इंटरनेट मानक

Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.

“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न' 5 तरफ”

Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”

IS 1361 (1978): Specification for steel windows for

industrial buildings [CED 11: Doors, Windows and Shutter]

“!ान $ एक न' भारत का +नम-ण”

Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह”

है”
ह
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
 IS : 1361 - 1978
(Reaffirmed 2006)

Indian Standard
SPECIFICATION FOR ST.EEL WINDOWS
FOR INDUSTRIAL BUILDINGS

( First Revision)

Seventh Reprint SEPTEMBER 2007

( Including Amendment No. 1&2 )

UDC 69.028.2.014.2 : 725.4

© Copyright 1978
BUREAU OF INDIAN STANDARDS
MANAK BHAVA N , 9 B A H A D U R SHAH ZAFAR MARG
NEW DELHI 110002

Gr 5 July 1978
 IS I 1-361 • 1978

Indian Standard
SPECIFICATION FOR STEEL WINDOWS
FOR INDUSTRIAL BUILDINGS

( First Revision)
Doors, Windows and Shutters Sectional Committee, BDO 11

Chairman
SHRI T. S. NARAYANA RAO
93 ' ARUNA • East Road,
Basavangudi, Bangalore
Member» RIFtS tnt ing
SHIU II. S. ANAND Anand Industries Ltd, New Delhi
SH.KI P. N. ANAND (Alternate)
Snnr J. S. BEDt Hopes' Metal Windows ( India) Ltd, Calcutta
SHRI A. K. SOB'I.'r ( Alternate )
DEPUTY DIR~CTOR STANDARDS Ministry of Railways ( Railway Board)
( ARCHI'.rXCTURE ), RDSa
SHIU L. N. DOXANIA Federation of Indian Plywood and Panel Industry,
New Delhi
EX~CUTIVE DIRKC'l'OR ( Alternate)
SUR I P. G. GANDHI Swastik Rolling Shutters and Engg Works,
Bombay
SHUI C. A. SHAH ( Alternate)
HOUSING BOARD ENGINEER 'rami! Nadu HousingBoard, Madras
EXECUTIVE ENGINEER, CENT-
RAL DIVISION ( Alternate)
SHUI H. N. KHAMBATA Godrej & Boyce Mfg Co Ltd, Bombay
DU.JOSEPll GBORGE Indian Plywood Industries Research Institute,
Bangalore
DR H. N. J AOA1>EESH ( Alternat«)
SURI M. T. KANSS Directorate General of Supplies and Disposals,
New Delhi
SURI M. K. LAKHANI Maharashtra Housing Board, Bombay
SHRI K. S. LAULY Indian Plywood Manufacturing Co Ltd, Bombay
SURI P. V. MEHTA Directorate General of Technical Development,
New Delhi
SURI P. N. MEHROTRA Ministry of Home Affairs
SH.lU R. D. MENON Diana Rolling Shutters ( Madras). Madras

( CotUinu6d on /Jag' 2 )

@ Copyrighl 1978
BUREAU OF INDIAN STANDARDS
This publication is protected under the Indi4n Copyright Ad (XIV of 1957) and
reproduction in whole or in part by any means except with written permission of the
publisher shall be deemed to be an infringement of copyright under the said Act.
IS: 1361 • 1978
( Ce-1Itinued from page 1 )
Members Representang
SHJU M. M. MUSTRY National Buildings Organization, New Delhi
Saar H. K. JAGWANI (Allnul,)
SoHRI J. S .. PARMAR. Mysore Commercial Union Ltd, Bangalore
Sum K. PURXAYASTHA Indian Aluminium Co Ltd, Calcutta
SHRI R. K. MEHTA ( Alternate)
SHRI V. P. RAORI Indian Institute of Architects, Bombay
RE7BESENTATJVE Karnataka Housing Board, Bangalore
SURI K. G. 3ALVI Hindustan Housing Factory Ltd, New Delhi
SURI K. C. AOA.HWALA ( Alternat, )
SURI K. SANKARAKB18HNAN Kutty Flush Doors &. Furniture Co Ltd, Madraa
SHRI C. S. DORAIRAJA ( Alttr1lQt,)
SUR) A. C:. SEKJIAR Forest Research Institute &. Colleges, Dehra Dun
SURI A. S. GULATI ( AII.f,",t, )
SENIOR ARCHITECT, B (I) Central Public Works Department, New Delhi
SURI 1\1. S. SIALI Engineer-in..Chief's Branch, Army Headquarters,
New Delhi
Sunr IVI. V. SATHl!: ( Alternat« )
S.lUi.I P. K. S,NGHLA Builders" Association of India, Bombay
SHRI T. C. SOLANKI Indian Metal Window Association, Bombay
SHIH M. P. SHAH (AlI"rJllle)
SHit! P. N. SIUVASTAVA The Institution of Engineers ( India ), Calcutta
SHKJ G. R. SUNUX1t,Al\I Man Industrial Corporation Ltd, jaipur
SHIH K. R. ANANTHASWAMY (Altn-nate)
SHRJ B. K. TtAUl Central Buildings Research Institute (CSIR),
Roorkee
SIlRI T. N. GUPTA (Alternate)
SUUI H. rrUOMSON Sitapur Plywood Manufacturers Ltd" Sitapur
SHRI G. W. M. WHITTLE ( Allano" )
SURI T. N. TIKKU Albion Plywood Co Ltd, Calcutta
SHRI D. AJITHA SIXHA, Director General, lSI ( Ex-officio Memhn)
Director (Civ Engg )
Secretary
SHIlIJ. R. ~IEHTA
Deputy Director ( Civ Engg ) J lSI

