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I S : 6990- 1971(Reaffirmed lB87 1I ndian St andard

CODE OF PRACTICE FORDAYLIGHTING OF FACTORY BUILDINGS

(Third Reprint NOVEMBER 1989 )

UDC 628921 : 7254

0 Copyright 1972BUREAU OF INDIAN STANDARDSMANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 11ooO2Gr 7 January 1972

( Reaffirmed 1999 )

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IS:6060-1971I ndi an St andara

CODE OF PRACTICE FORDAYLIGHTING OF FACTORY BUILDINGS

Functional Requirements in Buildings Sectional Committee, BDC 12

Chkman RepresentingMAJ -GEN B. N. DAE

M embers

Engineer-in-Chiefs Branch, Army Headquarters

DR N. K. D. CIIOUDRURY Central BuildingRoorkee Research Institute ( CSIR),DnK.R.R~~(Aftsntst~) _ _ __ _MAJ -GEN B. N. DAS Institution of Engineerr ( India ), CalcuttaSHRIXATI E. S. GHUMAN Indian Institute of Architects, BombaySARI J . M. BENJ AMIN (A&mate )SHRI R. G. GOXEALE National Building Orgamzation ( Ministry of Health,Family Planning, Works, Housing and UrbanDevelopment )SHEIK. R. J ANI ( Alfcmate)DR K. M. VON HEINZ In personal capacity ( 32 Al i parcr oad, Delhi)SERIN. MAWMDER All India Institute of Hygiene & Public Health( Directorate General of Health Services)SR~I A. V. RAO ( Altcmats ).%a~ S. MAJ UMDER Directorate General of Observatories (Ministry ofTourism & Civil Aviation )P~oFG.M. MANDALIA University of Roorkee, RoorkeePBOF RATTAN KUMAR ( Al& mate )SHBI N. S. MANKIHRR National Safety Council, BombaySHRI J . V. MRRTA Engineer-in-Chiefs Branch, Army Headquarters

SHRIS.K.GHOSH (Altematej%iIU 0. P. PWRI Voltas Limited, New DelhiSHR~ B. J . R..r~~~tf~~~~~ Ministry of Labour, Employment and RehabilitationSHRI M. M. RANA Central Public Works DepartmentSHRISAYED S. SHAFI Institute d Town Planners ( India ) , NewDelhiSHHI D. P. SHARMA (Alternate)&RI J . D. SfihSTRI Directorate General of Health Services ( Ministry ofHealth, Family Planning, Works Housing andUrbanDevelopment )San1 K.C. SRIVAS'TAVA National Physical Laboratory ( CSI R ), New DelhiSHHI R. L. Snn~ In personal capacity (A-l/6 Vasunt Vihar,Nao Dcfhi 22 j

( (:0niinued?page )

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUK SHAH *FAR MARC3NEW DELHl tIMlO

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Msmbar RrplarmtiqgSEBI L. G. Tow

fhz1 N. V. SEASTSI ( dtunat# ) Railway Board ( Ministry of Railway )SHBI D. hIl?BA &MEA, Director Genwal, IS1 ( Rvrr-ogsriokmbr )Director ( Civ Engg )

SIcrrtmlSHELI . K. &iJNADeputy Director (Architecture), ISI

DR K. M. VOWHEINZMembers

SXBI J .-C. BHA~AOEAEYAD~S.R.DABSHBI K. R. J~NISEBXM. M. Mrerrr~ (Al&ma&)DB V. N-ABIXW

SIOU S. S. REUBLWSam N. v. SHABTBISopIEBIN!CENDINOENQINEBB

Daylight Standards Subcommittee, BDC 12 : 3

In pemonal capacity ( 32Alip Road, NW D&i)Directorate Genera1 of Ohaervatories, New DelhiNational Physical Laboratory ( CSIR ), New DelhiNationel Buildinga Organization ( Ministry of Health,Family Planning, Works, Howiog end UrbanDeveldpmeut )Cen~~,~%$3ing Research Institute ( C%IR ,Directorate General of Health ServicesRailway Board, Ministry of RailwaysCentral Public Works Department

2

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I ndian StandardCODE OF PRACTICE FORDAYLIGHTING OF FACTORY BUILDINGS

0. FOREWORD0.1 Thisndian Standard was adopted by the Indian Standards Institutionon 15 March 1971, after the draft finalized by the Functional Requirementsin Buildings Sectional Committee had been approved by the CivilEngineering Division Council.0.2 Utilization of daylight for performing any visual task is healthy andeconomical. The amount of light required for satisfactory and strain-freeperformance of the task depends on the nature of task itself and on otherfactors like contrast, detail, fineness of work and visual acuity. Smallvariations of illumination are taken care of by the adjustment of the pupilof the eye but large variations result in undesirable eye strain. Theseconsiderations apart, changes in daylight intensity from sunrise to sunsetprovide a harmonious variation of the visual environment inside or outsidea building normally welcomed in the performance of visual task.0.3 In this country, during most part of the year, the sky is clear and

