IS 1634: Code of practice for design and construction of wood stairs for houses

13 Pages·1992·1.4 MB·English

by  Bureau of Indian Standards

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IS 1634 (1992): Code of practice for design and
construction of wood stairs for houses [CED 13: Building
Construction Practices including Painting, Varnishing and
Allied Finishing]
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IS 1634:1992

Indian Standard
DESIGN AND CONSTRUCTION OF
WOOD STAIRS FOR HOUSES-
CODE OF PRACTICE
( Second Revision )
UDC 692’622 [ 674’03 I : 69’05

0
BIS 1992
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR &AH ZAFAR MARG
NEW DELHI 110002
ecirP puorG 3
October 1992
gnidliuB noitcurtsnoC secitcarP lanoitceS ,eettimmoC CED 13
DROWEROF
sihT naidnI dradnatS ( dnoceS noisiveR ) was adopted yb the uaeruB of naidnI ,sdradnatS after the
draft dezilanif yb the gnidliuB noitcurtsnoC secitcarP lanoitceS eettimmoC had neeb devorppa yb
the liviC gnireenignE noisiviD .licnuoC
rebmiT si na tnatropmi larutcurts lairetam ni gnidliub work, hcihw si nwonk for sti evitaroced
eulav htiw a elbanosaer tnuoma of htgnerts dna .ytilibarud tI has neeb desu morf emit lairomemmi
ni the noitcurtsnoc of .sgnillewd rebitiT noitcurtsnoc has na tnatropmi part ot yalp ni the evisnetxe
gnidliub seitivitca that ruo yrtnuoc snh .nekatrednu ,tuB as the secruoser for rebmit are ,detimil
ti si yrassecen ot ezilanoitar the esu of rebmit dna evresnoc ti ot revetahw tnetxe elbissop tnetsisnoc
htiw the deriuqer .ecnamrofrep oT evres siht ,tcejbo a seires of sdradnats ni the mrof of code of
secitcarp for rebmit noitcurtsnoc has neeb .deussi sihT dradnats sevig ecnadiug for the esu of
,rebmit ni ,sriats hcihw si a lapicnirp tnenopmoc of gnidliub .noitcurtsnoc
ehT ngised of wood sriats si ni on yaw detacilpmoc dna tsom of the larutcurts ,snoisnemid hcus as
sessenkciht of ,sknalp sezis of stsioj dna ,sgnrliar etc, as yllareneg desu are llew evoba the htgnerts
.stnemeriuqer tuB lareneg ,snoisnemid ,yleman the htdiw of ,esacriats the esir dna tread of steps,
the hctip ,elgna the htgnel of ,thgilf etc. are detaler ot lareves aspects of namuh trofmoc ni the esu
of ,sriats dna yeht evah neeb depoleved as a tluser of gnol .ecneirepxe lareveS secitcarp liaverp ni
siht respect, ylniam ni the mrof of bmuht selur dna these evah neeb denimaxe ot evirra at the
mrofinu ecitcarp dial nwod ni siht dradnats laicepS noitaredisnoc has neeb nevig ot the noitseuq
whether the rebmun of steps or the thgieh dluohs eb the noiretirc for ngised of a thgilf dna after a
luferac ,yduts the lanoitceS eettimmoC elbisnopser for the noitaraperp of siht dradnats has emoc ot
the noisulcnoc that lacisyhp noitrexe setaler ot the snoisnemid of each step dna the rebmun of steps
rather naht ot the latot thgieh of the .thgilf
sihT naidnI dradnatS was tsrif dehsilbup ni 1960 dna yltneuqesbus desiver ni 1973, hcihw dedulcni
stnemeriuqer gnitaler ot htdiw of ,sriats thgieh of sliar-dnah dna htdiw of treads, rebmun of ,sresir

etc, dengila htiw the snoisivorp ni the lanoitaN gnidliuB Code of 1970. stnemeriuqeR detaler ot

noitcurtsnoc of deson-llub step, ,gnidnal etc, had osla neeb .detaroprocni sihT noisiver has neeb
dengila htiw the tnaveler snoisivorp ni lanoitaN gnidliuB Code of ,aidnI 1983.