2
 AMENDMENT NO.1 JULY 1983
TO
IS : 1361-1978 SPECIFICATION FOR STEEL
WINDOWS FOR INDUSTRIAL BUILDINGS

( First Revision J
Alterations

( Page 7, clause 5.2) - Substitute the following for the existing

clause:
c 5.2 Tolerances - The manufacturing tolerances of the industrial win-
dows shall be such that the overall dimensions as shown in Fig. 1 shall not
vary by more than 3 rom '.
(Page 7, clause 6.4) - Substitute the following for the existing
clause:

'6.4 Glass panes shall conform to IS: 2835-1977 Specification for flat
transport sheet glass ( second 'fl.ision) or IS: 5437 -1969 Specification for
wired and figured glass as may be required. All glass panes shall have
properly squared corners and straight edges.
 ( F'ag« 10, Fig. 3 ) - Substitute the following for the existing figure:

HORIZONTALLY CENTRE -HUNG

BELOW CENTRE OR TOP HUNG

HORIZONTAllY
CENTRE-HUNG
ABOVE CENTRE
OR BOTTOM-HUNG
OR TOP-HUNG

SIZES

HORIZONTALLY CENTRE -HUNG

ABOVE CENTRE OR BOTTOM-HUNG

INSIOE

~.

HORIZONTAllY CENTRE -HUNG

BELOW CENTRE OR TOP - HUNG

HORIZONlALLY
CENTRE-HUNG
BELOW CENTRE
TOP.HUNG OR
BOTTOM-HUNG

-------- ---------- SIZES

Flo. 3 SECTIONAL DETAILS THROUGH SASHES

i Pag» 11, clause 8.1 ) - Substitute the following for the existing
clause:
• 8.1 Holes for fixing and coupling sashes shall be provided in the web of
the outside frame sections (and of the outer ventilator frame sections

2
where these occur at the per imetre of t he sash) as shown in Fig'. ·1.
These holes shall be of n mrn diameter, countersunk and shall be located
14 mrn from the outside face of the frame section in position as shown
in Fig. 5. '
( Page 11, clause 9.5, first lint) - Substitute C sher ard izcd I JOT
, standardized'.
( Page 13, Fig. 5 ) - Substitute the following for the existing figure:
SASH VENtS
DRilL AND
TAP M6 "\
\
li \
\

(A)

19

CORD NOT APPLICABLE TO

BOT10M HUNG VENTILATORS

19

(A) Preparation for sprjn3 catch on horizontaJJy pivot ed and bottom hung ventilators
(B) Preparation for pu l l e y and cor d-ey e on bor izon ta ll y pivoted ventilators
r';OTE - Mast ir should be applied to j"inu where hatching shown,

All d irncnsions in m il l imctr es,

FJo. 5 SPRING CATCH, PULLEY AND CORD·EvE

 ( Page 17, clause 9.9 ) - Substitute the following for the existing
clause:
c 9.9 Two spr iog glazing clips per pane shall be provide d for putty glaz-
mg. These shall be made of spring steel to the design shown in Fig, 11. J
(Page 17J clause 10.1, third line) - Substitute C 25 rom t for
'20 mm '.
(Page 17, clause 11.1, second sentence) - Substitute the following
for the existing sentence:
'Allowance for clearance has already been made while arriving at the
sizes of glass panes given in the table.'