~sunshine plentiful. Proper utilization of daylighting to get appropriateillumination levels on the working plane in factories will result inconsiderable economy consistent with efficiency of production andworkers well-being. The Central Building Research Institute, Roorkeehas been carrying outresearch and measurements of daylight requirementsfor factory buildings and it is as a result of the investigations made thatthis standard is being prepared.0.4 In the formulation of this standard due heightage has been given tointernational co-ordination among the standards and practices prevailingin different countries in addition to relating it to the practices in the fieldin this country.0.5 This standard is one of a series of Indian Standards on daylighting ofbuildings. Other standards published so far in the series are:

IS : 2440-1968 Code of practice for daylighting of buildings (first revision)IS : 3646 (Part I)-1966 Code of practice for interior illumination:Part I Principles of good lighting and aspects of designIS: 3646 (Part II)-1966 Code of practice for interior illumination:Part II Schedule for values of illumination and glare index

3

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0.6 For the purpose of deciding whether a particular requirement of thisstandard is corn lied with, the final value, observed or calculated, express-ing the result ofpa test or analysis, shall be rounded off in accordance withIS :2-MO*. The number of dgnificant places retained in the roundedoff value should be the same as that of the specified value in this standard.-1.GOPE1.1 This standard deals with dayliihting requirements inside factorybuildiugs in the tropics and various factors that contribute to illuminatronon the working plane.2. TERMNOLOGY2.3 For the purpose of this standard, the terms given in IS : 2440-1968t shallapply-3. REGOBMENDED VALUES OF ILLUMINATION3.1 The recommended values of illumination for various tasks in factorybuilding are given in Table 1. To get daylight factors from lux valuedivide these by 80.

2)

TJIBLE 1 -RECO~ ED VALUES OF ILLUMINATION(c&ures3.1 and4.1)

INDU$TBIAL BUSDIWE ASO I'FtOOlCSSES ILL~INA- DAYLIQEWTION LVX FACTOX(DE?(2)

Gatral Facra~ has8) canteensb) Clo&momac) Entrancu,corridora nd staira

Aimofl Foctis anti Uai&mm Hangusa) srockpsrtsproductionsb) Drilling, riveting, screw fantfming, sheetaluminiqn lryout and template work, wingMetions cowling, welding, rub-amembly, finalar#mbly and inspectionc) Mairamance md repairu ( hangem )

dssnlb~ t.%q.%a) Rough work, for ernmple, frame ably and

rarembly f hewy~ma&ii

(3)150too100450 262300 3-75

300150

. (4)

3-751aI

(Cadd)-----x---

*FtuIea Or rowding off numerical valuea ( revised ) .~jCiodcf practice for daylighting d buildin.gr (first rtisoin ).4

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IS:6060-1971TABLE 1 RECOMMEND ED VALUES OF ILLUMINATION- Contd

it:.(1)

4)

5)

7)

8)

INDUSTRIAL BIJ ILDINQS AND PROCESSES

(2)b) Medium work, for example, machined parts,engine assembly and vehiclebody assemblyc) Fine work, for example, radio and telephoneequipment, typewriter and office machinery

assemblyd) Very fine work, for example, assembly of verysmall precision mechanisms and instrumentsBake&a) Ming and make-up rooms, oven rooma andwrapping roomsb) Decorating and icingBoiler Houw ( I ndustrial )a) Goal and ash handlingb) Boiler rooms:

1) Boiler fronts and operating areas2) Other areas

Bookbindinga) Pasting, punching and stitchingb) Binding and folding-miscellaneous machinesC) Finishing, blocking and inlaying

Boot and Shoe Factor iesa) Sorting and gradingb) Clicking and closing and preparatory operationsc) Cutting table and presses and stitchingd) Bottom stock preparation, lasting and bottoming

and finishinge) Shoe roomsBreweri es and Di stil leriesa) General working areasb) Brewhouse, bottling and canning plantsc) Bottle inspection

ILLUMINA-TION IJ J X

0)300700

1500+

150200

100

1W20 to 50

200380300

1000~780

1800700700

158288

iz:(DF)(4)3-758.75

18-75

188258

1.251.25

825 to 062

2583.753.75

1250875

12508.758.75

1.882.50

Special lighting*Optical aids should be used where necessary.tsupplementary local lighting may berequired for gauge glasses and inst4nrentpanels.ISpecial attentton should be paid to the rolour quality of the light ( Continued )

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ls:60600-1971

ft.(1)9)

10)

11)12)

13)

14)

TABLE 1 RIXJ OMIUEND ED VALUIIS OF I~MNATION - chtdINDUSTMAL Bnm~mos AND Paoamm~s

(2)~nni?ignd hseroing Factoriesa) Inspection of beans, rice, barley, etcb) Preparation, kevle areas, mechanical cleaning,dicing and trimmingc) Canned and bottledgoods: retortsd) High speed labelling linese) Can inspection

Carpsr Factoriesa) Winding and beamingb) Designing, jacquard card cutting, setting pattern,tufting, topping, cutting, hemming and fringingc) Weaving and mending inspection

Ceramics ( seePottery )Chemical Worksa) Hand furnaces, boiling tanks, stationery driers,

stationery of gravity crystallizers, mechanicaldriers, evaporators, filtration plants, mechanicalcrystallizing, bleaching, extractors, percolatorsnitratom and electrolyttc cellsb) Controls, gauges, values, etcc) Control rooms:

1) Vertical control panels2) Control desks

f&colu& and Corfi ctione~ Facrori ua) Mking, blending, boilingb) Chocolate husking, winnowing, fat extraction,crushing and refining and feedingc) Hand decorating, inspection, wrapping andpackingClothing Factonkaa) Matching-upb) Cutting, lewingr

1) Light2) Medium

ILLWINA-TION Lux

(3)450300200300450

15O l-88

loo* l-25200 to 300

300

150200300

4w 562300 3-75450 5.62

DAYLIOETFACTOR(ml

(4)5623752.50375562

2503.75562

250 to 3.75375

l-882.503.75

*Supplementary local lighting may be required for gauge glasses and instrumentpanels.tSpecia1 attention should be paid-to the colour quality of the light.(Cmtiwd)

6

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SLNo.(1)

15)

16)

17)

18)

TABLE 1 RECOIvlMENDED VAhJES OF ILLUMINATION - ContdINDUSTRIAL BUI~DINW AND PFCOCES~E~ IL LUMINA- DAYLI ~ETTION LUX FACTOR

(DF)(2)3) Dark4) Pressing

c) Inspection:1) Light2) Medium3) Dark

d) Hand tailoring1) Light2) Medium3) Dark

Col&ries ( Surface uildings )a) Goal preparation plant:

1) Working areas2) Other areas3) Picking belts4) Winding houses

b) Lamp rooms:1) Main areas2) Repair sections3) Weigh cabins

c) Pan houses

(3)700300450

10001500

45010001500

150100300150100150150

Dairiesa) General working arear 200sb) Bottle inspection Special lightingc) Bottle filling 450

Die Sinkinga) General 300b) Fine 1000Dys Worksa) Reception, grey perching 700*Supplementary local lighting may be required for tight glasses.

(4)8.75375562

12.5018.75

56212501875

1.88l-253-75l-88l-25l-88l-88

2.50

5.62

3.7512.50

875

( Confinued )

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TABIS 1 RECOMMENDED VALUES O@ ILLUMINATION - Cod

z.~NDUEITRIAL Bummms am PFMJ~BE~

(1) b) Wet processesc) Dry Prmd) Dyera officese) Final per&Zig

(2)

18) Elactricify GQurating Sta~ionsrZadecr Lecat~aes4b)

h)

Turbine ballsAuxiliary equipmcn t; battery roomt~, blowem,

auxiliary generaton, switchgear and transformerChambel-8Boiler houses (including operating floorsforma, coal conveyors, pulverizers, 1 plat-eeders,precipitators, soot and slag blowersBoiler house! and turbine bouaeBasementsConveyor ho-, conveyor, gentries and junctiontowersControl roonrs:1) Vertical control panels2) Control deaka3) Rear of control panels4) Switch~housesNuclear reactors and steam raising plants:1) Reactor areaa, boilers and galleries2) Gas Circulator bays3) Reactor cbargejdiibarge face

Ebctrici~ Genmting Stutions: Outdoor hationsa) Coal unloading areasb) Coal rtorage areasc) Conveyorsd) Fuel oil delivery headerse) oil storage tanksf) Catwalksg) Platforms, boiler and turbine decksh) Tramformera and outdoor awitchgear

ILLUDIIW- DAXLIOH?TION LVX FAO~B(DF)(3) (4)XiO* 188

2aO* 2507OQt 875

208ot 2580

200 250100 l-25

70 to 100 038 to 1.55

100 1.2570 888

70 to 180 088 to 1.25

200t0300 25oto375300150150150150208

20205050505050

100

3.751881.88188I.88250

6258258628628620628621.25

*Supplementary IocaI lighting should be u&d where necessary.*Special attention should be paid to the colour quality of the light. ( Continued )

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ISt6060-19nTAB&El RECO MMENDED VALUES OF ILLUMINKMON-Cod

l!:.0)

21)

241

25)

26)

27)

I~~~IALBv~.DIx~sANDP~~~~~~ hLVUIXA-TIOI? ot(2)

Ell@lklg4 Handb) Machine ( JJ8 Die 8inkirig)Fawn Buil dinga D& b)B) M i roomab) Washing and wrilizingroom~,c) Milking-parloun

Flour MUSa) Roller, purifier, silk and packing tloormb) Wetting tabla

ForgesGeAeral

FOWI~& Ja) Charging iloom tumbling. cleaning, pouring,rhaking out, rough moulding and rough core

mkkrgb) Fine mouldiog and core nuking and inspectionGaWgJJ

a) Parking areaa ( interior )b) WyF;pd polishing, grwing, peueral crerviciic) Repairs

Gas WOdJa) Retort nouses, oil gas plants, water gpI plants,

purifiers, coke screening a& coke handlingplants ( indoor )b) Governor-, meter-, comprec.sor-, booster- andexhauater-housesc) Open type plants :

1) Gatwalka2) Platforma

(3)1000

?%I156150

150306

150

150

369

70150300

30 to 50+

100

20.50

Supplementary loerrl lighting nbould be uaesl at importaut pointr.

