INDUSTRIAL LIGHTING CODE FOR FACTORIES. HD/279 U5 03 f _ THE INDUSTRIAL COMMISSION OF OHIO DEPARTMENT OF INSPECTION DIVISION OF WORKSHOPS, FACTORIES AND PUBLIC BUILDINGS. INDUSTRIAL LIGHTING CODE FOR | | Factories, Mills and Other Work | | | Places Recommended by the General Advisory Committee and adopted by the Industrial Commission of Ohio as a guide in the inspection work of the Division of Workshops and Factories until such time as the Commission niay deem it advisable to issue same as a general order. Adopted May 6, 1920. MEMBERS OF THE INDUSTRIAL COMMISSION OF OHIO vy, T. J. Durry, Chairman J. D. Crarx AD By d, /Evier R. S. Haves, Secretary | eS | sf eg be) ; T. P. KEARNS, Cuisr Deputy ; | U503 ace OHIO: = THE F. J. Heer PRINTING Co. ae 1920 Bound at the State Bindery. ba a Gea ahs ee Ks): Gk e by CH ace } 4 es MEMBERS OF COMMITTEE ON INDUSTRIAL LIGHTING CODE Chairman, Pror. F. C. Catpwe.i, Elec. Engineering Dept.,O.S.U., Columbus, O. Secretary, GEORGE W. WALKER, Cooper-Hewitt Electric Co...:...... Cincinnati, O. Perr (CRAIGLOW, ‘buckeye steel Castings: Corsini. sos 1.cin gee ees Columbus, O, Tuos, J. DONNELLY, Secretary, Ohio Federation of Labor........... Columbus, O, S. E. Doane, Chief Engineer, National Lamp Works................ Cleveland, O. H. L. Jenxrns, Illuminating Engineer, Holophane Glass Co........... Newark, O. OREN. GRANEY. (S00 OVWWest Hederal Stk i tyserie «eitoete aisceyate ethers lars oe Youngstown, O. J. Q. Apvams, Asst. Chief Deputy, Factory Inspection Dept., Indus- Erin A Womimrsston,.O 1+ OliOee s ears soiel nekomanin Stent aaent nace eae Columbus, O. vee sine CODE OF LIGHTING FOR FACTORIES, MILLS AND OTHER WORK PLACES > Rule 1. General Requirements. as Work spaces in buildings or grounds and spaces which an employee is required to traverse in the performance of duty shall be provided with light during the time of use in accordance with the following rules: RULE 2. Intensity.* The minimum intensities of illumination which shall be maintained and the preferable intensities are as follows: Foot-CANDLE AT FLoor LEVEL. Grade. . Minimum. Preferable. A. Prescribed and designated yard thoroughfares, road- Weer PIPE TIAS SARC WAYS ad Aas cl) cats als caters weiner Whee ee ele 1/50 1/20 to %4 B. Intermediate and auxiliary spaces in interiors.......... 4 1%. to. 2 Foot-CANDLES ON THE Work. Minimum. Preferable. C. First Degree Operation (work not requiring discrimina- tion of detail as handling material of a course nature). yy 1 ‘to; 23 D. Second Degree Operation (rough manufacturing re- Cutiines discrimination. Of detail)... codecs ce viece een | DE tOnno E. Third Degree Operation (medium manufacturing re- quiting closer: discrimination of detail)... 5.500... 6.64. 2 3 to .9 F. Fourth Degree Operation (fine manufacturing)........ et 4 to 12 G. Fifth Degree Operation (finest manufacturing)........ 5 Srtom, H. Processes, otherwise safeguarded, in which light is GKELSCINAD ET ANIEUC eG See Uy Ry pees) eA ag ne ee a 0 In order to take into account degree of precision in measurement, a variation of 15% below the above intensity values will be allowed. The Industrial Commission of Ohio shall specify the grade of illum- ination to be provided for any given operation. Accidental temporary diminution or total loss of illumination, re- sulting from failure of energy supply conductors or lamps, or from the presence of unusual