Acldead.

(Pace 16, clause 9.7 ) - Add the following new matter at the end
of 9.7:
, Lugs shall be manufactured from 3-15 mm thick mild steel sheet. '
( Pag« 17J clause 9.9) - Add the following new clause after 9.9:
, 9.10 Sashes may also be prepared for bead glazing made from either
9·S X 9 5 mm aluminium channel of 1 rom thickness or 9-5 X 9 5 mm
pressed steel channel of 0-375 to 0-45 mm thick galvanized sheet. Self-
tapping screws shall be used for fixing bead or as an alternative bead
fixing may be done with concealed screws. Back putty or 'U' shaped
rubber channel shall be provided for glazing. No spring glazing clip
shall be required for bead glazing. '
( Pag« 17, clause 11.1 ) - Add the following new clause after 11.1:
'11.1.1 Sashes shall be inside glazed and prepared for putty glazing
unless otherwise specified. '

( DDC 11 )

Printed at : Prabhat Offset Press, New Delhi-2

 AMENDMENT NO.2 MARCH 1986
TO
IS 11361·1978 SPECIFICATION FOR
STEEL WINDOWS FOR INDUSTRIAL BUILDINGS

( Page 7, clause 6.3) - Substitute the following for the existing

clause:
'6.3 Pivots and spring catches shall be of non-ferrous metal. Coupling
members for forming composite windows shall be fabricated either from
mild steel sheets or mild steel flats conforming to IS : 226-1975 or shall be
of extruded aluminium alloy section ( see Fig. 2 )" The thickness of the
sheet/ Hat shall be :1" 15 rnm. '

( Page 7, foot-note unth 't' mark ) - Substitute C (.I,/til renision y ' jlu
, Cfollrth revision) '.

( Pt.ge 8, Fig. 2A) _. Subst itutc the following for the existing
figure:

1/\ STE.El_OlH"lING eAR

( Page 16, Fig. ~) ) - Substitute ~ :~·15 . /0· 3' at both tlu- places.

Printed at : Prabhat Offset Press, New Delhi-2

 IS I 1361 • 1978

Indian Standard
SPECIFICATION FOR STEEL WINDOWS
FOR INDUSTRIAL BUILDINGS

( First Revision)
o. FOREWORD
0.1 This Indian Standard (First Revision) was adopted by the Indian
Standards Institution on 20 February 1978, after the draft finalized by the
Doors, Windows and Shutters Sectional Committee had been approved
by the Civil Engineering Division Council.
0.2 Indian Standards Institution has already issued IS: 1038-1975* which
covers steel doors, windows and ventilators for use in domestic huildings,
such as residences, offices and schools. 'I'he range of sizes included in
IS: 1038-1975*, however, does not meet all the needs of industrial
buildings, like factories and warehouses, where larger single units are
generally required to be used. Although, it is possible to couple two or
more units in the domestic range to form larger units, yet the increased
weight and cost and the resulting type of openings make it necessary to
evolve a separate range to cover specifically the requirements of windows
for industrial buildings. This standard has been prepared with this object
in view and, as in the case of IS: 1038-1975·, the sizes of units have been
derived on the basis of a IO-em module and tolerances have been specified
in accordance with IS: 1233-1969t.
0.3 This standard was first published in 1959. In this revision reference to
rolled steel sections used for fabrication of doors, windows and ventilators
has been omitted and separately included in IS : 7452-1974+. \Vith regard
to the clearance on all the four sides for the purpose of fitting the doors
windows or ventilators into modular openings, in view of the difficulties
experienced with the adoption of specified clearance the provisions have
been modified to 10 rom alround. Accordingly, the manufacturing sizes
of these components have been suitably modified. Consequential changes
have also been incorporated in the sizes of glass panes.
• Specification for steel doors, windows and ventilators ( second revision ).
tRccomlucndations for modular co-ordination of drmensions in the builciin
industry (.liTst recision ).
:Spl'cification for hot r ol lod steel sections for doors, windows and vcnt ilaro rs.

3
IS t J361 • 1978

0.3.1 Another important modification incorporated in this revision

relates to the process of welding permitted for corner joints. In this
context, provisions have been made to permit any method of welding
provided the joints conform to certain requirements as given in this
standard.
0.4 In the formulation of this standard due wcightage has been given to
international coordination among t.he standards and practices prevailing
in different countries in addition to relating it to the practices in the field
in this country.
0.5 For the purpose of deciding whether a particular requirement of this
standard is complied with, the final value, observed or calculated express-
ing the result of a test or analysis, shall be rounded off in accordance with
IS : 2-1960*. The number of significant places retained in the rounded off
value should be the same as that of the specified value in this standard.