DAYLIOETFAt_TEOB

PI(4)12C80

0.621.811l-66

l-883-75

3.75

096l-663.75

0.38 to @50

1%

0.250.62

( Conrinu8d9

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TABLEI RECO- B.0 VALum OF lllLuMIIuATl0N--wINDUWJZUALBUILDINQS AND P~octseres ILLVMINA-

TION tVX(2) (3

Gauge aad T RoomsGeneral 7aoclar r we& s and Process.sa) Furnace roon~, bending and urnealing lehnb) Mixing rooms and forming (blowing, drawing,pressing, rolling )

100150

c) Cutting to dze. grinding, polishing and toughening 208d) Finishiig ( bevelling, decorating, etching, rilvwing) 300e) Brilliant cuttingf) Inspection:

1) Gwerd2) Fine

mD.9 Aflnkiqa) Pressing, knitting, 8ort1ng cuttingb) Sewing:

1) Light2) .Medium5) Dark

C) Inspection:I) Light2) &fedium3) Dark

Hoa Mokiaga) Stiffening, braiding, cleaning, refining, fprming,

sizing, pouncing, flanging, f?ni&ing and aroningb) Sewing:1) Light2) Medium3) Dark

a) t&&i.r and flat knitting machines . universalwinderr+, cutting out, foIding aad prq

700208700

300

so0450700450

10001500

158

308450700

300

DAYLIOHTFACTOXPF)(4)

8-75

l-25l-882-503-758-752.508.75

3759755628.755-62

Wti18.75

1.88

3-759628-75

3-75

%uppXementary local lighting and optical tide should be used where necessary.( Conrimwl )

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lS:6060*1971TABLE1 RECOMMEND ED VALUBS OF ILLuMINATl0N-costd

I~JDU~TISIAL TJILDLN~~ XD PBOCE~SEEJ ILLUrXZXA-TIOX?ox(1)

33)

(3)bi) Lock rtitch and overlockii machines I

1) Light2) Medium3) Dark

c) Mendingd) Exa&ning and hand finishiug light, medium andc) Linking or running-on

Inzprttion Shofi (Enginuhg )a) Rough work, for example, counting and roughchecking of rtock partsb) Medium work for example, Go and No-Go ~gaugea nd sub-assembhesc) Fine work, for example, radio and telecommuni-cation equipment, calibrated scales, precisionmechanisms and instrumentsd) Very fine -work, for example, gauging andinspection of small intricate partse) Minute work, for example, very small instruments

34) Iron and S& l Worksa) St;i r rbgangwaya basements, quarries and loadingb) Slab yards, &Ring shop?, ingot stripping, soakiigpits, blast furnace workmg areas and ptckmg andchltzg lines, mechamcal plant and vumpc) Mould preparation, rolling and wire mills, millmotor rooms, power and blower housesd) Slab inspection and conditioning, cold strip mills,sheet and plate finishing, tinning* glavaniamg.machine and roll shopse) Plate inspection

(3)360456766

1566766456

156366760

15603ooW

160160

150266

360

DAYLIQEEFACTOB(DF)(4)37556267516.756-75562

1363756-75

B-753756

Y1.25125

1.662-56

3-75

35)f ) Tinplate inspection

3ewcllnynd Watchmakinga) Tie processesb) Minute processesOptical aids should be used where necessary.

Special ligb ting766. 6-75

3666. 3756 /( Continued

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IS:6969-1971TABLE 1 RECOMMEND ED VALUES OF ILLUlbflNATI0N-6~ntct

SLNO.(1)

36)

37)

33)

3%

W

41)

INDUEWRIALBIJILDINQSND PICOCESSES

(2)C)Gem cutting, polishing and settingLuboratorisJ aad Test &omsa) General laboratories and balance roomsb) Electrical and instrument laboratorjesLaundrks and D& caning Wmksa) Receiving, sorting, washing, drying, ironing( calendering ) and despatchb) Drycleaning and bulk machine workc) Fine hand ironing, pressing, inspection, mendingand spotting

L&thcr Drtusitlga) Vats, cleaning, tanning, stretching, cutting, fleshingand stuffingb) Finishing, staking, splitting and scarfingLui tha workinga) Pressing and glazingb) Gutting,~scarfing and sewingc) Grading and matchingMachine nd F itting Shopsa) Rough bench and machine workb) Medium bench and machine work, ordinaryautomatic machines, rough grinding, mediumbu5ing and poliihing

Motor V&cl8 Plantsa) General sub-assemblies, chassis assembly and carassemblya) Final inspectionc. Trz$s, body club-assemblies and bodycl) spray booths

42) Pati Worksa) General and automatic processes

ILLUMINA-TION LlJX(3)1500*

300450

200200!Ioa

156200

450706

16oW

150So0

300456300456

200

DAYLIGHTFA~OBVW v(4)18.75

3.755-62

2-502-503.75

1.88250

5.62S-75

1230

1SS ;375

975562S-755-62

250*Special attention to colour~quaiity of light may be neees=y.tSpecial attention should be paid to the co~our quality of the light.