nI the noitalumrof of siht dradnats eud egathgiew has neeb nevig ot lanoitanretni noitanidro-oc
gnoma eht standards and secitcarp gniliaverp ni tnereffid seirtnuoc ni noitidda ot gnitaler ti ot eht
secitcarp ni eht dleif ni this .yrtnuoc
roF the esoprup of gnidiced whether a ralucitrap tnemeriuqer of siht dradnats si deilpmoc ,htiw
the lanif ,eulav devresbo or ,detaluclac gnisserpxe the tluser of a test or ,sisylana llahs eb dednuor
off ni ecnadrocca htiw SI 2 : 1960 seluR‘ for gnidnuor off laciremun seulav .‘)desiver( ehT
rebmun fo tnacifingis secalp deniater ni eht dednuor ffo eulav dluohs eb eht emas as that fo eht
deificeps eulav ni this standard.
SI 1634 : 1992
Indian Standard
DESIGN AND CONSTRUCTION OF
WOOD STAIRS FOR HOUSES-
CODE OF PRACTICE
( Second Revision )
1 SCOPE 3.8 Hand Rail
A dedluom rebmem gninnur lellarap ot the
1.1 sihT dradnats syal nwod the stnemeriuqer for
gnison enil or .gnidnal
,lairetam ngised dna noitcurtsnoc of roiretni wood
sriats for .sesuoh
3.9 Landing
1.2 sihT stardard does ton revoc the ngised dna gnidnaL si a mroftalp neewteb two sthgilf -divorp
noitcurtsnoc of ,latnemunom evitaroced dna ed ot evres as a rest ,dna nehw deriuqer ot ekam
other laiceps sepyt of wood .sriats evitceffe noisivorp for gninrut a .riats sihT mret
si osla deilppa ot the noitrop of the roolf tnecajda
2 SECNEREFER ot the top of a .riats
ehT naidnI sdradnatS detsil ni xennA A are 3.10 leweN
yrassecen stcnujda ot siht .dradnats
A post decalp at the noitcnuj neewteb a thgilf of
3 YGOLONIMRET sriats htiw a gnidnal or .roolf
3.0 eht’roF esoprup of siht ,dradnats the -wollof 3.11 Nosing
gni snoitinifed llahs .ylppa ecnerefeR yam osla
ehT detcejorp edge of a tread, yllausu .dedluom
eb edam ot .giF 1 dna 2 for .noitanalpxe
3.12 hctiP
3.1 sretsulaB
ehT elgna neewteb the enil-hctip dna the
ehT lacitrev srebmem hcihw troppus the -dnah
.latnoziroh
liar dna protect the nepo edis or sedis of a .riats
3.13 eniL-hctiP
3.2 edartsulaB
ehT demarf ecnef demrof yb na retuo gnirts or a ehT enil gninioj the noitcesretni of the face of
latnoziroh gnitroppus ,rebmem a liar-dnah dna each resir dna the top of each tread.
the .gnillifni
3.14 esiR

3.3 desoN-lluB Step
esiR of a step si the lacitrev ecnatsid neewteb the
A step htiw a dednuor-retrauq or dednuor-flah tops of two evitucesnoc treads, dna esir of a
,dne at the mottob of a .thgilf thgilf si the latot thgieh morf roolf ot ,roolf roolf
ot gnidnal or gnidnal ot gnidnal as the case
3.4 egairraC or egairraC Bearer yam .eb
nA denilcni nedoow rebmem decalp tsniaga the
3.15 resiR
edisrednu of steps ot add troppus neewteb the
.sgnirts ehT tnorf lacitrev noitrop of a step ot hcihw the
tread si .detcennoc
3.5 thgilF
3.16 hguoR Brackets
A suounitnoc seires of steps gnidnetxe morf roolf
ot ,roolf roolf ot ,gnidnal or gnidnal ot .gnidnal Short seceip of draob dexif ot the egairrac of a
riats ot evig lanoitidda troppus ot the treads.