I. SCOPE
1.1 This standard deals with steel windows suitable for use in industrial
buildings and designed to suit openings based on a module of 10 em.

2. TERMINOLOGY
2.0 For the purpose of this standard, the following definitions shall apply.
2.1 Sash - A complete industrial window unit, whether of the fixed or
opening type.
2.2 Composite Window - A window comprising of two or more sashes
joined together with one or more coupling members.
2.3 Ventilator -- The opening part of a sash. It consists of an inner
frame and an outer frame.
2.4 Centre-Hung Ventilator - j\ ventilator horizontally pivoted at the
centre of each side, with the top half opening inwards and the bottom half
opening outwards.
2.5 Bottom-Hflog Ventilator - A ventilator hinged at the bottom, and
opening inwards.
2.6 Top-HuDI Ventilator - A ventilator hinged at the top, and opening
outwards.

-Rules for rounding off numerical va lucs ( revisrd).

4
 IS : 1361 • 1978

3. HANDING
3.1 Hand ing and direction of closing of sashes shall be designated in
accordance with IS : 40~1-3-1 ~)69*.

4. DESIGNATION
4.1 In designating the dillcreut si~c.j and types of industrial windows, the
following notation shall be adopted:
IN x Width of window >~ Type of X Height of window
expressed in nurn- window expressed in num-
ber of modules ber of modules
The letters IN, indicate an industrial window; and the type of window
is indicated by the foJlowing letter symbols:
F = Fixed sash,
C = Centre-hung sash,
B = Bottom-hung sash, and
T = Top-hung sash.
Examples:
1) IN 10 C: 15 indicates' Industrial window for opening- 10 module
wide ( 100 ern) by 1:) module hig-h ( 1SO ern) J with -centre-hung
ventilator.
2) IN 16 F 10 indicates' Industrial window for opening 16 module
wide ( 160 cm ) by 10 module high ( 100 em ) , with fixed g)as~
panes.
4.2 Composite Windows - For composite windows, the notations
illustrated below shall be adopted:
a) IN 10 C 10/IN 10 c iO/IN 10 (~10: J'his indicates three indus-
trial windows of type I ~ lO C 10, placed next to one another and
coupled.
IN 10 C IO/IN 10 C 10 '[1' " di 1 .. ..
b) IN 10 C'TITI~llbc-15 : lIS In icates t ie combination of four
windows, t\VO of the type IN 10 C 10 on top and two of the type
IN 10 C 15 at the bottom, all the four of them coupled both
horizontally and vert ica 11 y,

5. STANDARD SIZES AND TOLERANCES

5.1 Size'
5.1.1 The type and sizes of industrial sashes shall be as gi veri ill Fig. 1.

*Rt'commendations for symbolic dcsign:\tio.l of clircct ion of closing and Lln's 01

doors, windows and shutters.

5
IS I 1"1 • 1978

.L1 98 I 218
1
:[ffi]
t i N 10 C 10 IN 16 C 10 IN 22 C 10
IN 10 T 10 IN 16 T 10 IN 22 T 10
IN 10 B 10 IN 16 8 10 IN 22 B 10

~EE8
- r I N 10 F 10 IN 16 F 10 IN 22 F 10

T
...
II
tm
CD

L~
~

'N 10 C IS IN 16 C 15 IN 22 C IS
IN '0 T 15 IN 16 T 1S IN 22 T 15
IN 10 B 15 IN 16 B 15 IN 22 13 IS

IN 10 F IS IN 16 F 15 IN 22 F 15

II
I'
Ii

IN '0 C 20 IN 16 C 20 IN 22 C 20
IN 10 T 20 IN 16 T 20 IN 22 T 20
IN 10 B 20 IN 16 B 20 IN 22 B 10

IN '0 F 20 IN 16 F 20 IN 22 F 20
All di menaions in centimetres.
FlO. 1 INDUSTRIAL SASHES