(csafiaued)

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ISt6060.1971

SL INDUSTRIALBUILDINQSAND~O~ESSES IL~~MINA-NO. TIOI Lux(1)

43)

44)

(2)b) Special batch mixingc) Colour matching

Paint Skoj ~snd S#raM g Bootha) Dipping, firing, rough 8pr8yingb) Rubbing, ordinary painting, apraying and finirhingc) Fine painting, spraying and tinihiigd) Retoucbiog and matchingPapsr Work8a) Paperandll oardmaki ng:

1) M achine housea, caleml eri ag, pulp mills, pre-paration plants, cutting, 6nkhiog endtrimming

(3)450700*150So0450700,

DAYLIOETF CTOBtDF)(4)5-628.75l-883-759628-75

2) Inspection and sorting ( overhauling )b) Paper converting processes:

-1) Corrugated board, castons, containan andpaper sack manulkture, coating andlamiiting pr-2) Asociated printing

45) Pkammauficats nd Fi ns Ql imrw lWorksa) Raw material storageb) Control laboratoried and testingc) Pharmaceuticals manufacturing: grinding; gramI-lating, mixii and drying, tableting, sterilizingand washing, preparation of solutionr and 6llhg,labelling, capping, cartoning and wrapping andinspection

288 2fi8so0 $75288 250

!lo8 3-75200 250so0 3-75300 3-75

d) Fine chemical manufacture:1) plant proccaaing2) Fine chemical finishing

200 2-50!loo 3-75

Plastics orksa) M anufacture ( seeChemiGl w orks )b) Processing:

1) Calendering and extrusion2) Moulding-compreaaion and injection

Sal !I-75200 !?50

+Special attention rhould be paid to the C&W qmdity of the light.(Coat inwd)

TABLE 1 RECOMMWD ED VALUES OF ILLUMINATION -Con&f

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fs:6060-1971

47)

49)

TABLE1 REiCOMbfENDED VALUES OF lLI.UMlNATlON -CodINDUSTRIAL BUILDINGS AXD PBOOXSIIEE ~LLKJMI~A- DAYLIQET

TION b7X FACTOR(DP)(2) (S) (4)

5) Sheet fabrication:i) Shaping 266 256

ii) trimming, machining, poUing 300 S-75iii) cementing 200 250

Plating Sk+a) Vat and baths, buffing, p&shing and burnishing 150 1gSb) Fiil buffing and polishing Special lighting

Potteryaad C&yProductsa) Grinding, filter pressing, kiln rooms, moulding,pressing, cleaning, trimming, glazing and firingb) Enamelliag, colouring and decoratingPrini iq Worksa) Type foundries:

I) Matrix making, drening type, hand andmachine casting

150 1.8845lw 562

2) Front assembly and sortingb) Printing plant%

1) Machine composition, imposing ntonea2) PrmseaS) Cornporing room4) Proof-reading

c) Electrotyping:1) Block-making, electroplating and washing,backing2) Moulding, finishing and routing

d) Photo-engraving:1) Block-makmg, etching and masking2) Finishing and routing

Rubber Pm&ga) Fabric preparation creelsb) Dipping, moulding, compounding and calendersc) Tyre and tube making

200 2-50456 562200 250so0 575456 562So0 6-75266 256So0 975260 2.56366 975

266 250150 l-88200 250

*Special attention rhould be paid to the colour quality of the light.(CrrJkrwd)

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IS: 6060-19715 TABLE1 RECO MIUENDED VALUEg OF ILLUMINATION-CoatdSL Irtona~a~~L B~LDINQS AXU Paooxcas~~ ILLUMINA- DAYLIGHTNo. TlON LtJX FACTOB(1) (2) (3) (K)

51) &cl Metal warksa) Ben&work, scribing, pressing, punching, shearing, 208 2.50stamping, spinning and foldingb) Sheet inspection Special lighting

52) Sl@FlUtOlka) Kettle houses and ancillaries, glycerine evapora-tion and distillation and continuous indoor soapmaking plants:

1) Generalareas2) Control panelsb) Batch or continuous soap cooling, cutting anddrying, soap milling and ~plodding:

1) Generalareas2) Control panels and key equipment

c) Soap stamping, wrapping and packing, granulesmaking, granules rtorage and handlmg, fillingand packing granules:1) General areas2) Control panels and machines

d) Pdible products processing and packing53) Sirtutt&d s&w1 a6ricatioaPlants

a) Generalb) k4arki ng OfF

W T&i& Mills ( Co&n or Li nen )a) Bale breaking, blowing, carding, roving, dubbing,spinning (ordinary counts ), winding, heckling,spreading and cablingb) Warping, slashing, dressing and dyeing, doubling( fancy ) and spnming ( fine counts )c) IIealding ( drawing-in )d) Weaving:

1) Patterned cloths and 8ne counts, dark2) Patterned cloths and fine counts, light3) Plain grey cloth

e) Cloth inspection

150 1882OOto380 258to375

150 188280 to 300 250 to 375

150 188208 to 300 2.50 to-375

200 250

158 188308 3.75

150 1.88

208 2.50708 8.75700 875300 375208 2.50700+ 875

+$ecial attention should be paid to the colour quality of the light.( Co&mud)