quantities of smoke, steam or fog, shall not be construed as failure of the employer to comply with the provisions of this rule. Rule 3. Glare. Objectional glare resulting from either natural or artificial light shall be eliminated wherever possible. Exception may be made in the case of glare which is necessary in performing a specific operation. (3) Rule 4. Distribution. | = | Lighting facilities shall be so provided, with reference to direction and distribution of light, as to give illumination on the work without objectionable shadows and deep contrasts of intensity. The classification of various industrial operations included in the a Industrial Classifications of Section 6 of the Appendix is not a part of Rule 2 but gives the standards recognized by the Industrial Commission of Ohio. Measurements of the illumination is to be made in the principal plane in which the work is done; that is, on the horizontal, vertical or‘on intermediate plane as the case may be. - “On the work” signifies at whatever points vision is required in the performance of the given operation. While permanent and general lighting is preferable in most cases, the intensity requirements of this rule may be met by the use of localized or portable light sources. There are three principal factors which determine ie PEP Les classi- fication of a given manufacturing operation. 1. The reflection factor of the surface worked upon; ass material require higher intensities than those of light color. 2. The fineness of detail to be observed. 3. The closeness of application required. Rule 5. Until July 1, 1921, when the Industrial Commission shall give con sideration to the advisability of issuing the code as a General Order, no provision of this code shall be considered to be a “General Order” ora “Legal Requirement’, except when, and only when the provision or provisions thereof shall be embraced in a special order issued by the Industrial Commission or its agencies direct to operators of -plants specifically designated and giving specific instructions for carrying the same into effect in such plant. APPENDIX TO THE CODE OF LIGHTING FOR FACTORIES, MILLS AND OTHER WORK PLACES This appendix is not a part of the code, but contains explanations and suggestions to those responsible for carry- ing out and for enforcing the rules of the code. 1. Flux of Light. Every light source emits a certain flow or flux of light which may be looked upon as a volume of light rays pro- ceeding out from the source of straight lines in all directions. .When these fall upon anybody they are either transmitted, reflected or absorbed. 2. Unit of Flux, The Lumen. The amount of this flux, other things being equal, 1s a measure of the value of the source of light. Its unit is the “lumen’’. 3. Candle-power. The unit of light intensity is the candle- power. A lamp is said to give a light intensity of five candle-power in the direction of some given small object, when it gives five times as much light to this object as would be given by an international candle, if it were substituted for the lamp under consideration. 4. Illumination. The above units refer to the light source itself and are independent of its surroundings. When a light-source is used for purposes of illumination, the light falling upon the.surface to be worked upon or otherwise observed, becomes the object of interest. This il- lumination depends not only upon the amount of distribution of the light irom the source, but also depends, in varying degree, upon the reflection from the ceiling, walls and other lighted surfaces. 