6
 IS : 1361 - 1978

5.1.2 The dimensions shown in Fig. 1 arc overall height.s and widths to
the outside of frames of steel sashes, These sizes are derived after allowing
10 rom clearance on all the four sides for the purpose of fitting the sashes
into modular openings.
5.1.3 The ventilators shall be of one size and designed to fit into the
outer frame of IN 10 C 10 and with 1·2 rom clearance.
5.2 Toleraaces - The overall dimensions of industrial windows given in
Fig. 1 shall not vary by more than 3 rom.
6. MATERIAL
6.1 Rolled steel sections for the fabrication of industrial sashes shall
conform to IS : 7452-1974*. Steel used in the manufacture of these
sections shall conform to IS: 1977-1969t.
6.2 Cord-eyes, pulleys, brackets and catch plates for spring catches may be
of malleable iron or mild steel. -
6.3 Pivots and spring catches shan be of non-ferrous metal. Coupling
members for forming composite windows shall be fabricated either from
steel conforming to IS : 226-1969: or shall be of extruded aluminium alloy
section ( see Fig. 2 ).
6.4 Glass panes shall weigh at least 7·5 kg/m 2 and shall be free from flaws,
specks and bubbles. All glass panes shall have properly squared corners
and stra ight edges,
6.5 Screws
6.5.1 Screw threads of machine screws used in the manufacture or
industrial sashes shall conform to the requirements of IS : 4218 ( Parts I to
VI )-1967§.
6.5.2 Wood screws used in the fixing of sashes shall conform to
IS : 451-19721\.
6.6 All bolts, nuts, screws, washers, peg stays and other mild steel fittings
shall be suitably corrosion treated.
·Specification for hot rolled steel sections.for doors, windows and ventilator•.
tSpecification for structural steel ( ordinary quality) (first r,vision ).
:Specification for structural steel ( standard quality) C!nurlh r,rnsiDn ).
§Specification for ISO metric screw threads:
Part I Basic and design profiles
Part II Pitch diameter combinations
Part III Basic dimensions for design profiles
Part IV Tolerancing system
Part V Tolerances
Part VI Limits of sizes for commercial bolts and nuts (diameter range 1 to
39 mm ),
IISpeci6cation for technical supply condition for wood screws ( second r,vision ).

7
IS : 1361- 1978

3.2
2A STEEL COUPLING BAR 28 EXTRUDED ALUMINIUM AlLOV
COUPLING BAR·
INSIDE

SIZE _--~.
---...... I 25 SIZE

2C COUPLING OF TWO FIXED SASHES

INSIDE

SIZE SIZE

20 COUPLING OF A FIXED AND OPEN SASH

INSIDE

--
SIZE

2E COUPLING OF TWO OPEN SASHES

All dimensions in m il lirnctrcs.

FIG. 2 COUI»J.INO DETAIl.S - IIORIZON'I':\L AND VERTICAL

8
 IS : 1361. 1918

1. CONSTRUCTION
7.1 Sashes shall be square and flat.
7.2 Sashes shall be constructed of sections which have been cut to the
required length and mitred. The corners of fixed and opening frames
shall be welded to form a solid fused welded joint conforming to the
requirements given in 7.2.1. All frames shall be square and flat. The
precess of welding adopted may be flash butt welding or any other suitable
method which gives the desired requirement.
7.2.1 Requirements of J1'tided Joillts
7.2.1.1 Visual inspection test - When two opposite corners of the
frame are cut, paint removed and inspected, the joint shall conform to the
following:
a) Welds should have been made all along the place of meeting the
members;
b) Welds should have been properly ground; and
c) Complete cross section of the corner shall be checked up to see
that the joint is completely solid and there are no cavities visible.
7.2.1.2 Micro and macro examinations - From the two opposite corners
obtained for visual test as in 7.2.1.1, the flanges of the sections shall be
cut with the help of a saw. The cut surfaces of the remaining portions
shall be polished, etched and examined.
The polished and etched faces of the weld and the base metal shall
be free from cracks and reasonably free from under cutting, overlaps, gross
porosity and entrapped slag.
7•.2.1.3 Fillet weld test - The fillet weld in the remaining portion of
the joint obtained in 7.2.1.2, shall be fractured by hammering. The
fractured surfaces shall be free from slag inclusions, porosity, crack,
penetration defects and fusion defects.
7.3 Tee sections for glazing shall be tenoned and riveted into the frames
and where they intersect, the vertical tie shall be broached and the
horizontal tee threaded through it, and the intersection closed by hydraulic
pressure.
7.4 Ventilators, consisting of an inner opening frame and an outer fixed
frame, shall be made as separate units which shall be bedded in mastic
and screwed into the sash frames or tees with steel screws. The bars
forming the vertical members of the inner and outer frames of centre-
hung ventilators shall be reversed at the point of pivot; the top bars of
inner and outer frames of top-hung ventilators, and the bottom bars of
inner and outer frames of bottom-hung ventilators shall also be reversed
(see Fig. 3 ).