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TABLE 1 RECOMMENDED VALUES OF ILLUMINATION - ContdI~DUSTIUAL-B~~~IN~~ ND F'BOOESSESI ILLUMIXQA-

mon LTJ S(1)55) (2)Tat& h4ius (Silk or Synthetics)a) Se;Atfugitive tinting, conditioning 0I setting

b) Spinningc) Winding, twisting, nwinding and coning, quiltingandsbishing:

56)

1) Light thread2) Da&thread

d) Warpinge) Healding ( drawing-in )f) weavingg) Inspection

Textile M il ls ( Wodh )Scouring, carboniaing, teasing, preparing, raising,brushing, pressing, back-washing, gilling, crab-bing and blowing

(31MO450

266300300700760

looo*

150 163 .b)444

Blendmg, carding, combing (white), tentaring, 266 250drying and croppingSpinning, weaving, winding, warping and combing 450 5-62( coloured ) twisting

Healding (drawing-in ) 766 6-75weaving:1) Fineworsteds 700 II.752) Medium worsteds and fine woollens 456 5623) Heavy woollens 300 3.75

-Burliirg and mendingPerching:1) Grey 760 a.752) Final 2000* 2500

Text& Mills (Juts)a) Weaving, spinning, flat, jacquard carpet looms 200 250and cop windingb) Yam calendar 156 1.63

f)f5)

DAYLICATFACTO(DF)

2.565-62

2503-753756-75a-75

1256

57)

*Special attention should be paid to the colour quality of the light.( Conrinucd1

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IS : 6666 - 197i

SLNo.(1)W

5%60)

61)

W

TABLE 1 BBCOMMBNDED VALUES OF ILLUMDIATlON- ConfdINDU~TBIAL BUILDINQS AND P~OOE~SES IL LU~INA- DAYLIWT

TION LUX FACTOBTobacco F& ori es

All processes(2)

UbholstningFurniture and vehiclesWarehow es and Bul k St oresa) Large material and loading baysb) Small material and racksc) Packing and despatchWel din g and Solderinga) Gas and arc welding and rough spot weldingb) Medium soldering, brazing and spot welding forexample domestrc hardwarec) Fine soldering and spot welding, for example.instruments and radio set assemblyd) Very fine soldering and spot welding, for example,radio valvesWoodwork ing Shopsa) Rough sawing and bench workb) Sizing, planing, rough sanding, medium machineand bench work, gluing veneering andcooperagec) Fine bench and machine work, fine sanding andfinishing

(3) (:;I300* 3.75300 3-75

100 125150 1.88150 l-88

150 1.88300 3.75700 8-75150 1.88

150 l-88200 2.50

300 375

*Special attention should be paid to the colour quality of the light in allprocessing areas.

4. GENERAL PRINCIPLES4.1 The design of openings, glazings and such similar sources of daylightshould be so positioned as to give levels of illumination given in Table 1.4.2 Usually north lights are employed in factories to provide the requiredamount of-illumination on the working plane. It is to be noted that entryof direct sunlight during certain hours of the day may be a source ofdistraction to the workers. The duration of the direct sunlight penetrationfor any given latitude may be asceriained from Table 2. Location ofwork should be such as to avoid glare from the north light glazed openings.

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Is:6060-1971TABLE 2 SUNSHINE HGURS ON NORTH FACING WALL (SGMR TIME)LOCATION Sm 23 AND

(19N. Lat(degr-1-111s151719212s252729SlJSS5

MAEOH 21(2)NilNilNilNilNilNilNilNilNilNi,lNilNilNilNil

Apan. 16 AND MAY 16 ANDAQQWT 27 JULY 28(S) (4)sunrise to sullw 8unrisa to sunset

Up to 1020 hAfter 1346 hUp to 0915 hAfter 1445 hUptoO84OllAfter 1520 hUp to Ok?15hAfter 1545 hUptoO8OOhAfter 1600 hUp to 0740 hAfter 1620 hUp to 0730 hAfter 1630 hU to 0725 hAk 1635 hUp to 9720 hAfter 1640 hUp to 0710 hAfter 1650 hUp to 0705 hAfter 1655 hup to 0700 hAfter 1700 hUptoO65OhAfter 1710 h

do do

do do

U to 1030 hJ er 1530 hUp to0930 hAfter 1430 hUp to 0910.hAfter 1450 h:ts,: YE r:UP to 0830 hAfter 1530 hUp to 0820 hAfter 1540 hUp to 0810 hAfter 1550 hUptoO8OOhAfter 1600 h

JUXIE 21(5)Sunrise to sunsatdo

dododo

Up to 1030 hAfter 1330 hUpto 1OOOhAfter 1400 hUp to 0920 hAfter 1430 hUpto09OOhAfter 1500 hUptoO85OhAfter 1510 hUp to 0830 hAfter 1530 h

NATE- The above timings are based on solar noon. To obtain local times orstandard times proceed accordii to usual methods.4.3 In establishments where work is carried out during dusk hours, thedaylighting should be combined with artificial lighting in such a mannerthat the diminution of daylight is unnoticeable specially for those engagedin precision work involving eye strain.5. LEVEL OF NATURAL ILLUMINATION5.1 A careful interpretation of daylight factors should be made beforedesigning the fenestration. The possibility that the required level ofillumination may change due to a change in the layout caused by modi-fication in production methods should be kept in view.

