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.

इंटरनेट मानक

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“Invent a New India Using Knowledge”

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“Step Out From the Old to the New”

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“The Right to Information, The Right to Live”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 8886-1 (1978): Ships' Ordinary Rectangular Windows, PartI: Types and Dimensions [TED 17: Shipbuilding]

IS 8886 (Part 1) : 2012

© BIS 2012

December 2012 Price Group 7

B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

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(igyk iqujh{k.k )

Indian StandardSHIPS’ ORDINARY RECTANGULAR WINDOWS —

SPECIFICATIONPART 1 CLASSIFICATION, DIMENSIONS, MATERIALS, MARKING AND DESIGNATION

( First Revision )

ICS 47.020.10

Shipbuilding Sectional Committee, TED 17

FOREWORD

This Indian Standard (Part 1) (First Revision) was adopted by the Bureau of Indian Standards, after the draftfinalized by the Shipbuilding Sectional Committee had been approved by the Transport Engineering DivisionCouncil.

This standard was first published in 22 parts. Parts 1 and 2 in 1978, Part 3 in 1979 and remaining in 1980. Thisrevised standard shall also cover Part 2 and Parts 4 to 22. Hence Part 2 and Parts 4 to 22 of this standard shallstand withdrawn whereas Part 3 of this standard shall be retained.

In this revised standard separate detailed dimensions for heavy and light rectangular windows have not beenspecified instead dimensions, materials, etc, for critical items only have been specified in a standardizeformat.

The standard generally incorporates the requirements under the Merchant Shipping Act, 1958, and the rulesmade thereunder; and in addition, general requirements and positioning of ships’ rectangular windows issubject to the approval by the Government of India under the said Act and the Rules.

In the fromulation of this standard, considerable assistance has been derived from ISO 3903 : 1993 ‘Shipbuildingand marine structures — Ships’ ordinary rectangular windows’ issued by the International Organization forStandardization.

This standard is also based on the experience of ships’ window and glass manufacturers, shipbuilders andauthorities who apply to ships the regulations of the International Convention for the Safety of Life at Sea,1974 (SOLAS 1974), with Amendments, 1981 and of the International Convention on Load Lines, 1966.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance withIS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained inthe rounded off value should be the same as that of the specified value in this standard.

IS 8886 (Part 1) : 2012

1

Indian StandardSHIPS’ ORDINARY RECTANGULAR WINDOWS —

SPECIFICATIONPART 1 CLASSIFICATION, DIMENSIONS, MATERIALS, MARKING AND DESIGNATION

( First Revision )

1 SCOPE

This standard specifies the classification of ordinaryrectangular windows for ships (series, types andmodels) and gives the dimensions forinterchangeability and construction, materials, tests,marking and designation of these windows.

The requirements of fire resistant rectangularwindows and heated rectangular windows are notcovered in the standard.

2 REFERENCES

The following standards contain provisions whichthrough reference in this text, constitute provisionsof this standard. At the time of publication, theeditions indicated were valid. All standards aresubject to revision and parties to agreements basedon this standard are encouraged to investigate thepossibility of applying the most recent editions ofthe standards indicated below.

IS No. Title1365 : 2005/ Slotted countersunk flat headISO 2009 : 1994 screws (common head style) —

Product grade A (fourth revision)1366 : 2002/ Slotted cheese head screws —ISO 1207 : 1992 Product grade A (third revision)4218 (Part 2) : ISO General purpose metric screw

2001/ threads: Part 2 General planISO 261 : 1998 (second revision)6101 : 2005/ Slotted pan head screws —ISO 1580 : 1994 Product grade A (second revision)6180 : 1989 Toughened safety glasses for

ships’ round windows (f irstrevision)

7483 : 2005/ Pan head screws with Type H or ZISO 7045 : 1994 cross recess — Product grade A

(second revision)7485 (Part 2) : Countersunk flat head screws

2005/ (common head style) with Type H orISO 7046-2 : 1990 Type Z cross recess — Product

Grade A: Part 2 Steel of propertyclass 8.8 stainless steel and non-ferrous metals (second revision)

7486 : 2005/ Countersunk raised head screwsISO 7047 : 1994 (common head style) with Type H

or Type Z cross recess — Productgrade A (second revision)

8809 : 1991 Shipbuilding — Gaskets for ship’sside windows (first revision)

8886 (Part 3) : Specification for ships ordinary1979 rectangular windows: Part 3

Positioning8911 : 2005/ Countersunk slotted raised headISO 2010 : 1994 screws (common head style) —

Product grade A11914 : 1986 Glossary of terms for ships’

windows

3 DEFINITIONS

For the purpose of this standard the definitionsgiven in IS 11914 shall apply.