5. Unit of Illumination, The Foot-Candle. This lighting of the surface is called quanitatively “Illumination” and its common unit is the foot-candle. This is the illumination on a surface one foot from a light, which gives one candle-power in the direction of the surface. A surface lighted to an intensity of one foot candle receives one lumen of light flux per square foot. Minimum and preferable values of il- lumination are givén in Rule 2 of the Code. 6. Light Intensity. ‘he minimum values of intensities given in Rule 2 are based on the minimum standards for safety and health only. The higher figures given under the “preferable” column are generally advisable, not only from the standpoint of safety and health, but also production, and even higher intensities are often used. The following is a classified list giving the light intensity grades recognized by The Industrial Commission of Ohio for factories, mills and other work places: Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. ASE ES phase SR AAR cp DOT ie Sas hoes Se B . % %to 2 Assembling — Rogeh tassemol ing: sc. Pat enc. Oe dea a ooh bene ee D 1 2to 6 Mediu assembling ail. mse .e ee tines E 2 3 to 9 Mivies, ASSEHIDIINS: soniet feos ees oe ae Peep eat ee F 3 4 to 12 Extraatines assem pilings cae can ane decree chee G i) SB-tom Automobile Manufacturing — See machine shops, paint shops, wood-work- ing shops, etc. Bakeries Mise and pakitie) acer ea oe E 2 3 to 9 Boiler, Engine Rooms and Power Houses — TO TLETS eee ee ie oe eR cn nk a Tae G WA iMetoye 3 Coal and ash ieaiing PECs eee, ee Ae ce ae 1G y, I ton Engines, generators, blowers, compressors... E 3 toy 9 Meadiiiary “equipments < acces) luaesut ace Seon D 1 PAK ea Oil iswitches and transiormers sc 25.0.8 donee D 1 2to 6 SaeC POAT, Ua. Sees Ro 2k rosa ete ae D ik 2-to; G SHOLAwe!-HALELY TODS Ay tuswis aorta rhea G es 1 tomro Brewing, Distilling and Bottling — Oulitve mercer) A eS etic omelets See oer eee D 1 2to 6 BORbin Ooo a. oats ie Bere Rie eaegeh con oe eee E 3 to 9 Clearing or resting ‘aad fermenting Sete cremanieeen G Y lto 3 Coal ship nds te eaneeaed Rink Maen as G VY isto. 3 FORCING SSI 408 Ct nol Been ie os ee aha yao ee D il 2to 6 Wap oli dig = occ et ae SE GAH eterna Tae D 1 2to 6 Candy Making — (COOKING OVE hin aces. «ote nei met ate E 2 3 to 9 Boole Stabs ins oats Beek o 5s hee Rie ene en E 2 3 to 9 tream Peaber pmacnines. 20. vac «eu hehe E 2 3°to 9 Bp pier CHARGE as ok koe oan te soe eae {E 2 3 to0 IY Wee ihn Keath int Alain ie rh NAL oR Ed Sl Savio oon Te E 2 3 to. 9 REVOIVIS “Pat. Sor. cocnt Siteda oatote hee ee E 2 3 to 9 purine Hench. os oi cas | haa akon ad ee ae E 2 3 to 9 WV CIOMES. And “Measures Cor cuecicn eee ae E 2 Seton. Wirap pio canis. packill eo scabs. een ent Teens E 2 3-to <9 Canning and Preserving — Cooking rs Scch. ape She ea Set ae E 2 3 to 9 Assorting, cleaning, cutting and pealing..... E 2 3 to 9 Paid: Sllivig i eisceen ty fates ee ele eee ee E 2 3. to.” 9 Machine. fillings), 2... «tsveniee kaa eae EH; 2 3 to. 9 Note that intermediate and auxiliary spaces in interiors require Grade B. Bey Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. Chemical Works — Mrechami Galera@Gnaces a sckien 0s cc chek «wen acres D ee: 2 to 6 ein lmeC RACE SMe pyar er otis Seek eeu eae wa G, 4 AG - 25 Tanks for cooking, extractors, percolators, , igh TAYO SARS Se bacco aie non Rate Ato oe eae: E 2 3:to °9 BE OM i ee MS tory ie Hw uct Ske oe oe er es c yy Ie tomes, MreMCMOLGIS, ANCE SLUNG <7 O86 Ges wees fen Cae ol D 1 2to 6 Mechanical dryers ...... 