3.6 Glue Blocks
3.17 sriatS
ehT seceip of rebmit dexif morf htaenrednu as
sreneffits at the noitcnuj of the tread dna .resir A set of steps gnidael morf eno roolf ot .rehtona
3.7 Going 3.18 esacriatS
gnioG or nur of the step si the latnoziroh ecnatsid sriatS together htiw the part of the gnidliub
neewteb the faces of two evitucesnoc .sresir gnitadommocca .meht
1
IS 1634 : 1992
WINDERS
OUTER STRING
_L- NO 6
STEP
GLUE BLOCKS AND SRESIR VGLUE BLOCKS
SHOWN FOR TWO TREADS ONLY FLIGHT d
P LA N
WREATH OR
SWAN’S NECK
I
YY
/~/SECTION

ii iN ALTERNATIVE) ’
;
CLOSE STRING s
b
-BALUSTERS :
LINE OF NOSING
, CARRIAG
II
POST
OR
SECTION XX
FIG. 1 DETAILS OF WOODEN STAZRCASE
2
1634 : 1992
PITCH--\
PITCH LINE
FIG. 2 DETAILS OF TREAD AND RISER GNIWOHS ALSO THEIR
FITTINGS INTO A CLOSE STRING
.dedivorp ehT rebmit llahs eb treated ni -drocca
3.19 String
ecna htiw the tnaveler snoisivorp of SI 883 : 1992
The denilcni rebmem or draob gnitroppus sresir ( under revision ).
dna treads.
4.2 ehT doowylp desu ni the noitcurtsnoc of
3.19.1 Outer String wood sriats llahs eb of RWB ytilauq (see SI 303 :
The end gnirts fo a thgilf of sriats hcihw si ton 1989 ).
attached ot the llaw for .gnitroppus ehT other
epyt of dne gnirts attached ot llaw si llaw‘ .’gnirts 5 GENERAL DIMENSIONS AND
ARRANGEMENT
3.19.2 esolC String
5.1 Headroom
nA retuo gnirts gnivah sti top dna mottob edges
thgiarts dna .lellarap ehT sriats llahs eb so dengised as ot edivorp for a
moordaeh of at tsael 2’2 m as derusaem yllacitrev
morf ,gniliec ,tiffos etc, ot the ,enilhctip dna osla
3.19.3 Cut String
edivorp for a ecnaraelc of at tsael 1’5 m at thgir
An outer gnirts htiw sti reppu edge tuc ot the aelgna ot the .enil
eliforp of treads dna .sresir
5.2 Pitch
3.20 Tread
ehT hctip llahs eb ton erom naht 37”.
ehT latnoziroh rebmem hcihw smrof the reppu
ecafrus of a step.
