinger Sons, Philadelphia, Pa. Building, The U. G. I. Con. Co., Llanerch, Pa. Buildings, The LT. G. I. Con. Co., Bridgeport, Pa. Boiler and Power House, Standard Oil Co., Bay Way, N. J. Roof, Boiler Shop, Standard Oil Co., Bay Way, N. J. Philadelphia Tapestry Mills, Philadelphia, Pa. Building, Allentown Bethlehkm Gas Co., Didier, Pa. Silk Mill, Madison Textile Co., Lock Haven, Pa. Power House, Madison Textile Co., Lock Haven, Pa. Shoemaker-Satterth waite Co. Geo. F. Hardy Co., New York City Ballinger & Perrot Co., Philadelphia, Pa. Plant Engineer Arthur N. Blum Philadelphia, Pa. Henry Baton, Philadelphia, Pa Plant Engineer Plant Engineer Plant Engineer Wm. Steele & Sons Co., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Wm. Steele & Sons Co., Philadelphia, Pa. Plant Engineer Plant Engineer Plant Engineer Plant Engineer Wm. Steele & Sons Co., Philadelphia, Pa. U. G. I. Con. Co., Philadelphia, Pa. Turner Construction Co. Philadelphia, Pa. Turner Construction Co. Philadelphia, Pa. OFFICE, STORE AND MERCANTILE BUILDINGS Office Addition, Lewis F. Shoemaker, Pottstown, Pa. General Electric Bldg., General Elec¬ tric Co., Philadelphia, Pa. Roof, McGraw-Hill Publishing Co., New York City. Alteration, Harriman National Bank Building, New York City. Alteration, 1306 Chestnut St., Philadelphia, Pa. Alteration, 433 East 48th St., New York City. Alteration, No. 60 Wall St., New York City. Alteration, Geo. Miller Piano Store, Philadelphia, Pa. Alteration, Building for U. S. Food Products Co., New York City. Haddon Hall, Stores and Pavilion, Atlantic City, N. J. Alteration and Addition, Curtis Building, Philadelphia, Pa. Central Office Bldg., for Bell Telephone Co., Atlantic City, N. J. Alteration and Addition, Curtis Bldg., Philadelphia, Pa. Addition, No. 2 Broadway, N T ew York City. Roof, Parkway Building, Philadelphia, Pa. Addition to Thalheimer Dept. Store, Richmond, Va. Headquarters Building, Bureau of Water, Philadelphia, Pa. Fourth Floor, Anderson Galleries, New York City. City Centre Building, Philadelphia, Pa. Addition to Kaufman Store, Pittsburgh, Pa. Plant Engineer Plant Engineer Starrett & Van Vleck, New York City Wells Bosworth, New York City David Basset Snare & Triest Co., New York City Clinton & Russell, New York City David Basset Kaufman & Levine, New York City Rankin, Kellogg & Crane, Philadelphia, Pa. Frank C. Roberts Co., Philadelphia, Pa. Bell Telephone Co. Frank C. Roberts W. B. Tubby, New York City Rouse & Goldstone, Philadelphia, Pa. Carneal & Johnson, Richmond, Va. Dept, of Public Works, Philadelphia, Pa. Charles H. Gillespie, New York City Rouse & Goldstone, Philadelphia, Pa. Benno Janssen, Pittsburgh, Pa. 149 I AVERY LIBRARY .COLUMBIA UMVEfiSBir Alteration and Addition to Bell Tele¬ phone Bldg., Wilkes-Barre, Pa. Alteration and Addition to Kaufman Store, Pittsburgh, Pa. State Office Building, .Richmond, Va. Lancaster Central Office Building for Bell Telephone Co., Lancaster, Pa.. Atlantic Building, William and Wall Sts., New York City. Lawyers Title Insurance Co. Building, Montague St., Brooklyn, N. Y. Wesleyan Building, Boylston St., Boston, Mass. Bacon and Chappel Building, Syracuse, N. Y. Vinney Building, Syracuse, N. Y. Office Building, B. R. & P. R. R. Co., Rochester, N. Y. 42 Broadway Building, New York City. Mutual Building, Richmond, Va. 60 Wall Street Building, New York City. Beaver Building, New York City. National Bank of Savannah Bldg., Savannah, Ga. Hudson Building, South Warren St., Syracuse, N. Y. . . Smith Block, Rutland, Vt. Store, Hurlburt & Sons, Philadelphia, Pa. Dept. Store, Sissons Bros & Weldon Co., Binghamton, N. Y. Building, Fred J. Weyand, Boston, Mass. Mercantile Building, E. L. Snider, Boston, Mass. Addition, Horn & Hardart Co., N ew York City. Store and Manufacturing Building, E. L. Snider, Boston, Mass. Building, Whidden & Co., Boston, Mass. Sun Building, Lowell, Mass. Factory Building, C. W. Olmstead, Syracuse, N. Y. Building, Julius Stoll, Rochester, N. Y. Page Building, Lowell, Mass. McCarthy Building, Syracuse, N. Y. Film Exchange Building, Boston, Mass. John T. Windrim, Philadelphia, Pa. Benno Janssen, Pittsburgh, Pa. Carneal & Johnson, Richmond, Va. John T. Windrim, Philadelphia, Pa. Clinton & Russell, NLw York City Frank J. Helmle, Brooklyn, N. Y. C. H. Blackall, Boston, Mass. A. L. Brockwav, Syracuse, N. Y. C. Merrit Curtis, Syracuse, N. Y. Clinton & Russell, New York City Henry Ives Cobb, New York City Clinton & Russell, New York City Clinton & Russell, New York City Clinton & Russell, New York City H. W. Witcover, Savannah, Ga. Russell & King, Syracuse, N. Y, Arthur H. Smith, Rutland, Vt. Rankin, Kellogg & Crane, Philadelphia, Pa. T. I. Lacey & Sons, Binghamton, N. Y. C. Henry Desmond, Boston, Mass. F. A. Norcross, Boston, Mass. Harry R. Rust, Philadelphia, Pa. F. A. Norcross, Boston, Mass. Whidden & Co., Boston, Mass. C. H. Blackall, Boston, Mass. Taber & Baxter, Syracuse, N. Y. J. H. Oberlies, Rochester, N. Y. Derby, Sheppard & Robin¬ son, Lowell, Mass. Russell & King, Syracuse, N. Y. F. A. Norcross, Boston, Mass. PUBLIC AND SEMI-PUBLIC BUILDINGS Auditorium and Ice Palace Geo. F. Pawling Co., Philadelphia, Pa. Philadelphia, Pa. I). A. R. Building, Marsh & Peter, Washington, D. C. Washington, D. C. Passenger Station, N. Y., N. H. & H F. W. Mellor, R. R., Hartford, Conn. New Haven, Conn. Pennsylvania Railroad Terminal, Jersey City, N. J. P. R. R. Co. Engr. City Hall, H. W. Witcover, Savanndh, Ga. Savannah. Ga. Lehigh County Court House, Robert S. Rathbun, Allentown, Pa. Allentown, Pa. St. Nicholas Skating Rink, Ernfcst Flagg, West 66th St., New York City. New York City Engine House, Merrick & Randall, Syracuse, N. Y. Syracuse, N. Y. BANKING BUILDINGS Peoples Bank Building, Steelton, Pa. Herman Miller Roof, Federal Reserve Bank, Richmond, Va.. Building, Richmond Trust Co., Richmond, Va.. Bank Building, Haddonfield, N. J. Bergen and Lafayette Trust Co., Jersey City, N. J. Peoples Bank, South Orange, N. J. New Haven Savings Bank, New Haven, Conn. Cambridge Savings Bank, Cambridge, Mass. Five Cent Savings Bank, Fall Riv. Neil G. Beggs, Toronto, Ont. Neil G. Beggs, Toronto, Ont. Brown’s Copper & B. R. Mills, New Toronto Dominion Power & Trans¬ mission Co., Hamilton, Ont. R. Legault & Co., Montreal, Que. Warehouse, Andrew Wilson Co., Toronto, Ont. Theatre, Toronto, Ont. Nurses’ Home, Montreal, Que. Adelaide St. Hotel, Toronto, Ont. Pipe Foundry, Harkness & Oxby, Toronto, Ont. Royal Bank of Canada, London, Canada . Crane Runway Building (Co.’s Engi¬ neer), Montreal, Qt*e. Grand Stand—R. E. Bostrom, Montreal, Que. Addition, Bell Telephone Co., Montreal, Que. Building, Wayagamack Pulp & Paper Co., Three Rivers, Que. Majestic Theatre, Montreal, Que. Rolling Mills, Toronto, Ont. New Rod Mill Building, Montreal, Que. Crane Runway, Montreal, Que. Jeffrey Hall Hospital, Montreal, Que. Foundry Extension, Montreal Locomo¬ tive Works, Montreal, Que. Factory—Crane Ltd., Montreal, Que. Machine Room Extension, Price Bros. Co., Jonquiere, Canada . Auditorium, Ottawa, Ont. Andrew Wilson & Co., Ltd., Toronto, Ont. Jos. T. Turner, Toronto, Ont. A. L. Byers & Co., Ltd., Montreal, Quo. Wm. Heppler, Toronto, Ont. National Iron Works, Toronto, Ont. Purdy & Henderson, Montreal, Que. Steel Co. of Canada, Ltd., Montreal, Que. Reid, McGregor & Reid, Montreal, Que. Anglins, Ltd., Montreal, Que. T. Pringle & Sons Co., Montreal, Que. D. J. Creighton, Montreal, Que. Brown’s Copper & Brass R. M., New Toronto, Ont. Steel Co. of Canada, Ltd., Montreal, Que. Stfeel Co. of Canada, Ltd., Montreal, Que. McMullen, Reiley & Durley, Montreal, Que. Plant Engineer Anglin’s Ltd., Montreal, Que. G. F. Hardy, Eng., New York City Richards & Abra, Ottawa, Ont. In the foregoing list there are undoubtedly some buildings which are near enough for your convenience should you desire to inspect Metropolitan Floor and Roof Installations. If you cannot find them on this list we will be glad to direct you to the nearest installations. Please do not hesitate to call on us for any further information you may wish. We are not manufacturers but an operating or service organization and will be glad, not only to provide all necessary information, but to submit our recommendations for your floor and roof construction without the slightest obligation on your part. KEYSTONE GYPSUM FIREPROOFING CORPORATION 1328 BROADWAY, NEW YORK, N. Y. Branches: Philadelphia, Pa. Washington, D. C. Richmond, Va. North American Building Real Estate Trust Building 418 East Main Street KEYSTONE FIREPROOFING COMPANY OF CANADA, Ltd. Quebec Toronto Montreal 103 St. John Street 250 Richmond Street, W. 603 New Birks Building Printed in U. S. A. Prepared and executed by Philip Kobrk Cr>., Inc. . ;• 'Sj . * \ ■ v i. & t ■ \ h t- .. ; K ' ’ «4 > # •,,v ^ V A.;.' , ; . :: . ; - ;:*:w ' • ' *•• • ; : %py-i-. 4 ;■■'" ' . • "'-W -.r. ■ v ■ i •'■ t i'AVERY LIBRARY iimbia univer: ‘ COLUMBIA UNIVERSITY ■' ;■' /■ ■■ T> ... ift. - 1 MR.., . • •: ••* He \ ,. . 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