4 CLASSIFICATION

Rectangular windows shall be classified by series,types, models and nominal sizes in accordancewith 4.1 to 4.4 respectively.

Further classification characteristics are the materialclasses (see 6.1).

NOTE — A survey of standardized rectangular windowsthat is given in 4.5.

4.1 Series

4.1.1 Regular Series (N)

Rectangular windows of the regular series shallcontain a toughened safety glass pane that meetsthe requirements of IS 6180.

4.2 Types

Ships’ ordinary rectangular windows may be of thetwo types:

a) Type E — Heavy-type rectangular window; andb) Type F — Light-type rectangular window.

IS No. Title

IS 8886 (Part 1) : 2012

2

4.3 ModelsModels shall be designated according to thefollowing principal characteristics:

a) Opening or non-opening model;b) Opening direction of glassholder; andc) Type of fastening.

The various combinations of these, which are inaccordance with the definitions given in IS 11914,are laid down in Table 1.

4.4 Nominal Sizes

The nominal size is defined by the clear lightdimension for width w1 and height h1 of therectangular window, in millimetres, and is identifiedby a code number (see Table 2).

4.5 Survey of Types, Models and Sizes

A survey is given in Table 3 for all rectangularwindows standardized in this standard. It applies towindow series N (regular).

The illustrations given in Table 3 do not define the

construction; they are simplified examples forinformation only.

5 TECHNICAL REQUIREMENT

5.1 General

Rectangular windows of all series, types, models andnominal sizes shall be manufactured to therequirements (dimensions, materials, etc) given inthis standard. They shall be capable of meeting thetest requirements specified in 7.

5.2 Dimensions

5.2.1 Main Dimensions

The main dimensions of rectangular windows shallbe as given in Fig. 1 and Tables 4 and 5. Thecorrelation between nominal sizes and types andmodels shall be as given in Table 3.

NOTE — Figure 1 does not define the construction ofany series, type, model or size or rectangular window; it isgiven for the indication of standardized dimensions only.The illustration shows an inwards opening side-hingedrectangular window.

Table 1 Principal Characteristics of Models(Clause 4.3)

Opening orNon-opening

Opening

Opening Direction FasteningBolted (B) Welded (W)

ModelDesignation

Code

Outwards(O)

Side-hinged

Left-hand(L)

Right-hand(R)

Left-hand(L)

Right-hand(R)

Top-hinged(T)

B

—

B

—

B

—

B

—

B

—

B

—

B

——

—

W

—

W

—

W

—

W

—

W

—

W

—

W

ILB

ILW

IRB

IRW

ITB

I T W

OLB

OLW

ORB

ORW

OTB

OTW

NOB

NOW

(1) (2) (4)(3) (5)

Side-hinged

Inwards(I)

Non-opening(NO)

Top-hinged(T)

IS 8886 (Part 1) : 2012

3

Table 2 Nominal Sizes(Clause 4.4)

Code No.

(1)

1

2

3

4

5

6

Nominal Size

w1 × h1

mm × mm(2)

300 × 425

355 × 500

400 × 560

450 × 630

500 × 710

560 × 800

Illustration

(3)

7

8

9

900 × 630

1 000 × 710

1 100 × 800

IS 8886 (Part 1) : 2012

4

Table 3 Survey of Rectangular Windows(Clauses 4.5 and 5.2.1)

Type

E

F

E

F

Model (see 4.3)

Nominal Sizesby Code No.