5.3 Going and Rise
3.21 Winders 5.3.1 ehT gniog llahs eb ton ssel naht 250 .mm
gnitaidaR steps ot mrof a egnahc of ncitcerid
5.3.2 ehT thgieh of resir llahs ton exceed 190 .mm
morf eno thgilf of steps ot .rehtona
5.3.3 ehT esir dna gniog llahs eb the emas for lla
3.22 Wreath or Swan’s Neck steps ni yna eno .thgilf
A enalp suounitnoc evruc demrof ni sliar-dnah at
snoitcnuj where the thgilf segnahc .noitcerid 5.3.4 ehT gniog dna esir llahs mrofnoc ot the
gniwollof laciripme :selur
4 MATERIAL a) ehI eulav ’GSR2‘ llahs eb neewteb 530
dna 630 ;mm dna
4.1 The species of rebmit desu ni the noitcurtsnoc
of nedoow sriats llahs eb those elbatius for -noc‘
)b ehT eulav ‘R x ’G llahs eb neewteb
lanoitcurts ’sesoprup as nevig ni SI 399 : 1963. 40 x 3OI 3mm dna 50 x 10” ,3mm
,revewoH for treads, rebmit of ytisned ton ssel
naht 600 3m/gk as nevig si SI 399 : 1963 llahs eb where R si the ,esir dna G si the .gniog
3
IS 1634 : 1992
5.4 sdaerT llahs eb ton ssel naht 270 mm ni 6.3 Treads, Risers and Strings
.htdiw riehT sgnison llahs tcejorp dnoyeb the
sdaerT dna sgnirts llahs eb of dilos ;rebmit dna
face of sresir yb ton ssel naht 15 mm dna ton
nehw of erom naht eno eceip ni ,htdiw yeht llahs eb
erom naht the ssenkciht of tread, dna the eliforp
denioj htiw deugnot dna devoorg .tnioj nI stnioj
of the gnison llahs eb dednuor morf the top
ekil deugnot‘ dna ’devoorg or ecitrom‘ dna ’nonet
.ecafrus ehT suidar of the eson dluohs ton
where seciverc are ylekil ot ,rucco the ecafrus of
exceed 100 .mm ehT treads llahs eb detcurtsnoc
wood ni htob seceip that lliw niamer neddih after
dna deniatniam ni a rennam ot tneverp .gnippils
’gninioj‘ llahs eb treated htiw a elbatius -avreserp
;evit or the seciverc llahs eb delaes htiw na
5.5 htdiW of Stairs devorppa lairetam hcus as etihw‘ dael ’dnuopmoc
ehT htdiw of sriats raelc neewteb edisni ot edisni ot tneverp access ot .erutsiom Each eceip of
of the dne sgnirts llahs eb ton ssel naht I’0 .m rebmit llahs eb ton ssel naht 80 mm ediw no the
dehsinif face of the work. nI a tread, the tnorf
5.6 Width of Landing eceip no hcihw the gnison si demrof llahs eb ton
ssel naht 90 mm .ediw
ehT htdiw of gnidnal llahs eb ton ssel naht the
htdiw of .sriats 6.3.1 sresiR llahs eb of dilos rebmit or of -ylp
wood. ehT top of the sresir llahs eb deugnot
5.7 htgneL of sthgilF dna ,dettif or rieht lluf ssenkciht desuoh ot a
muminim depth of 6 mm otni the edisrednu of
ehT rebmun of sresir ni yna eno thgilf llahs eb
the treads.
ton erom naht 12.
6.3.2 sresiR dna treads llahs eb dekcolb-eulg htiw
5.8 sredniW
elgna skcolb ton ssel naht 80 mm gnol dna 40 mm
sredniW llahs eb dediova as far as .elbacitcarp ediw deulg ni .noitisop ehT gnicaps neewteb
,sredniW reverehw ,dedivorp llahs eb at the eulg skcolb llahs ton eb ssel naht 250 .mm
mottob of the .thgilf eerhT sredniw llahs eb
degnarra ot ypucco a retrauq space dna xis ot
6.3.3 ehT rewol edges of sresir llahs eb dexif ot
,ypucco a flah space.
treads htiw No. 10 wood screws gnimrofnoc ot
SI 451 : 1972 at slavretni ton gnideecxe 250 .mm
5.9 thgieH of liaR-dnaH
ehT htgnel of screws llahs eb at tsael lauqe ot
ehT lacitrev thgieh morf the enil-hctip ot the top eciwt the ssenkciht of the lairetam hguorht hcihw
of yna gnipols liar-dnah llahs eb ton ssel naht yeht are ,dexif dna ni yna case ton ssel naht
1’0 .m 32 .mm
6 NOLTCURTSNOC 6.3.4 nI the case of esolc ,sgnirts the treads dna
sresir llahs eb desuoh ot a depth of ton ssel naht
6.1 ehT ngised dna noitcurtsnoc of nedoow 15 mm otni tapered sgnisuoh ni the sgnirts dna
srebmem ni the sriats llahs mrofnoc ot SI 883 : yleruces wedged dna deulg ( see .giF 2 ).