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1816060-19715.2 n normal circumstances factories should be designed to give adeastl-25 percent. Daylight factor, which may exceed current requirementsover part or whole-of the building.5.3 Obstructions like structural members, overhead installations, verticaland horizontal machines and the like should be considered in relation tothe glazing. It is essential to foresee the proposed layout of the machines,as ignorance of this aspect is likely to cut down the light reaching theworking plane.5.4 There should be a good distribution of light over the whole interior.Unilateral systems should, therefore, be avoided when possible. Lightcolours should predominate on the surface of the interior, wherever practi-cable. In case of north light rooftruss, shadows caused at working planesby machines and operators can be minimized by providing openings in theside walls and/or by use of light coloured finish for ceiling surfaces.6. FENESTRATION6.1 Some examples of methods of fenestration, providing daylight areshown in Fig. 1 to 9 For these figures, the values of daylight factorsinclude sky and reflected openings for the glare design sky, the value of@85 has been assumed for clause transmission:

Fro. 1 CONTINUOUS ORIZONTAL OOF Lm-ms WITHDIFFUSED L.UINO( 17 PERCENT F FLOORAREA)

v w10

51 F- . - \- y+FIG. 2 CONTIMJOUSORIZONTALROOF LIGHTS GLAS AREA

1 -5 PERCENT FFLOORAKEA19

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FIO. 3 SIDE GLAZINO N A MULTI-STORBY&IILDIN~( 50 PERCENT FFLOORAREA)

FIG. 4 SHEDTYPE ROOFWITHCONTINUOUSTRIPS FGLAZING(GLASSAREA 10 PERCENT FFLOORAREA)

105

1E

1051 E

5A Inclined Glazing

5B Vertical GlazingFIG. 5 NORTH LIGHT ROOF LIGHTING GLAZING 20 PERCENTOF

FLOORAREA )20

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1s~: 969 1971

10

5FIG. MONITORRook WITH60 SLOPE GLKZINQ GLASS AREA16PERCENTOF FLOORAREA)

105thFIG. MONITORRook WITHVERTICAL GLAZING1 GLASSAREA~OPERCEN~OFFL~ORAREA)

FIG. Sum GLAZING M A MULTI~TOREY BUILDING Gws AREA~~PERCBNT F FLOOR REA)

105

1EFIG. SHED TYPE ROOF WITHCONTINUOUSTRIPSOF GLAZING

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Isr6060-19716.2 Allowance should be made for anything that may obstruct the lightsuch as tall buildings, overhead equipment and large machines:6.3 The glazing should be regularly cleaned, and means of safe and easyaccess provided for this purpose.6.4 The area of glazing required for any particular level of illuminationwill depend primarily upon the position of fenestration adopted. Therelative efficiency of different methods may be compared by calculatingthe ratio of glazed area to floor area in each case.6.5 Methods using horizontal or low-pitched glazing will generally bemore e5cient than those using vertical or steeply sloping glass.

7. rEDRSIC& PRINCIPLES AND DESIGN AIDS FOR NORTH

7.1 Since most factories employ north light as the principal source for day-lighting it is useful to know the period of the day over which direct sun-light enters such fenestrations. Table 2 indicates the variation of directsunlight entry throughout the year for several latitudes.7.2 When the length of a bay in a north light factory exceeds its width byfive times one may consider it as infinitely low for the purposes of day-lighting.7.3 The uniformity of illumination on the working plane in a north light~factory depends on the width of the bay (distance between the north lightopenings ), the slope of the roof and the reflectance of the ceiling.7.4 The design for saw-tooth fenestrations for 2, 4, 6 or 8 bay factories canbe based on Fig. 10 to 13. The factors that govern the design are givenin 7.4.1 to 7.4.3.

I 7.4.1 Figures 10 to 13 give the computerized results for the total workingplane illumination for the types and sizes of fenestrations expressed aspercentage fraction of floor area. These values are for the centre of thearea in question, for factories with 2,4, 6 or 8 north light openings andwith wall and ceiling reflectances 0.5 and floor reflectance 0.3. 7.4.2 In these calculations a transmission coefficient of 0.85 has beenassumed for the glazing. Presence of dust, sashes or bars, as well as beamsor trusses reduces the illumination and allowance for these have to bemade. Tall machinery and louvres on windows also affect the daylight-ing inside.7.4.3 The values given are for the design sky corresponding to a solaraltitude of 15 and an increase in daylighting occurs when the sun go= upin the sky. AS a general rule on clear days this increase will be between 1.2

to 1.5 times the value given, in Fig. 10 to 13 at noon time. This increaseis attributable to the increase of the total ilhunination on the roof as wellas the increase of the sky luminance.22

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I

8(mWM A&dNfO

N~SNO

_~OMOMOM..

.#

.L

.

