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tS204( Part2) :1992

YTrt 2 WFiig w( Tkft p3m )

Indian StandardTOWER BOLTS-SPECIFICATION

PART 2 NON-FERROUS METALS( Fifth Revision )

First Reprint OCTOBER 1994

UDC 621*882*2 [ 669*2/-S] : 624.97

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MAR6

NEW DEL HI 110002

February 1992 Price Gfoop3

( Reaffirmed 1996 )

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Builders Hardware Sectional Committee, CED 15

FOREWORDThis Indian Standard (Fifth Revision ) was adopted by the Bureau of Indian Standards, after thedraft finalized by the Builders Hardware Sectional Committee had been approved by the CivilEngineering Division Council.The specification for tower bolts was issued in 1950 and subsequently revised in 1961, 1966,1974 and 1978. The standard was bifurcated into two parts in the fourth revision ( 1978 );Part 1 deals with ferrous metal tower bolts and Part 2 deals with non-ferrous metal tower bolts.For the tower bolts made of non-ferrous metals, the length of bolt has been kept equal to thelength of the barrel and the size is denoted by the length of the barrel.Also the diameter of the bore of the barrel and socket for the barrel tower bolts has beenspecified to suit the extrusions locally available.This revision of the standard makes reference to the latest Indian Standards for various typesof materials specified herein. Consequently, it also indicates the designations for variousmaterials as per the latest versions of these standards.This standard contains clauses 5.1.1, 6.3 and 7.1 which permit the purchaser to use his optionfor selection to suit his requirements.In the formulation of this standard due weightage has been given to international co-ordinationamong the standards and practices prevailing in different countries in addition to relating it tothe practices in the field in this country.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 berounded off in accordance with IS 2 : 1960 Rules for rounding off numerical values ( revised ) .The number of significant places retained in the rounded off value should be the same asthat of the specified value in this standard.

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IS 204 ( Part 2 .) : 1992

Indian StandardTOWER BOLTS -SPECIFICATION

PART 2 NON-FERROUS METALS

( Fifth Revision )1 SCOPE1.1 The standard ( Part 2) lays down require-ments for tower bolts made of non-ferrousmetals.2 REFERENCES2.1 The Indian Standards listed in Annex Aare necessary adjuncts to this standard.3 TYFES3.1 Tower bolts shall be of the following types( see Tables 1 and 2 ):TYPO Description Table

a) Barrel Tower Bolt s1

2

3

4

8

9

Brass barrel tower bolts with castbrass barrel and rolled or cast brassboltsBrass barrel tower bolts with barrelof extruded sections of brass androlled or down brassBrass barrel tower bolts with brasssheet barrel and rolled or drawnbrass boltAluminium barrel tower bolts withbarrel and bolt of extruded sectionsof aluminium alloysZinc barrel tower bolts with barreland bolt of die-cast zinc alloy

b) Skeleton Tower Bolt sBrass skeleton tower bolts with castbrass plate and staples and rolled ordrawn brass boltBrass skeleton tower bolts withstaples and plate of extrudedsections of brass and rolled ordrawn brass boltAluminium skeleton tower bolts withpla,e, staples and bolt of extrudedsections of aluminium alloyZinc skeleton tower bolts with.platestaples and bolts of die-cast zincalloy