(see 4.4)

Illustration(Shown are Bolted Windows)

(2) (3) (4) (5)

ILB —

— ILW

IRB —

— IRW

ILB —

— ILW

IRB —

— IRW

ITB —

— ITW

ITB —

— ITW

1 to 6

4 to 8

4 to 9

Inwards opening top-hinged windows

(1) Bolted Welded

(see 4.2)

Inwards opening side-hinged windows

IS 8886 (Part 1) : 2012

5

Table 3 (Continued)

Type

E

F

E

F

OLB —

— OLW

ORB —

— ORW

OLB —

— OLW

ORB —

— ORW

OTB —

— OTW

OTB —

— OTW

1 to 6

4 to 8

4 to 9

Outwards opening top-hinged windows

Model (see 4.3)

Nominal Sizesby Code No.

(see 4.4)

Illustration(Shown are Bolted Windows)

(2) (3) (4) (5)(1) Bolted Welded

(see 4.2)

Outwards opening side-hinged windows

IS 8886 (Part 1) : 2012

6

Table 3 (Concluded)

NOB —

— NOW

1 to 8

5.2.2 Corner Radii

The basic radius is the corner radius r1 of the clearlight size (see Table 4).

The values of the other radii shall be as follows:

a) Spigot outside corner radius and welding-inmain frame utside corner radius:

r2 = r1 + 24 mm; and

b) Flange outside corner radius : r3 = r1 +65 mm maximum.

MinimumNumber ofFasteners2)

(10)

444466

688

r1 1)

(9)

505050

100100100

100100100

g

Max

(8)

414141414141

414141

h3

Max

(7)

555630690760840930

760840930

w3

Max

(6)

430485530580630690

1 030 1 130 1 230

h2

+ 2

(5)

473548608678758848

678758848

w2

+ 2

(4)

348 403 448 498 548 608

948 1 048 1 148

w1 × h1

(3)

300 × 425355 × 500400 × 560450 × 630500 × 710560 × 800

900 × 6301 000 × 7101 100 × 800

Code No.

(2)

123456

789

Sl No.

(1)

i)

ii)

Nominal Size

1) For corner radii r2 and r3, see 5.2.2.2)The number of fasteners includes only closing devices and hinges with round holes, see 5.6.

Table 4 Main Dimensions and Number of Fasteners(Clauses 5.2.1, 5.2.2 and 5.6.1)

All dimensions in millimetres.

Model (see 4.3)

Nominal Sizesby Code No.

(see 4.4)

Illustration(Shown are Bolted Windows)

(2) (3) (4) (5)(1) Bolted Welded

(see 4.2)

Non-opening windows

Type

E

F 1 to 9

IS 8886 (Part 1) : 2012

7

FIG

. 1 M

AIN

DIM

ENSI

ON

S OF R

ECTA

NG

ULA

R W

IND

OW

1B W

elde

d m

odel

1A B

olte

d m

odel

IS 8886 (Part 1) : 2012

8

5.2.3 Height of Spigot

The recommended nominal heights of the main framespigot, which should be preferred for all types,models and nominal sizes of rectangular windows,are given in Table 6.

5.2.4 Glass Recess

The dimensions of the glass recess (w4, h4, r4 and c)in the glassholder of opening rectangular windowsand in the frame of non-opening rectangular windowsshall be as given in Fig. 2 and Table 7.

5.2.5 Frame Thickness

The thickness of main frames for M.S. welded fixed

type rectangular window to be 12 mm and openablewindow to be 8 mm.

The thickness of aluminium frame for windows ‘T’ asshown in Fig. 1 should not be less than 8 mm.

5.3 Glass Retaining Frame

The use of a glass retaining frame for fixing the glasspane in the glass holder or in the main frame isoptional.

5.3.1 Dimensions

If a glass retaining frame is used, the minimumdimensions shall be as given in Fig. 3.

Sl No.

(1)

i)

ii)

RectangularWindow

(2)

Series

N(Regular)

1)

Glass Thickness, t1

(3)

Code No. of Window

Table 5 Glass Thickness(Clauses 5.2.1 and 5.4.1)

All dimensions in millimetres.

Type

E

F

1 2 3 4 5 6 7 8 9

10 10 12 12 15 15 19 19 -

8 8 8 8 10 10 12 12 15

1) In special cases, a greater glass thickness shall be used for obscured glass panes; see 5.5.3 and Table 10.