52 ie ce ee D 1 2 to 6 SS talroOnayed Lyehol ack irtcas elec ale eta tas G WA LEtoets BAVA OU ULO LS Sieecs > sneer es Ihys oalicen Memos aN ap oiseal a nial ahs D 1 2to 6 Etech GIG flame aee seventeen Piarriaasttrsnorcisi dete’ s Saco bots D 1 2 to. 6 Mechanical crystallizing ..... eeata Sy rally D 1 2to 6 Stationary or gravity crystallizing........... @ y% Stores EMIS ACI Oueenrsac 9 Mesrchadena Mya aract iets scieoas Val poe oc eaee ve =p) 1 2to 6 Eteeotmtses Cells ci, Sie ike we chy ee E 2 B to. = 9 Clay Products and Cements — PUAN EN eng ohh SORE Ma seeNTE A ho at) Kiaoused eae ae E 2 3.to <9 CAE LAL Rs MA Ca ene eo Se C y% Pito a nib erayDLESSESP citi ate al nereteis soa RhG a's else ¢ WA toes BP OsAS SATIS TIVE SSTINE vicw oo glo Ayes we G, do demas & D 1 2 to 6 le anin ou ance tiinimMitiervse ct a inctasl. deta vrei D 1 ZatOro0 Eoloninoewmand olazinewe ca. aucett a. wa ees eacte: F 3 4 to 12 KetlimeOOinsmra tenes teat husk ou oe een Cc yy ik ie 8 Ie RNG il dist 8 ee Scamenys nia saeeahe wf ates ie B % Yyto 2 Cloth Products — Li Darks ~ Eb Darke « Laght, Dark. Ree SOMME Sr ac icy 50, ates tadicen F G a 5 4 to 12 St6. 35 Sewing (Machine) ........... F G 3 5 4 to 12 S1LOlee. Dewi and) ioe os ee Se eet ob G 3 5 4 to 12 SatOr.ce RES SITCOM Pe tentel Micktactcen Sickert a owes F G 3 5 4 to 12 SEtoren egy over aT eae ae F G 3 5 4 to 12 8’ to>.. Cloth treating (oil cloth, etc.). E F 2 3 3. to 9 4A to 12 Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. Construction — INE(GKOXEVE NN, See, Beas ers ea ea ee re C WA VetOn BD (NE NWal yng Aas ne Sta i Se a ee Ree ein B WA Tonto. 12 Dairy Products — Separators, evaporators, churns, molds and PIRESSCSL Bate nee ke cet tys | Seccia Sie dh eataonee sar 6 be E 2 dato 9 ISO UMNZ Ome ey eit ao crh alaeare Sa wi ches teen ieee! wee! gos E 2 3 to 9 BOLLS Canines ANGMIADCLING \ s/c occc. ale came, oe E 2 3 to. 9 PRP SCARE ELGE Sa so Ba Pips aie oak seat ee E 2 oto" NEAL IMEEM REET eM Ag cine MA osc bodes weno, CAL Red winch G ‘a a oe Note that intermediate and auxiliary spaces in interiors require Grade B. Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. Electric Manufacturing — Coitvand -armatgre winding: 2 2.cneiier nous F 3 4 to 12 IMIGAS WOT Ine ana crane sarc tet aia veeie, aise eee ey 3 4 to 12 FES UAION AMNOLANIS #0 ste ards SE F 3 4 to 12 Other sins ulatine “processes ace. sce os lela F 3 4 to 12 Storage battery-molding or girds........... E 2 o2tO> og Damp: tianulactiritig: vr.+ccs ee oos aur ae ee G 5 8 to-:: WY 18S CTS LATING Go... eos. cies ny sigeee eM eee ee F 3 4 to 12 Elevators, Freight and Passenger. s....