1

11

1

1

2

2

2

2

1

t MATERIAL4.1 The material used for tower bolts shallcomply with the requirements given in Table 3.S MANUFACTURE5.1 GeneralTower bolts shall be well made and shall befree from defects. The bolts shall be finishedto the correct shape and shall have a smoothaction. All tower bolts made with sheetsl-2 mm thickness and above shall havecountersunk .screw holes to suit countersunkhead wood screw (see IS 6760 : 1972 ). Allsharp edges and corners shall be removed andfinished smooth.5.1.1 Tower bolts, wherever possible, shall haveknob integral with the bolt. In case it is notpossible to provide a single piece constructionof bolt, the knob may preferably be fitted tothe bolt with a pin or alternatively, screwedand riveted to the bolt and its shape may beround,robust half round, spherical or conical, ofconstructionpurchaser. as specified by the5.2 Particulars5.2.1 Barrel Tower Bolt sBarrel made from sheet shall be properlypressed to shape. Cast barrel shall be free fromcasting and other surface defects. Brass boltShall be made from rolled or drawn brass rod.-Extruded sections of aluminium alloy and brassshall be free from defects. Non-ferrous metaltower bolts shall each be provided with asmall spring and a ball on the inside of barrelto enable smooth working ( oneillustration is shown in Table 1 ). typical5.2.2 Skeleton Tower Bolt sThe staples and plate of non-ferrous metalshall be free from casting or other defects( one typical illustration is shown in Table 2 ).6 DIMENFIONS6.1 The leading dimensions of barrel towerbolts and tolerances on them-shall conform tothose given in Table 1. ,WQ

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IS 201 ( Part 2 ) : 1992Table 11 Barrel Tower Bolts, Types 1 to 5

( Ciauses 3.1, 5.2.1 a nd 6.1 )All dimensions in millimetres.

--__ ,$, OR B _.-___

Size

(1)75

101,)12525017.5200225250300

-4 E+Smm i---Y-SPRING AND SALL

^..

f-d-- F-h-CAST OR

EXTRUDED

Length of Width of, Ma of Thickness of Metal of Barre!, F Dia ofBolt or Barrel, C Bolt D T--~---_~ Bore ofBarrel - .L._ Brass Alumkium Alioy Sheet Barrel(A or B) When When r-_-.-h-.-,T BrassDEIOO &=120 Z:;c DclOXl LL12.0 SoocrketAlloy G

(2)15

100125150175200225250300

(3) (4) (5) !6)

32 38 104 25or

12.0

(7) (8)I.5 11.5 I;24 12.0 f2.0 1 1.602. 0 j2. 0 i

2.02.0 I1J

19) ClQ (11)

240 1 to 1.23 0.7 to l-5more thandia of bolt

MinimumNo. ofEquallySpacedHoles inBarrel &S&cok;e;ScrewNo. 6i 12)

6668888

10IO

__~_ _--- - ._- ^__--Toler- 9.3 4-0.5ante --1 fl 4: : +0,3 &I -0.2 -9.25 gJ.25 ho.15 - -

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w

Table 2 Skeleton Tower Bolts, Types 6 to 9( Clauses 3.1, 5.2.2 and 6.2 )Ail dimensions in millimetres.

Size LengthB%A

(1) (2)375 375450 450600 600750 750900 900

Toler-ance *l

BOLT PLATE SCREW HOLES \ ./STAPLES PRESSED

CAST OREXTRUDED

Dia of Bore ~of Dia ofength Width of Bolt Dia Length of Thickness of Plate or Socket FB::, Plate or StapleC B::, ,~~~~~----Staple E * , Plate or Staple Shank ofBrass Aluminium Alloy G KnobPl;te ,=A--- D When When r--T or Zinc Alloy w~------h---~When D=lO.O 0=12-O When When c- --A-, When When When When

D=lO.O Da12.0 D=lO.O D=12.0 When When D=lO*O D=12-5 D=lO.O D=12.0DE10.0 D-12.0

No. MinimumNo. ofscrewHolesforwood%z .(13)10

\ (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17)34

i 100 32.0 38.0 10.02.0r 22.0 25.0 1.20 1.60 1.60 240 11.0 13.0 5.0 6.0 4

+_od25 +_;25 j-O.25 ,:25 +0*59.5 *0.5 ito.5 &I-5 *0.5 *0.5 kO.5 &O*s -0;5

12121418

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IS204(Part2):19926.2 The leading dimensions of skeleton towerbolts and tolerances on them shall conform tothose given in Table 2.6.3 The tower bolts may be supplied iri sizesand dimensions and shapes other than thosespecified in relevant tables of dimensions andwhere so agreed between the manufacturerand the purchaser.7 FINISH7.1 Unless otherwise specified the bolts shallhave finish as given below:

a) Barrel Tower Bolts1) Brass tobver bolt s ( TvD es 1 t o 3 > - Boltand barrel polishkd*& plated as ipecifiedby the purchaser.2)