9
IS ; 1361 - 1978

HORIZONTAllY CENTRE..,HUNG
BELOW CENl RE OR TOP HUN7
HORIZONTALLY
CENTRE-HUNG
ABOVE CENTRE
OR BOTTOM-HUNG
OR lOP-HUNG

. HORIZONTALlV CENTRE"'HUNG
\ASOVE CENTRE OR BOTTOM-HUNG

INSIDE

I I HORIZONTAllY
.~'. . . '. CENTRE-HUNG
~ BElOW CENTRE OR
.J• •~;;~~;;~
_ _ _ _ _ _ _...J
. .l.....:_!!!!!!!!!!!!!l:=~
",
-==== = BOTTOM-HUNG ~

-- - ..... - - - - _ .
: SIZES
- " ... - - - . - . - - - - - - _ ..... __ A ..... _ _ • • __ •• • • ~_ - _

HORIZONTALLY CENTRE "HUNG

BEl.OW CENTRE OR TOP-HUNG -

HOR I ZONTALL Y
CENTRE-HUNG
BELOW CENTRE
TOP-HUNG OR
BOTTOM -HUNG "

_ _ _ _ _ _ _ _ _S_IZ_E_S
_ _- ~

FH;. 3 SECTIONAL DETAILS TUROUGH SASIU-,S

JO
 IS : 1361 • 1978

8. HOLES FOR FIXING, COUPLING AND GLAZING

8.1 Holes for fixing and coupling sashes shall be provided In the web of
the outside frame sections (and of outer ventilator frame sections where
these occur at the perimeter of the sash). These holes shall be of n 'TIm
diameter, countersunk, and shall be located 1·4 ern from the outside face
of the frame section in positions shown in Fig. 1.

8.2 Holes for glazing clips shall also he provided, one hole being located
in the web of the section or tee, on each side of each pane.

9. FITTINGS AND FIXING MATERIALS

9.1 Centre-hung ventilators shall be mounted on a pair of brass cup pivots,

each pivot consisting of an inner and all outer cup, permitting the
swinging of the ventilator through an angle of at least 85°, and so
balanced that the ventilator shall be capable of remaining open in any
desired position under normal conditions.

9.2 Centre-hung ventilators shall be provided with a pulley ( consisting of

a brass. pulley-wheel in a mild steel or malleable iron brarkct ) in 'the
centre of the bottom section of the ventilator, and attached with brass or
steel screws ( see Fig. 5 ). They shall also he provided with a mild steel
or malleable iron cord-eve riveted or we ldcd to the bottom inner frame
section of the ventilator iin a position corrvspond ;ng to that of t he pulley
( jet Fig. 5 ).

9.3 Centre-hung and bottom-hung ventilators shall have a bronze

( gunmetal ) spring catch in the centre of the top section of the ventilator,
r
suitable for operation by ha nd or pole and by cord, in the case of centre-
hung ventilators ( see Fig. 5 )]. r-rhis spriug' catch which shall he screwed to
the frame with brass screws, shall close into a rnild steel or malleable iron
catch plate riveted or welded to the outside of the outer ventilator Irarne
section.

9.4 Bottom-hung and top-hung ventilators shall be hung on strong hinges

made of steel or malleable iron or of non..ferrous metal.

9.5 Bottom..hung ventilators shall be provided with a pair of standardized

steel or malleable iron folding side arrns to limit the opening of the
ventilator ( see Fig. 6 ). When the ventilator is closed, these side arms
shall be invisible.

11
IS I 1361 - 1918

~_dd
98 58
d d d
4

-r--
I

I I I I

- f e e e f ~

- c a b :;} c -
a .:J c-
-C

- f
-- b
e e e f ~
r I I I

e e e
--i--l. ..
d d d
d d d
e .t;
All dimensions in centimetres.
:FIO.4 FIXING HOLE CENTRES AND TYPES or GLA:s:s PA~\ES
12
 IS : 1361 .1918

SASH VENTS
DRILL AND
TAP M6

19

CORD NOT APFtLICABLE TO

BOTTOM HUNG VENTILATORS

19

(B)

DRilL AND
TAP MS

(A) Preparation for spring catch on horizontally pivoted and bottom hung ventilators
(8) Preparation for pulley and cord-eye on horizontally pivoted ventilators

f\:OTE -- Mastic should be applied to joints where hatching shown.