+.cs0.000+ & yy 1 to 3 Engine Rooms — (See boiler). Forge Shops and Welding — TOMO 2 ROEO UNG - tries! Aare accent oul see inte a ae D 1 2to 6 Pine™ TOrsing =. ose. ss Sasi AE ot, DIY Suse ee ie E 2 ato 9 AITOPTAOT WMS les tag's Sever cn eee eeegted ate eNO ee E 2 3to 9 Spottande butt weldiog 23.2. .cias sae bere Tene E 2 3 to .9 PRS CLC LISS Me aonay a attains hari ora enc gay E 2 3 to 9 Foundries — PROUIS Et TAGLAR fot cans he cannes eal ore okace «en D 1 2to 6 Faje (imoldme. ui accu a bene in eon ae aa E 2 3 to 9 Core; making cough? <.c.2s.ce asa ceca ene ae D 1 2to 6 CObe. Mirae er + Aes ites a cias Se a aioe dee E 2 3 to 9 Chafgine snoots weskietos nat cek sores eee e ee ae Gi yy torr MASEL hohe Dina steer aa po ue alg aes aera aca fhe Y, lto 3 PULCSNAOS civic ose eochee token eee a eee ee eS VE 16.3 Bouting rand shakin ow outer cite ce ae ate te iG yy IFtow es Glass Works — WLS OOTES tea. cy vad ok ee enn RES ce : D 1 2to 6 Purnace eroons.:s2 2 = 4 Manteno wear D 1 2:to +6 Castinecand déhn tay ae noe hie aor acura ine tae D 1 2 to .6 AENICIN yas s x sw aalaek dane rie uae ee eee ee a E 2 3 to 9 Fine grinding and polishing .s «.cs:csms ss ec6s F 3 4 to 12 Glass blowing «machine: ..*..\..4% 2 eaux seen Bes 2 3 to Cuttin se -rTaeel to -siae us its 2 ccs ee eee ee E 2 SetOreg Glass ‘cutting (cut 21ass)s7 s/o. 4 os ee G 5 oto GOVEliNn Gro io daly nll ee ieee een F 3 4 to 12 Silvetiiige “sip, eras ease mveriiahe ciraben teee eae eeneise le cent E 2 3 to 9 Inspecting mediuinets cance etree F 3 4 to 12 Laspectitie;< fires cy. 4S Sloe ote ne eee G 5 5S eae Hichin omands decorating. 1st G ee ee F > 4 to 12 Glove Manufacturing — Lt Dark. Lt. Barr: Light. Dark. SST e hein. ce MRM te ese F G 3 5 4 to 12 SMG cs attire 5 san wie ens Deanne E F 2 3 3 to 9 4 to 12 StICCHiity sic ara Pon Mee ae F G 3 5) 4 to 12 SAOr sn Trimming and inspecting....... Fk Cee mess (2) 4 to 12 Seton PRESSING ge. dates oe ene eS E F 2 3 3 to 9 4 to 12 Gc ater a: 0. Fe unig, Been ee E F 2 3 3 to §$ 4 to 12 Note that intermediate and auxiliary spaces in interiors require Grade B. Industrial Classification. Halls and Passageways in Interiors.........0.+ Hat Manufacturing — Lt, Dark. - Forming, sizing, pouncing, flanging, finishing and rlis(Ol0U) C20 Sapa ie Tama oe E F Dyeing and stiffening......... D E MAAC SINR Won Cate g coe erat ige sy 8 D E _,Cleaning and refining......... D E PoP ig Mee Sec ster he ecae eieloseak F G Industrial Classification. ° Ice Manufacture — Ice making Inspecting — Rough inspecting Medium inspecting Fine inspecting Bere ae MESHOCUNG. Gol eckson swe wees Jewelry and Watch Manufacturing — Bench work and extra fine machine work.... Stamping Engraving Jewel working Machine work Laundries and Dry Cleaning — SOME PAN CaM AKIN: vi muicie oyectanege ons o5's Washing Mangles and machine ironing............. Poreastie atl Nand tONiNy skeen ee 3s os DinvaAtiGie stedint . ClEAIIGy, nies crisisicis, ce n.d oes Leather Manufacturing — Cleaning, tanning and stretching, etc....... Cutting, fleshing and stuffing.............. Rtmeune ail) SCATONE «25.00% kes cc vcca ss WE 0 RC es ey Re Leather Working — Lt. Dark. Grading and matching......... F G GuttinowandeSGabine:. s.arisivc as F G rer Mien Maes cae. COTS, 5 F G Pressing and winding......... Ro Scale el Shur SiGl ale ate wi 66 8 e's 6) ae 6 alae 4.0 @ 0) 6 oP aisha ie 6 ee oa ele eta @) €ce,[e1 6:8 0 (6: o' ¥ Ore Sy ee a ee Se ee i a Yi wie Se ens o)6. © Oa Que ow e286. bye @) 06) 4) © met aiuce 6 @ #9) 6 ws © 9's 01d © €-0 0.0 © 04.6 oe #8 eo ee Intensity Foot-Candle Intensity Grade. Minimum. Preferable. Raores is 4 %to 2 Lt. Dark. Light. Dark. 2 3 3 to 9 4 to 12 1 2 2to 6 Beto. -9 1 2 2to 6 3 to 9 1 2 2 to. & a to... 2 3 i) 4 to 12 8 to. Intensity Foot-Candle Intensity Grade. Minimum. Preferable. ae D 1 Vatone6 D 1 tomo E 2 ator 9 F 3 4 to 12 G oS 