3)

h)1)2)

3)

Al umi nium all oy t ow er bolt s ( Type 4 ) -Bolts and barrel anodized. The anodicfilm may be either transparent or dyedas specified by the purchaser. The qualityof anodized finish shall not be less thanGrade AC 10 of IS 1868 : 1982.Zi nc all oy t ow er bol ts ( Type 5 ) .- Boltand barrel oxidized, bronzed or platedas specified by the purchaser.Skeleton Tower BoltsBrass skel et on tow er bol t s (Types 6 and 7)--Bolt, plate and staples bright finished.Ai uminium all oy skeleton tow er bolt s( Type 8 ) - Bolt, plate and staplesanodized. The anodic film may be eithertransparent or dyed as specified by thepurchaser. The quality of anodisedfinish shall not be less than Grade AC10 of IS 1868 : 1982.

Zinc al l oy skel et on t oker bol t s ( Type 9 )-Bolt, plate and staples oxidized, bronzedor plated as specified by the purchaser.

8 PACKING8.1 Barrel tower bolts shall be suitably packedin cartons. Each carton shall bear a labelshowing the name of the manufacturer ortrade-mark, type size and quantity of bolts.Aluminium tower bolts shall be individuallywrapped with tissue paper or polythene film.8.2 Skeleton tower bolts of non-ferrous metalshall be suitably packed and the aluminiumalloy bolts shall be individually wrapped withtissue paper or polythene film. Each packet orcarton shall bear a label shdwing the name ofthe manufacturer or trade-mark, type, size andquantity of tower bolts.9 SCALE OF SAMPLING AND CRITERIAFOR CONFORMITY9.1 LotIn any consignment, all the tower bolts, of thesame type and manufactured at the same time,shall be grouped together to constitute a lot.9.2 Sample SizeThe number of tower bolts, to be selectedfrom a lot, shall depend upon the size of thelot and shall be in accordance with co1 1 and2 of Table 4.9.2.1 These tower bolts shall be selected atrandom from at least 10 percent of the packetssubject to a minimum of three, equal numberof tower bolts being selected from each suchpacket.,9.3 TestsAll the tower bolts selected as in 9.2 shall bechecked for dimensional requirements ( see 6 )and for finish (see 7 ). Any tower bolt whichfails to satisfy the requirements of dimensionsor finish or both shall be considered as adefective bolt.

Table 3 Requirements for Materials for Tower Bolts( Clauses 4.1 and 9.5 )

$1 No. Material(1 (2)

i) Aluminium alloy tubesii) Aluminium alloy extruded rodsiii) Brass sheltsiv) Cast brassv) Extruded brassvi) Zinc base alloy die casting

Suitable Grade in Indian Standards(3)

Designation 63400 WP or 63400 P of IS 1285 : 1975Designation 65032 WP of IS 733 : 1983Alloy designation CuZn 40 Condition HB of IS 410 : 1977Grade CB-2 of IS 292 : 1983Type II, Half hard condition of IS 319 : 1974Alloy Zn A14, Die casting of IS 742 : 1981

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IS204(Part2):19929.4 Criteria for ConformityA lot shall be considered as conforming to therequirements of this standard if the number ofdefective bolts among those inspected does notexceed the corresponding number given in co13 of Table 4; otherwise it shall be considered asnot conforming to the requirements of thisstandard.9.5 For conformity to the requirements of thematerials- the manufacturer shall provide acertificate of compliance to the requirementsof corresponding Indian Standard ( see co1 4 inTable 3 ).10 MARKING10.1 Each tower bolt shall be clearly markedwith the name of manufacturer or trade-mark.10.1.1 The tower bolt may also be marked withthe Standard Mark.