Table 6 Height of Spigot (Dimension C)(Clause 5.2.3)

ActualHeight

mm

(4)

The actualrequireddeliveryheight ofthe spigot

may beagreed whenordering therectangular

window.

Manufac-turingHeight

mm

(3)

16

30

Model

(2)

S lNo.

(1)

i)

ii)

Bolted

Welded

IS 8886 (Part 1) : 2012

9

FIG. 2 GLASS RECESS

Table 7 Glass Recess(Clause 5.2.4)

All dimensions in millimetres.

S lNo.

(1)

i)

ii)

CodeNo.

(2)

1

2

3

4

5

6

7

8

9

w1 × h1

(3)

300 × 425

355 × 500

400 × 560

450 × 630

500 × 710

560 × 800

900 × 630

1 000 × 710

1 100 × 800

w4

Min

(4)

321

376

421

471

521

581

921

1 021

1 121

h4

Min

(5)

446

521

581

651

731

821

651

731

821

r4

(6)

60

60

60

110

110

110

110

110

110

c

(7)

This dimension isleft to the

manufacturer’sdiscretion. It

depends on thethickness of the

glass pane and onthe glazing

material used

Nominal Size

5.3.2 Screws for Glass Retaining Frames

To fasten the glass retaining frame, slotted or crossrecessed screws in accordance with IS 1365, IS 1366,IS 6101, IS 7483, IS 7485 (Part 2), IS 7486 or IS 8911should be used, at the window manufacturer’sdiscretion. Such screws shall have the followingcharacteristics:

a) Thread : M6b) Length : 16 mmc) Material : Marine corrosion-resistant

copper alloy (for windows ofcoper alloy); stainless steel (forwindows of aluminium alloy orsteel)

5.3.3 Glazing Screw Pitch

The screw pitch shall be as follows:

a) For Type E windows : 75 mm, Maxb) For Type F windows : 100 mm, Max

5.4 Glass Panes

5.4.1 Panes for Regular Rectangular Windows(Series N)

Clear of obscured toughened safety glass panes inaccordance with IS 6180 shall be used : appropriatecodes are given in Table 8.

Correlation of glass thickness with types and nominalsizes shall be as given in Table 5, with the peculiarityfor obscured glass panes given in 5.5.3.

IS 8886 (Part 1) : 2012

10

FIG. 3 GLASS RETAINING FRAME

Table 8 Finish of Glass Pane(Clause 5.4.1)

S lNo.(1)

i)ii)

Kind of Finish

(2)

ClearObscured

Code

(3)

Y1Y2

5.5 Glazing

5.5.1 Glazing Material

An appropriate glazing material, resistant to seawater and ultra-violet light, shall be used.

5.5.2 Mounting of Glass Pane

When glazing, it is essential that the glass pane is

centralized in the glassholder or in the main frame sothat there is the same clearance all round.

5.5.3 Peculiarity for Obscured Glass Panes

5.5.3.1 Mounting position A

In general, obscured glass panes are positioned withthe obscured surface facing outwards. For thispositioning, the glass thicknesses given in Table 5shall apply. It shall be noted, however, that the glasspane becomes transparent when wet.

5.5.3.2 Mounting position B

When, in special cases, an obscured toughenedsafety glass pane is positioned with the obscuredsurface facing inwards, a greater glass thickness thanthat specified in Table 5 shall be used. These greaterthicknesses shall be as given in Table 9.

3A For use with cylindrical head screws

3B For use with countersunk head screws

IS 8886 (Part 1) : 2012

11

5.6 Fasteners (Closing Devices and Hinges)

5.6.1 Number of Fasteners

a) The minimum number of fasteners comprisingclosing devices and hinges with round holesfor glassholders of Type E and F openingrectangular windows shall be as given in Table 4.

b) The total number of the fasteners and theirconstruction shall be such that the windowmeets the strength and watertightnessrequirements given in 7.

NOTE — If the hole for the hinge of the glassholder isoval, the hinge is not regarded as a fastener.