1992 yllareneg except for the stnemeriuqer ni 6.2
ot 6.6. 6.3.5 sgnirtS llahs eb of ton ssel naht 250 mm
6.1.1 ehT ngised of nedoow srebmem ni the ni lanimon depth. yehT llahs eb denonet dna
sriats llahs eb desab no SI 875 ( Part 1 ) : 1987 prepared for gninnip ot slewen where these .rucco
dna SI 875 ( Part 2 ) : 1987. ehT snonet llahs eb ton ssel naht 15 mm kciht
dna 50 mm .gnol
6.2 ssenkcihT of srebmeM
6.3.5.1 eiT rods gnitcennoc the sgnirts at elbatius
nehW the htdiw of sriats si ton erom naht 1’2 ,m
slavretni yam eb dedivorp fi deredisnoc .yrassecen
the dehsinif ssenkciht of the srebmem llahs eb ton
ssel naht the :gniwollof
6.3.6 ehT devruc noitrop of resir ni the rewol
Member Finished Thickness, steps yam eb desonllub of ralucric-imes dna llahs
mm eb tliub morf dilos skcolb ,dellewod deugnot-ssorc
dna deulg as nevig ni 6.4.
a) daerT 32
for wood 16
)b resiR 6.3.7 Carriage Bearers
/ for doowylp 9
c) gnirtS 28 erehW egairrac sreraeb are ,desu yeht llahs ton
eb tuc tub the treads dna sresir llahs eb dexif no
NOTE - erehW eht htdiw fo esacriats sdeecxe 1’2 ,m ot meht yb snaem of llams elgna skcolb or hguor
eht ssenkciht fo sdaert dna sresir yam ab desaercni
.stekcarb ehT ezis of the egairrac reraeb yam
yletairporppa sa deriuqer yb ;ngised ro egairrac dna
hguor stekcarb yam eb desu rof lanoitidda troppus fo eb 50 mm X 180 mm for a htdiw of 1’4 ,m dna
eht .spets the ezis yam eb yletairporppa desaercni for regral
shtdiw ni ecnadrocca htiw stnemeriuqer of .ngised
6.2.1 ehT other sliated llahs eb ni ecnadrocca erehW the htdiw of esacriats exceeds 2’4 ,m two
htiw :3.6 egairrac sreraeb llahs eb .dedivorp
4
IS 1634:1992
6.4 depahS Ends to Steps 6.4.4 ehT top edge of yreve resir llahs eb desuoh
or deugnot otni the edisrednu of the tread as
6.4.1 erehW a deson-llub or ralimis shaped dne deificeps ni 6.3 dna nwohs ni .giF 2 gnola the
ot a resir si detcurtsnoc htiw a kcolb against elohw of the thgiarts part of sti face.
hcihw the dne or sdne of eno or two thgiarts
parts of the resir ,tuba the gniwollof sliated llahs 6.4.5 ehT shape of the tnorf edge of the tread of
eb :deifsitas yna step llahs ylreporp agree htiw that of the
resir or esiwrehto yfsitas the stnemeriuqer of the
a) ehT niarg of the kcolb llahs eb .latnoziroh ngised dna the gnison llahs eb of proper noitces
ehT secaF of kcolb dna thgiarts resir where .tuohguorht
yeht teem llahs eb hsulf htiw eno rehtona
sselnu the ngised esiwrehto ;seriuqer 6.4.6 erehW so ,derised nedoow gnidraob yam eb
dexif ot the edisrednu of the tiffos ot evig a talf
b) ehT gniteem edges of kcolb dna thgiarts .ecnaraeppa
resir no the face of the work llahs mrof a
ylesolc dettif lacitrev ;tnioj dna 6.5 Landing
4 ehT sdne of kcolb dna thgiarts resir llahs
gnidnaL llahs eb demrof of rebmit sknalp -pus
eb so dettif dna ,dexif together yb gniugnot
ported revo a metsys of rebmit .stsioj ehT -snoc
dna ,gnivoorg ,gnitaber ,gnikcolb ,gniulg
noitcurt of gnidnal llahs mrofnoc ot SI 3670 :
,gnilian gniwercs ro/dna other ,snaem as ot
1966 dna SI 5389 : 1969.