8 to G 5 8 to G 5 8 to G 5 8 to G 5 8 to G 5 8 to E 2 Suto vng 1B) 1 2to 6 E 2 8 to 9 E 2 3 to 9 E 2 SEEOIG D 1 2 to E 2 3 to 9 EF a AB tombe E iy lstor ra Lt. Dark. Light. Dark. 3 5 4 to 12 Soto 3 5 4 to 12 Sa tOr ers 3 a 4 to 12 Sr tOn ws 2 3 ato. 9 4 to 12 Note that intermediate and auxiliary spaces in interiors require Grade B. Locker Rooms Paint Manufacturing Paper Box Manufacturing — 16) Industrial Classification. Machine Shops — Rough bench and machine work........... Medium bench and machine work........ Fine bench and machine work........... Extra fine bench and machine work...... Automatic machines (ordinary).......... Automatic: machines: (ime) 0 o.\is ween soe Grinding — IROUSHEWOK an ono tome ret etc rarer: WMreditii wil ain a ara cannes ote Pines wonkiesc. ac me eR on nares Buffing and polishing — Me Gui Wire 52 obra cnet pence ne eee Sime Sty Obes ven ct tang te ie ee cine a Meat Packing — Slaishterinovens ven reacek wptarnoe ete er leaning and \cutinig’. 7. c a eek cok tetonie oe COGN Om ys Tee Eee t oe Sa mee eta eae Crinditio sand packings Us... .c4 as aie ere aries CATLIN ete reac ree & eerrag ten eels canner ee Milling and Grain Food Products — Gleamino waa e te PEAR SRT ORA ROO ee Patines (Pe viciabaal pgs) me coi bh ee (ye haike anon ace ABER ES iM oe a. Bakinyy vot eT Oastitl Siwy minke Caan ihe sian nea Packing — BeOS yay Soa ae ogo a ARE eat ae hate, Pada wens NNT SENG SS eae ae or aay OBS nee ADEN tae oa BINGO Se tae ch Lene nats Leena OE Aer Paint Shops — Dini hOry SOLAVING y |. tine A ee BRAMAN See ke nc ae hie.) Shen ak ae ee ls | ic 3 bok ice RRR A AR EMRE Nahe ah ures Riana a Hand painting and finishing, ordinary...... Hand painting and finishing, fine......... NAL eel lol ce ole bi 61.4 ae re. a! 6.16! a) lw (6 Lois cay tbo e— we Oe Intensity Foot-Candle Intensity Grade. Hand painting and finishing, extra fine — automobile bodies, piano cases, etc... Lt. Dark. Cities eat ta oe ee nee D E Machine toldineiih Aare aee D E PlardefOldine: nie, ee ie eee D E Pasting and assembling....... D E Lt. Dark. 1 1 1 1 te atte tmoatnd He aga eo come sia coe) eae ob cs in) Homo G 2 2 2 2 Minimum. or poe Co po or CO pO qo po nm Ww eR | ore OS) 2 to 2 to 2 to 2 to Light. ODD DD Preferable. Ito 3 2 to 6 Beto es 4 to 12 Stones DatOaed 4 to 12 3 to- 9 Att. Lo 8 to ato. 9 A to £2 Betomnt 3 to 9 3 to 9 B pOwsee! 3 to 9 2 ito: 6 2TtOrnG BP TOL 4 to la mH CO bO + ° <> bo — ° lor) 210, 216 DetOus ae 2 to 6 Seton 4'to 12 SetOwss Dark. 3 to 9 3 to 9 3° to; 9 BttOrsg Note that intermediate and auxiliary spaces in interiors require Grade B. IT Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. Paper Manufacturing — | SE RE Bar eect sPand sNugeueoh dacs At ohdce cca ev aes AR eGo D 1 2 to: 6 SN OUON AUGER Ciretn ty Glstc. seek Sepia < uly ou .ads oo te E 2 3 to 9 VEE CLIT eee RP Oe oh ane Toies: eae el ms atten hea D 1 BetOrnG Cerin Cline Meee OPT eee lore wae Si timivectcs o aae D 1 2 to 6 Finishing, cutting and trimming....... Grae ae F 3 4 to 12. Passageways — See Halls. Plating — ERS Te ROR OO 9 6) A Sr or ea D 1 pa to “G6 Pouce and) burnishing iy... 5 is wos ee cbt ae E 2 3 tos 9 Power House — See Boiler. Printing Industries — PHEOINE ABO -MONOLVP Cw is on. asa wok pee hk G 5) econ (oi SESS Via ai ea ae ee a G 5 So. tome Re PPLENA S LOI ES at ofeach hic ee ace inl eee G 5 8 to. Matiz Toe Al: aCASTING «0, czy es fae ae ie E 2 away 8) Witec ClameOUs + MACMINGS <<", oe. ce ce hls sank E 2 a toe 9 OO Pera Ihoamen patie sia. sedesc seeiclekes( Gils tretat bes F 3 AL axoyed i Presses, job and small automatic............ E 2 3 to 9 Presses, rotary, flat, bed, etc....:.. Dare alee E 2 DutOn ae NETO CS DIINO cit pt ict ole soe ee F 3 4 to 12 EM GCEOLY OHIO Me Ie hot, te ok eal lo tiie askattoeen ce F 34 Ato, V2 LOT TER) 0 Oo ane ea ie tal a te GE | a a G 5) SEtOur ReBCOTEIHG GO SHIPPING.» ons vids 4 soko ccs odes be oe des D 1 2to.+ 6 Roadways and Yard Thoroughfares.............. A 1/50 1/20 to % Rubber Manufacturing and Products — RTO AIT iy Rice de ewe ae ck aes Rb ea es D il antOe 40 MINS ME Rs rte cll S) Ae Ya Si Gy reece aac 8 Dp: 1 2 to 6 Rte le re ee, Sa aie, che cca'a,'b SOE eas vols E 2 Sieitaye W) Fabric preparation and stock cutting........ D Fe! Py ilo) 6 OURS SORES CVE Vir 00 hal coer a 1B 1 2 to. 6 FESR STC IT SI AS eR E 2 3 to 9 Pneumatic tire building and finishing........ E 2 BD to 9 pruaguntipes ODELATIONS .2.'.. Osc. oe clee va bk’ewhice vcs D 1 DetoeeG Teles teCOperations. <<... 5 Acco scaen es aun E 2 3 to 9 Mechanical goods building. ......0.....06.. 0 D 1 2to 6 PEGA Ga OOCSr Lf STPOINE... 65. scares o's cw E 2 3 to 9 oT MR ETE 9% 1's 00d A et Pa D 1 2to 6 Shafting, Pulleys and Other Mechanical Tran» , SREP ar ie ret erie egeuls akc cy Ce RA A cn On G Y IS totes Note that intermediate and auxiliary spaces in interiors require Grade B. I2 ‘ Intensity Foot-Candle Intensity Industrial Classification. Grade: Minimum. Preferable. Sheet Metal Working — Bench? works ordinary... 35 sadtone nen. E 2 ito tf) Bench workee fin. sat aad btias lee eens aye F 3 4 to 12 . Punches, presses, shears, stamps and welders yee 3 4 to 12 Oye} ia tab a }eqeeel Benton ar eens mint UNE Sa checyik en E RI F 3 -€ tor Miscellaneous? miachinesi ts ..2< sn araaisielaveeriele E 2 3 to 9 Lt. Dark. ~Lt; Dark. “Light. Dark. Shoe Manufacturing, Leather and Canvas — - Inspecting and sorting raw ma- terra Mess ones pect eens F G 3 5 4 to 12 Stor ws. RUIN whi eres sag eh Mood Brana s F G 3 5 4 to 12 iio ux Stitching. mrachitie'<.. a... e.0cn G G 5 5 Stes: 8 tO os Sritehine hand % x. Pa icntoetet F G 3 5 4 to 12 SukOe 25 Lasting and welding.....: Me ese nee F 3 3 4 to 12 4 to 12 land tarmac: hoes te Rees E E 2 2 3 to 9 3 to 9 Miscellaneous bench and ma- CHINeMWOPKe Mere Es ates E F 2 3 DtOweg 4°to. 12 Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. Soap Manufacturing — Tee tle housesiancaerne awn ce aae Gee telomere D 1 2to 6 Raat Haters Mepech cue clats aatel chen epee G yy Lito” 3 CPRECTTIONS ness Seah et aran So eet oie aerate Ep Sage ei D 1 2to 6 Stamping, wrapping and packing..:......... E 2 3 to 9 SOApUChIpIemomru ei pve aisuarsasho ty tac ted eoenay D 1 2 to 6 Reva 1 3 58 01d 025 ah a ep erate Rt ir RID Ae Wer pre Se D 1 2to 6 Filling and packing soap powder............ E 2 3 to 9 WARTS ON se tra uae ined eras ean ie B 4 %to 2 Steel and Iron Mills, Bar Sheet and Wire Products — PATO MATICMAGNINES Ys A ' Nemes uation a eet Pe E 2 3 to 9 Giaeoine «OOK cede rcath ane sata e ea nusei ieee e yy 1 to 3 Gasting foots... ... PEP tte rents ant omar toed G \ Isto Soaking pits and reheating furnaces........ B \y Y%to 2 Macksand= heavy vollitions.