-

NVSNO5

1

7.z e

Z ~OMB2 ~HOM0

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------ BAY WIOTH i 7 m- BAY WI&NH i10 m

&-O*15 20 25 30

PERCENT FENESTRATIONFIG. 12 WORK PLANE LLUMINATIONT THE

GENTRE OP ~SBAYSNORTH LIGHTFACTORY;(BKYW~DTH 4m, 7m, 10m)

t- BAY WH)tH =Om

4 IO15 c20 25 3QPERCENT FENESTkATlON

FIG. 13 WORKPLANE ILLUMINATIONATTHECENTRE OF ~-BAYS ~ORTH IGHT ACTORY(BAY WIDTH 4m, 7m, 10m)

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ISr6969-19717.5 OthermTypes of North Lights- Sawtooth, cylindrical shell or foldedplate north ight roofs are common. If the vertical glazed,areas are equal-one may take that sky components from each of the above at any givenpoint inside will be the same in all. Ther? are variations of the reelectedcomponents giving rise to differences in the ultimate performance of eachone of the above roofs. For cylindrical shell roof the decrease in InternalReflected Component is proportional to bay width tihen it goes beyond6 metre.7.6 Other Daytighting Apertwes

7.6.1 Side-Lighting- This is similar to vertical windows and hence themethods given in IS: 24&O-1968* are directly applicable.7.6.2 Horizontal 01 I n& cd Roof LighGg-In either of these types ofopenings direct sunlight will be incident on the fenestrations for part ormost of the day time hours.suggested in IS:2440-19688. Design will have to be for the design timeThe value of total illumination due to sunand sky light may be taken as 16 000 Lux. To effectively diffuse thisillumination in the interior the use of diffusing glasses of,known trans.mission factors is recommended. The final available illununation on theworking plane is calculable by the use of methods employed in artificial

&* hting techniques. I f the area and location of glazed openings areown, the point to point method is suitable.is given the lumen method is preferable. I f the l&&nation required

TABLE 3 ~RANSMISSION FACTORS QF SOME 6LA= ~%ltIALB

&.(1)i)

ii)iii)iv)v)vi)

ti&i)viii)

Tramparent window glassPatterned glassWired rough cast glm

0-w) to 0430.70 to o-33om to fI-60

Sand blasted glauf&au acrylic plastic sheetClear rigid PVCWired rigid PVCCorrugated glass fibre reinforced rhaat

*Cm% of practice for daylighting of building (jffs# m&or4 ).25

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4#60-1971 ._X&3 Transmission factors of -a,f& in T;ible 3. aaenaody used material8 are givenSince there is a l&p vpriety ,of such materials availablecomrprcially, reference to co&he&$ literature for their pqertiea issuggested.

7.7 Glass transmission chasges due to dust.ollection and state of mainte-nance. The maintenance factom for glass under certain conditions aregiven in Table 4.TABLE 4 IbhWBNmQg FACTORS FOR CLASS

SL T%iV3!Or LOOATIOHNo. hblZTXV-- FAOTOB---7

(1) (2) , 69) (4) (5)i) Clean : , o-9 O-8 0.7ii) Industrial o-7;_ O-6 Q-5

iii) Very dirty @6 @5 a-4

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BOMBAY 400095tEal torn I l / l 4 C. I . . Sch.omo VII M, V. I. P. Road,

Manlktola, CALCUTTA 700054Southarn I C. I. T. Campus, MADRAS 600118Northern I SC0 445-446, Sector 35-C,CHANDIGARH 160036brmch Offices I

36-24 9941 24 42

2 18438 1641

Pushpak Nurmohamed Shaikh Marg, ~Khanpur.,AHMADABAD 330001

F Block Unlty Bld~g, Naraslmharaja Square,BANGALORE 56m1

263482 63 49

a2 46 00Gangotrl Complex, Bhadbhada Road, 1. T. Nagsr,

BROPAL 46200386718

Plot No. 82/83, Lewis Road, BHUBANESHWAR 7510085315, Ward No. 29, R. G. Barua Road 5th Byelane,GUWAHATI 781003~8 36 27-

S-E-56C L. N. Gupta Marg, HYDERABAD 5OOgOl 23 10 33R14 Yudhlster Marg, C Scheme, JAIPUR 302005 8 98 32117/418 B Sarvodaya Nagar, KANPUR 208006 _ 21 66 76Patllputra Industrlal Estate, PATNA 800013Hantex Bldg ( 2nd Floor 1, RIY Station Road,TRlVANiDRUM 695001

8 28 067 66 37/nsDeotlon Off ice ( With Sale Point 1 IPushpanjali 205-A West High Court Road.Bharampeth Extension, NAGPUR 440010lnutltutlon of Engineers ( lndle j BulldIng, 1352 Shivall Nagar,PUNE 411005 5 24 85

%a101 Otllcr In Bombay Ir at Novelty Chmnbon, 6rmnt Road,Bombay 00007 89 6Q10?6alrs OlTicr In CalCUltl la at I ChorrrlnghorApproach, ? 0. Pfinemp nww

BUREAU OF INDIAY STANDARDS

Manak Bhavan, 0 Bahadw Shah Zdar Mwg, NEW DELHI 110002Tolophonos I 331 01 31,831 18 78 Tolagrams I Manaksansthr

( Common to all 0fTicos )Aogion~l Officer t*Wastorn I Manakdaya, E9 MIDC, Marol, Andhwl ( East 1,

Tele@mno8 82 92 95