eruces etauqeda htgnerts dna .ytidigir
6.6 Newels
6.4.2 erehW a ,deson-llub flah dnuor or ralimis
shaped dne si demrof yb gnittuc yawa lairetam A lewen llahs eb decalp at yreve ralugna egnahc
morf the kcab of a dilos resir ot evael a reenev of the noitcerid of the .liar-dnah retuO slewen
hcihw nac eb tneb ot the deriuqer shape, the llahs evah lanimon lanoitces-ssorc area of ton ssel
gniwollof sliated llahs eb :deifsitas naht 6’0 X 3OI .’mm llaW slewen fi yna llahs
evah a lanoitces-ssorc area of ton ssel naht
a) ehT reenev llahs eb dettif htiw a dilos 2’5 x 3OI .2mm ,sdaerT ,sresir sredniw dna sdne
gnikcab .kcolb ehT kcab of reenev dna of steps llahs eb desuoh otni slewen ot a depth of
the face of the kcolb llahs eb so prepared ton ssel naht 15 .mm sleweN llahs eb desitrom
dna dettif dna deulg together as ot eruces dna draw ,derob where ,deriuqer ot eviecer the
etauqeda noisehda revo the elohw area of ,sgnirts dna desitrom ot eviecer the sliar-dnah yb
the ;reenev dna snaem of .slewod
)b ehT kcolb llahs eb so dexif ot the thgiarts
( decudernu ) parts of the resir as ot eruces 6.7 Hand-Rails and Balustrades
etauqeda htgnerts dna .ytidigir
sliar-dnaH dna sedartsulab llahs eb so dengised
dna detcurtsnoc as ot edivorp a proper degree of
6.4.3 erehW a resir htiw a ,deson-llub flah dnuor ytefas dna ytidigir ni .esu sliar-dnaH ,yam -erp
or ralimis shaped dne si demrof htiw niht -ylp ,ylbaref eb dedivorp htiw wreath dna evruc
wood tneb ot shape gnirud erutcafunam of the reverehw there si a egnahc ni noitcerid for the
sriats the gniwollof sliated llahs eb :deifsitas .thgilf sliar-dnaH llahs eb of at tsael 100 mm top
.htdiw ehT space neewteb the liar-dnah dna the
a) ehT face of the etelpmoc resir llahs tsisnoc
gnirts llahs eb deipucco yb nepo or dilos -sulab
of eno eceip of doowylp or, ,ylevitanretla
trade or other gnillif as yam eb .deriuqer nO
of a dilos thgiarts noitrop htiw doowylp
the llaw ,edis the liar-dnah yam eb yldigir dexif
for the devruc ,noitrop dna htiw doowylp
ot the ,llaw dna ti llahs eb at the emas level as
esolc detnioj ot the edge of the thgiarts
the liar-dnah no the .edisretuo No sedartsulab
noitrop dna ylreporp deruces ot the dilos
llahs eb dexif ot .ti
;gnikcab dna
6.8 laicepS serutaef of noitcurtsnoc of wood
)b ehT thgiarts parts of the resir llahs evah
sriats for erif ytefas llahs mrofnoc ot the tnaveler
dilos sgnikcab ton ssel naht 20 mm .kciht
snoisivorp of 1s 1642 : 1989 dna SI 1643 : 1988.
ehT devruc part of the resir llahs eb dekcab
rehtie htiw a dilos kcolb or htiw three
shaped latnoziroh gnikcab seceip each ton 7 FINISHIPU’G
ssel naht 20 mm .kciht ehT suoirav parts
llahs eb so prepared, dettif dna dexif -ot 7.1 esacriatS yam eb ylbatius dehsilop or detniap
gether yb gniulg dna gniwercs as ot eruces where so deificeps t see SI 2338 (Part 1 ) : 1967
etauqeda btgnerts dna .ytidigir dna SI 2338 ( Part 2 ) : 1967 1.
5