- sien oes cue eae ee D 1 2to 6 Rode hieimaridecolderollingn neat Hole ees E 2 38to 9 MIRE SGA Wit OVE ps ores Acne Leora Reaeaents E 2 3 to 9 ayaterueinegs agayeled Wea pmeaclkAn meer om ns Oh aoe D 1 2to 6 Shearmon fine: by litte. sso: aoe Roses E 2 ato <9 Pacing and Cleaning? #540 % si. co a Semen D 1 2to 6 Stone Crushing and Screening — Primary breaker oom rsc tate neh ca aeons (G y ito 3 Ruxiliacy “breakers ~ 25 icin se waht we ae i 1lto 3 ‘Belt compeyor (Aubes; tis, a.caairestes aa B 71 %to 2 Screener Ooms Secu cis er ee ee r D uk 2to 6 Chitkec:-s0GiNS 5. + Segusdhe Le Guenter es B %4 %to 2 Trisideho'b sDitisins. cistrs ccpatee pace ee ae eee C i lto 3 Note that intermediate and auxiliary spaces in interiors require Grade B. Industrial Classification. ° Stone Cutting — Machine cutting Sand cutting Carving Polishing Store and Stock Rooms— ~~ Rough stock Medium stock Fine stock Structural Steel Fabricating.........+.....es000. Telegraph — Operating Auxiliary telegraph and dynamo equipment.. Telephones — Textile Mills — Cotton — ©) Pentti Scan GanlAp pin Gaede ire sais re Carding Drawing frame Warping Slashing Dyeing Drawing in Weaving Silk — Winding Throwing Dyeing Lt. Dark. Quilling and warping.... E F WGA Poakvee, tips tiactics S eahiue os F G REST ett hore sro x coessdaac 2 F G W pL eS OLS ble eb ia one ipo eee Bb dle Lene) sre Sates (vie) eb a6 Urle)'p) le O18\'e eh 0, 9) 60,16) #68) 6 ele. = Cree ee Cel 6.018) a0 viel Cle wei ere.-0) ¢ 69 66.6.0, 6040 Oe w Se eiGa, eee enbiere boa te sthoe) sf eke 's we see) a 80. eis eile’. * Shled 6 elle ae) Geto << ps elle » siete 6 ¢ 6) s"0 6.6 S (6) Sya,-0) 97] a) 0) e]_ 018], 6) 60116, © bt: 6 6 0.0 6) 4.614) « She th) Mice be. 6 Sl eee tye Vb vere 88 0c6) m We) BB's ee afiurie: A, Wla@, @ ONS, 6, Oe eke, We:6, 0,0) 0) 66 078 810 @) Bice = SEUNG ae. 0-6) ONS, BieCa Bee ea G3, Se pS \Oy 0 fe.9/en0'p <6 lee 6 Saleh Osx TON OL Mie ibe 1o ere m6, s\ 'anile; afd) fost .o: 6xsle ee 4. Se Sibley. 6 « se 6 00 Intensity Foot-Candle Intensity Grade. Minimum. Preferable. . D if 2 tOae 6 : D 1 2 -to Gs ; E 2 3 to 9 ; E 2 OntOm.19 i G yy tomo , D il 2 to. 6 : E 2 8 to 9 Seite 2 3 to 9 : F 3 4 to 12 E 2 3 to 9 ‘ F 3 ADE Owe 5; D 1 2to 6 : D 1 eaters s E 2 38 to 9 , F 3 4 to 12 A G 5 8 to F D 1 Datous0 2 D 1 2 to" —6 ; D 1 2 ztos 6 : E 2 SatOmey) , D a 2 to -6 ’ D 1 DEO nO : E 2 B to 9 e E 2 onto 9 : E 2 3 to 9 : E 2 DEtOmee : E 2 ato. 9 ; E 2 Sato 219 Lt. Dark. - Light. Dark. 2 3 aioe oa) Peto 3 5 4 to 12 Satoums 3 5 Aatome, 8 to .. Note that intermediate and auxiliary spaces in interiors require Grade B. 14 Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. Woolen— | BPTI CPs Si Pi akin ok on My sen are eae SMart EE E 2 3 to 9 MWiashitie: and: comping.) es cgieatsos So ms E 2 3 to 9. ANT at ch cA RNR ed oO Do oleate tei she D 1 2to 6 Bre TSUN Bie a acentins Mania yer otete ioe heen E » 3 to 9 TOY.CUE 8 ai8s cs Vente al bie eee eae E 2 3 to 9 Lt. Dark: -Lt.-Dark. .Laght. Dark. DRAW NIL + oe Vanaea sehen « E F 2 3 3 t6:— 9 4 to 12 WAT DIR 4 esses caro aes E F 2 3 3:to 9 4 to 12 NVeavin get Swe. eter eos Be oG 3 Bi. 440’ 12. - SS tans: nPerchine: sch Nicaea G G a) 5 Ott SO. ° Intensity Foot-Candle Intensity Industrial Classification. Grade. Minimum. Preferable. Knitting machines, ordinary and nappers E 2 3 to Y Knitting machines, flat and others..... F 3 4 to 12 SOL GARe AIMS, So Niseond call omhae tet aeiiwd take E 2 ate. 9 Tobacco Products — PNA OMEUATIONS: tra g28 £7) Se AbaGla ee eee ere E 2 oto 9 POUL MIME VU GSIE-TROOMGN. : Salona x