5.6.2 Closing Device

a) At least two closing devices (for examplescrew in bolts or swingbolts with nuts) shallbe provided.

b) In the case of outwards-opening windows, anappropriate screw-locking device shall beprovided to ensure that, when open, theclosing device does not strike the glass pane.

c) If a closing device is composed of a swingbolt,swingbollt nut and swingbolt hinge pin, thesecomponent parts shall have main dimensionsas given in Table 10.

5.6.3 Hinges

The number of hinges (at least two) depends on thekind of window (type, model, size and construction).For all kinds of opening rectangular windows, it isrecommended to use hinge pins with a diameter inaccordance with Table 10.

Table 9 Thickness of Obscured Glass Panes WhenObscured Surface is Facing Inwards

(Clause 5.5.3.2)All dimensions in millimetres.

S lNo.

(1)

i)

ii)

Glass Thickness for Typeof Rectangular Window

E F (4) (5)

Nominal Size

Code No. w1 × h1 (2) (3)

15151919−−

−−−

121212121515

1919−

300 × 425355 × 500400 × 560450 × 630500 × 710560 × 800

900 × 6301 000 × 7101 100 × 800

123456

789

Table 10 Diameter of Bolts and Pins(Clauses 5.6.2 and 5.6.3)

All dimensions in millimetres.

Thread ofSwingbolt and Nut

in AccordanceIS 4218 (Part 2)

Diameter of Hinge Pin for

Swing bolt Glassholder

5.7 Gaskets for Glassholder and Glass RetainingFrame

To ensure water tightness between the glassholderand main frame, gaskets shall be used.

5.7.1 Type of Gasket

The gaskets shall be in accordance with IS 8809, atthe manufacturer’s discretion.

5.7.2 Fixing of Gaskets

The gaskets shall be secured in the grooves of theglassholder by means of a suitable adhesive.

5.8 Fixing Device

All sidewards opening rectangular windows shall beprovided with a fitted fixing device (for example ahook). This fixing device is part of the window to bedelivered.

6 MATERIALS

6.1 Main Frame, Glassholder and Glass RetainingFrame

The main components of a rectangular window (mainframe, glassholder and glass retaining frame) shallbe manufactured from the materials given in Table 11.These materials shall be marine corrosion-resistantand shall have the minimum mechanical propertiesgiven in Table 13.

The values for the minimum tensile strength andminimum elongation given in Table 13 are valid forthe types of windows indicated. However, thematerial used should comply with any relevantInternational standard.

The material class code numbers given in Table 12,which are for indicating the materials in thedesignation of the rectangular windows, arecombinations of the material code numbers, given inTable 11. For the main frame, the glassholder and theglass retaining frame, in that order.

M 20 12 12

IS 8886 (Part 1) : 2012

12

Table 11 Material Code Numbers(Clause 6.1)

S l Material MaterialNo. Code Number

(1) (2) (3)

i) 1 Copper alloy material(for example brass, gunmetal)

ii) 2 Ferrous material (forexample mild steel, caststeel, ductile iron)

iii) 3 Aluminium material(cast or wrought alloy)

iv) 0 No components (forexample glassholders fornon-opening windows)

Table 12 Material Classes(Clause 6.1)

S lNo.

(1)

i)

ii)

Model ofRectangular

Window

(2)

Opening

Non-opening

Method ofFasteningWindow

(3)

Bolted

Welded

Bolted

Welded

MaterialClass Code

Number

(4)

111

333

211

221

222

233

333

101

303

201

202

203

303

Material

Main Frame Glassholder Glass Retaining Frame

(5) (6) (7)

Brass1)

Aluminium alloy 1)

Mild steel Brass1)

Mild steel Brass1)

Mild steel

Mild steel Aluminium alloy1)

Aluminium alloy(only wrought or Aluminium alloy1) extruded)

Brass1) — Brass1)

Aluminium alloy1) — Aluminium alloy1)

Mild steel — Brass1)

Mild steel — Mild steel

Mild steel — Aluminium alloy1)

Aluminium alloy(only wrought or — Aluminium alloy1) extruded)

1) The use of cast or wrought alloy is optional.