All dimensions in millimetres.

.FIO. 5 SPRING CATCH, PULLEY AND CORD-EvE

9.6 Top-hung ventilators shall be provided with a 30 em peg stay of steel

or of non-ferrous metal, mounted on a jaw bracket of mild steel or malle-
able iron, welded or riveted to the bottom inner ventilator section and
locking into a locking bracket of similar material welded or riveted to the

13
IS: 1361 • 1978

bottom inner or outer ventilator section, and with a sherardized steel or

non-ferrous metal peg welded or riveted to the bottom outer ventilator
section ( .tee :Fig. 7 ).

,I
-

FIG. 6 FOLDING SIDE ARMS FOR BOTTOM-HUNG VENTILATORS

9.6.1 Alternatively, top-hung ventilators may be provided with a 30 em

bronze cam oocner screwed to the ventilator with brass screws
(ste Fig. 8 ). ·

14
 IS : 13S1 - 1978

'-"'---73 - - -.......- -...... 80 mm

10 WEB

8mm ¢ PIN
18
-,
I

---75----.4

....
----------300-----------~
All d imcnsions in mil limctres.
FIG. 7 A TYPICAL PEG STAY FOR SIDE-I-IUNG SHUTTERS AND
Top HUNG VF.NfILATORS

FlO. C CAM OPENER

15
IS I 1361 • 1978

9.6.2 Both peg stay and cam opener shall be capable of holding the
ventilator open in three different positions.
9.7 All sashes shall be provided with fixing fittings for the fixing holes
shown in Fig. 4. These may "be slotted reversible steel lugs ( hoJdfasts )
( see Fig. 9 ) complete with countersunk steel nuts and bolts for fixing to
brickwork; wood screws for fixing to wood, plugged concrete or stone; or
steel screws, or mild steel fixing clips with steel nuts and bolts (see Fig. 10)
for fixing to steel.

-.-£3
( ) ~
8

5 12.5 1_ (3

Z
2:
o
o
.-

~----70
-~
All dimeris ions in millimetres.

FIG. 9 SLOTTED F'IXING LUG I'OR BRICKWORK

16
 IS I 1361 • 1978

25--,
t

-~8mm¢
0

I
I
HOLE

1I
All dimensions in millimetres.
FIG. 10 FIXING CLIP FOR STEEL WORK

9.8 For coupling sashes with members specified to form composite

windows, countersunk steel bolts and cone-nuts, of suitable length and in
the quantities specified for fixing, shall be provided.
NO'JOE-- Where ventilation occur, lug screws and coupling screws may be of
round head type.
9.9 Two spring glazing clips per pane shall be provided. These shall be
made of spring steel to the design shown in Fig. 11.
10. COMPOSITE WINDOWS
10.1 Composite windows shall be despatched unassembJed, but complete
with necessary coupling components. In composite windows each coupling
member will increase the overall height or width by 20 mm maximum
which includes manufacturing tolerances.
11. GLASS
11.1 The sizes of glass panes for windows shall be as given In Table 1.
The sizes specified in the table include clearance. The number and sizes
of glass panes for each type of window shall be as shown in Fig. 4.
12. FINISH
12.1 AJI sashes and coupling members shall be either galvanized or
painted. All steel surfaces shall be thoroughly cleaned free of rust, scale,

17
IS 11361·1918

or dirt by pickling or phosphating and immediately painted with two coats

of red oxide conforming to IS: 102-1962* before despatch, or alternatively
galvanized by the hct dip, zinc spray or electrogalvanizing process.

1025

11 6

L21~

ENLARGED VIEW OF
GLAZING CLIP
All dimensions in millimetres.
FIG. 11 SPRING STEEl. GLAZING CLIP

·Specification for ready mixed paint, brushing. red lead) nonsett ing, priming
( reoised).

18
 15 I 1361 • 1978

TABLE 1 GLASS PANE SIZES

( ClGWI 11.1 )
PA.'Irf~ WIDTH HEIGHT
DE'lO~ATJON
(I) (2) (3)
mm mID
a 269 425
b 304 425
c 292 460
d 304- 460
e 304 4S2
r 292 492

1~.2 Material finished by hot-dip galvanizing shall be despatched

unpainted. Zinc sprayed and electrogalvanized material shall be given one
coat of red oxide paint,
12.3 The thickness of zinc coating by hot-dip galvanizing or metal spray
shan be uniform and not less than 0·5 kg/m 2 •
13. MARKING
13.1 All industrial sashes shall carry an identification of the manufacturer
or trade-mark, if any.
13.1.1 The product Ina~ also hl' marked witl: Standard Mark.