Table 13 Tensiles Strength and Elongation for Main Components(Clauses 6.1 and 7.2.2)

Minimum ElongationPercent

(4)

10

3

Minimum Tensile StrengthN/mm2

(3)

180

140

Type of Window

(2)

E

F

Sl No.

(1)

i)

ii)

IS 8886 (Part 1) : 2012

13

6.2 Closing Device and Hinge Pin

Bolts, pins and nuts of the closing device and hingepins for the glassholder shall be manufactured frommaterials having the following properties:

a) Resistant to corrosion;b) No effect on the corrosion resistance of other

parts; andc) Minimum mechanical properties as given in

Table 14.

The values for the minimum tensile strength andminimum elongation given in Table 14 are valid forthe types of windows indicated. However, thematerial used should comply with any relevantnational standard.

For aluminium alloy windows, the bolts (screw-in-bolt or swingbolt) of the closing device and the hingepin of the glassholder shall be made of non-corrodible steel, stainless steel or such alloys as arenot likely to cause corrosion of windows or pins.

7 TESTING

7.1 Watertightness Test

Maximum allowable pressures for rectangularwindows with standardized dimensions and withdeviating dimensions are given in Annex A andAnnex B respectively.

7.1.1 Board Test

To ensure that the rectangular window and packingare watertight when fitted, a hose test shall be carriedout by the shipbuilder to the satisfaction of theowner’s or surveyor’s representative.

The test shall consist of hosing the rectangularwindow by means of at least 12.5 mm nominal sizehose held not more than 1.5 m from the window andwith a water pressure of at least 250 kPa.

7.1.2 Shop Test

An equivalent hydraulic test shall be carried out bythe manufacturer before despatch by means of batch

tests (approximately 10 percent of the delivery batch,with a minimum of one window), at a test pressure of25 kPa.

7.2 Mechanical Strength Test

7.2.1 A prototype window shall be subjected to amechanical strength test by a suitable test method,applying a load equivalent to the followingpressures:

a) Type E windows : 75 kPab) Type F windows : 35 kPa

7.2.2 The manufacturers shall, at the request of thepurchaser, provide guarantees that the metallicmaterials used in the construction of the windowconform with the strength requirements as laid downin Tables 13 and 14.

7.2.3 Mechanical testing of the materials shall becarried out in accordance with the mechanical testrequirements of relevant Indian Standards.

8 MARKING

Windows conforming to this standard shall be markedas indicated in 8.1.

8.1 Regular Rectangular Windows (Series N)

8.1.1 Marking of Body

a) The main frame or some other metallic maincomponent part shall be marked with the letterfor the Type (Type E or Type F).

b) Further marking indications are optional, forexample:

1) Nominal size;2) Material class;3) Manufacturer’s name or trade-mark; and4) Number of this Indian Standard.

8.1.2 Marking of Glass Pane

The glass pane shall be marked in accordance withIS 6180 .

Type ofWindow

(1)

E

F

Hinge Pin Screw-in Bolt, or Swingboltand Swingbolt Pin

Minimum TensileStrength

N / mm2

(2)

350

250

MinimumElongation

Percent

(3)

15

14

Minimum TensileStrength

N / mm2

(4)

250

180

MinimumElongation

Percent

(5)

14

8

Nut

Table 14 Tensile Strength and Elongation for Closing Devices(Clauses 6.2 and 7.2.2)

8.1.3 BIS Certification Marking

The product may also be marked with the StandardMark.

8.1.3.1 The use of the Standard Mark is governedby the provisions of the Bureau of Indian StandardsAct, 1986 and the Rules and Regulations madethereunder. The details of conditions under whichthe licence for the use of the Standard Mark may begranted to manufacturers or producers may beobtained from the Bureau of Indian Standards.

9 DESIGNATION

For ordering and reference purposes, rectangularwindows conforming to this standard shall bedesignated in accordance with 9.1 and 9.2.

9.1 Elements for Designation

The following basic elements shall be used, in theorder given:

a) Denomination (abbreviated): window (Series N);b) Number of this Indian Standard [IS 8886

(Part 1)];c) Series (code letter), as specified in 4.1;d) Type (code letter), as specified in 4.2;e) Nominal size, as specified in Table 2;f) Height of spigot, as specified in 5.2.3;g) Model (code), as specified in Table 1;

h) Material class of window (code number), asspecified in Table 12; and

j) Finish of glass pane (code), as specified in5.4.1.