13.1.2 . 'I he lIS~ of the Standard Murk is governcd b) the provisions of the
Bureau of Indian Standards Act. I l.>X6 and the Rules and Regulations made
thereunder. '1" he details of condii ion-, under which the licence for the use of
Standard Mark. (lla~ he granted to manufactures or producers may be obtained
from the Bureau of Indian Standards.

14. PACKING
14.1 Industrial windows shall be despatched with the opening puu
suitably secured to preserve alignment when fixing and glazing.
14.2 Fixing lugs. coupling fittings and all hardware shall be despatched
separately.
14.3 Composite windows Iball be despatched uncoupled.

19
 BUREAU OF INDIAN STANDARDS
Headquarters:
Manak Bhavan,9 BahadurShahZafar Marg, NEW DELHI 110002
Telephones:23230131,23233375,23239402 Fax:91+011 23239399,23239382
E • Mall: into@bis.org.in website: http://www.bis.org.in

Central Laboratory: Telephone

Plot No. 20/9, Site IV,SahibabadIndustrialArea. SAHIBABAD201010 2770032

RegionslOfflces:
Central : ManakBhavan, 9 BahadurShahZatar Marg,NEW DELHI 11 0002 23237617
*Eastern : 1/14CITSchemeVII M, V.I.P. Road,Kankurgachi, KOLKATA700054 23378662
Northern : SCO 335-336, Sector 34-A, CHANDIGARH 160022 2609285
Southern: C.I.T. Campus, IV Cross Road,CHENNAI600113 22541984
tWestern: Manakalaya, E9, MIDC,BehindMarolTelephone Exchange, 28329295
Andheri(East), MUMBAI400093

Branch Offices:
'Pushpak',Nurmohamed Shaikh Marg, Khanpur, AHMEDABAD380001 5601348
PeenyaIndustrialArea, 1st Stage,Bangalore-Tumkur Road, BANGALORE 8394955
Commercial-cum-Office Complex, Opp. DusheraMaidan,Arera Colony, 2423452
BittanMarket,BHOPAL462016
62-63, GangaNagar, Unit VI, BHUBANESHWAR 751001 2403139
5th Floor, KovaiTowers, 44 Bala SundaramRoad,COIMBATORE 641018 221 0141
SCQ 21, Sector 12, Faridabad121007 2292175
SavitriComplex. 116G.T. Road, GHAZIABAD201001 2861498
53/5 Ward No. 29. R.G. Barua Road. 5th By-lane,Apurba Sinha Path, 2456508
GUWAHATI781003
5-8-56C,L.N. Gupta Marg, NampallyStationRoad, HYDERABAD500001 23201084
PrithaviRaj Road, Opposite BharatOverseasBank, C-Scheme,JAIPUR 302001 2223282
11/418B, SarvodayaNagar,KANPUR208005 2233012
Sethi Bhawan,2nd Floor, Behind LeelaCinema, NavalKishoreRoad, 261 8923
LUCKNOW 226001
H. No. 15, Sector·3,PARWANOO,Distt. Solan (H.P.) 173220 235436
Plot NoA-20·21, InstitutionalArea, Sector 62, Goutam Budh Nagar,NOIDA201307 2402206
PatliputraIndustrialEstate,PATNA 800013 2262808
Plot Nos. 657-660,MarketYard, Gultkdi. PUNE 411037 24274804
"SahajanandHouse"3rd Floor,BhaktinagarCircle,80 Feet Road, 2378251
RAJKOT360002
T.C.No. 21275 (1 & 2), Near Food Corporation of India, Kesavadasapuram-Ulloor Road.
Kesavadasapuram, THIRUVANANTHAPURAM 695004 2557914
1- Floor,UdyogBhavan,VUDA, SiripuramJunction,VISHAKHAPATNAM-03 271 2833

·Sales Office is at 5 ChowringheeApproach, P.O. PrincepStreet, KOLKATA 700072 23553243

tSales Office (WRO) Plot No. E-9, MIDC, Rd No.8, BehindTelephone Exchange,
Andheri (East), Mumbai-4000093 28329295

Prmted at Prabhat OffsetPress, New Delhi-2