9.2 Example for Regular Rectangular Windows (N)

A rectangular window in accordance with this IndianStandard of regular series (N), heavy Type E, ofnominal size 450 mm × 630 mm (Window No. 4), withheight of spigot c = 16 mm, side-hinged inwards left-hand opening bolted model (ILB), material class 111,with glass pane of plate glass and glass finish clear(Y1) is designated as follows:

Window IS : 8886-N-E4 × 16-ILB-111-Y1

10 POSITIONING

Rectangular windows shall be positioned inaccordance with IS 8886 (Part 3).

11 INSTALLATION

For installation, the relevant national rules andregulations apply, if any.

The dimensions of the precut hole in the shell plateshould be as given in Table 15.

For windows which are designed for welding-in, theprecut hole should be smaller than that indicated inTable 15, in order to keep the gap between the cutand the main frame as small as possible.

Table 15 Precut Hole(Clause 11)

All dimensions in millimetres.

S lNo.

(1)

i)

ii)

No.

(2)

1

2

3

4

5

6

7

8

9

w1 × h1

(3)

300 × 425

355 × 500

400 × 560

450 × 630

500 × 710

560 × 800

900 × 630

1 000 × 710

1 100 × 800

Nominal Size

(4)

352

407

452

502

552

612

952

1 052

1 152

(5)

477

552

612

682

762

852

682

762

852

(6)

76

76

76

126

126

126

126

126

126

0

+25h0

+25w 0

+15r Illustration

(7)

IS 8886 (Part 1) : 2012

14

IS 8886 (Part 1) : 2012

15

ANNEX A(Clause 7.1)

MAXIMUM ALLOWABLE PRESSURE FOR RECTANGULAR WINDOWS WITHSTANDARDIZED DIMENSIONS

A-1 The maximum allowable pressure p to whichrectangular windows in accordance with this IndianStandard of regular series N (galzed with toughened

safety glass panes according to IS 6180), may besubjected to as is given Table 16.

Sl No.

(1)

i)

ii)

Type

(2)

EHeavy

FLight

No.

(3)

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

9

Nominal Sizemm × mm

(4)

300 × 425

355 × 500

400 × 560

450 × 630

500 × 710

560 × 800

900 × 630

1 000 × 710

300 × 425

355 × 500

400 × 560

450 × 630

500 × 710

560 × 800

900 × 630

1 000 × 710

1 100 × 800

Glass Thicknessmm

(5)

10

10

12

12

15

15

19

19

8

8

8

8

10

10

12

12

15

MaximumAllowablePressure

kPa

(6)

99

71

80

63

80

64

81

64

63

45

36

28

36

28

32

25

31

Rectangular Window

NOTE — The glass thickness applies to glass panes of regular windows (series N). In special cases, a greater glass thickness shallbe used for obscured glass panes (see 5.5.3).

Table 16 Maximum Allowable Pressure

B-1 Where one or both dimensions (width w1 orheight hI) of a window are different from those givenin Table 2, the maximum allowable pressure, p, in kPa,shall be determined using the following equation:

ANNEX B(Clause 7.1)

MAXIMUM ALLOWABLE PRESSURE FOR RECTANGULAR WINDOWS WITH DEVIATING DIMENSIONS

2

2

40 000 tpbβ

=

wheret = nominal thickness of the glass pane, in mm;β = factor obtained from the graph in Fig. 4;

andb = minor dimension of the window, in mm.

IS 8886 (Part 1) : 2012

16

FIG

. 4 C

URV

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R DET

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OF F

AC

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ON

WIN

DO

W S

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ATIO

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Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmoniousdevelopment of the activities of standardization, marking and quality certification of goods and attending toconnected matters in the country.

Copyright

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Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed from Doc No. : TED 17 (724).

Amendments Issued Since Publication______________________________________________________________________________________

Amendment No. Date of Issue Text Affected______________________________________________________________________________________

______________________________________________________________________________________

______________________________________________________________________________________

______________________________________________________________________________________

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Published by BIS, New Delhi

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