Table 4 Scale of Sampling and Criterionfor Conformity( Clauses 9.2 and 9.4 )

Lot Size SampleSize PermissibleNumberof DefectiveTower Bolts(1) (2) (3)

up to 200 15 0201 o 300 20 1301 to 500 30 2501 o 800 40 2801 and above 55 3

ANNEX A( Clause 2.1 )

LIST OF REFERRED STANDARDSI S No.

292 : 1983319 ; 1974410 : 1981733 : 1983

Title IS No.Leaded brass ingots and 742 : 1981castings ( second revision )Free-cutting brass, bars, rods 1285 : 1975and sections ( thir d revision )Cold rolled brass sheet, ,stripand foil ( thir d revision )Wrought aluminium and 1868 : 1982ahuninium alloy bars, rods,and sections ( for generalengineering purposes ) ( third 6760 : 1972revision )

TitleZinc base alloy die castings( second r evision )Wrought aluminium andaluminium alloy, extrudedround tube and hollow sections( for general engineeringpurposes ) ( second r evision )Anodic coatings on aluminiumand its alloy ( second revision )Slotted countersunk head woodscrews

http://../link/31to60/319.Bishttp://../link/31to60/319.Bishttp://../link/31to60/319.Bishttp://../link/31to60/410.Bishttp://../link/31to60/410.Bishttp://../link/31to60/410.Bishttp://../link/61to88/733.Bishttp://../link/61to88/733.Bishttp://../link/61to88/733.Bishttp://../link/61to88/742.Bishttp://../link/61to88/742.Bishttp://../link/61to88/742.Bishttp://../link/12/1285.Bishttp://../link/12/1285.Bishttp://../link/12/1285.Bishttp://../link/15to30/1868.Bishttp://../link/15to30/1868.Bishttp://../link/15to30/1868.Bishttp://../link/61to88/6760.Bishttp://../link/61to88/6760.Bishttp://../link/61to88/6760.Bishttp://../link/15to30/1868.Bishttp://../link/12/1285.Bishttp://../link/61to88/742.Bishttp://../link/61to88/733.Bishttp://../link/31to60/410.Bishttp://../link/31to60/319.Bis

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Bureau of Indian StandardsBIS is a statutory institution established under the Bureau o/ Indian Standards Act, 1986 topromote harmonious development of the activities of standardization, marking and qualitycertification of goods and attending to- conaeFted matters in the country.CopyrightBIS has a copyright of all its publications. No part of these publications may be reproduced inany form without the prior permission in writing of BIS. This does not preclude the free use, inthe course of implementing the standard, of necessary details, such as symbols and sizes, type orgrade designations. Enquiries relating to copyright be addressed to the Director ( Publications ), BIS.Review of Indian StandardsAmendments are issued to standards as the need arises on the basis of comments. Standards.arealso reviewed periodically; a standard along with amendments is reaffirmed when such a reviewindicates that no changes are needed; if the review indicates that changes are needed, it is takenup for revision. Users of Indian Standards should ascertain that they are in possession of thelatest amendments or edition by referring to the latest issue of BIS Handbook and StandardsMonthly Addition.This Indian Standard has been developed from Dot : No. CED 15 ( 5013 )

Ameodmeats Issued Since PoblicationAmend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDSHeadquarters:Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones : 3310131,33113 75 Telegrams : Manaksanstha( Common to all Oflices )

Telephones

t331.01 31331 13 75

Regional Offices:Central : Manak Bhavan, 9 Bahadur Shah Zafar MargEastern : l/l4 C.I.T. Scheme VII M, V.I.P. Road, ManiktolaCALCUTTA 700054Northern : SC0 445-446, Sector 35-C, CHANDIGARH 160036

NEW DELHI 110002

Southern : C.I.T. Campus, IV Cross Road, MADRAS 600113Western : Manakalaya, E9 MIDC, Marol, Andheri ( East )BOMBAY 430093

i37 84 99, 37 85 6137 86 26, 37 86 62

t53 38 43, 53 16 4053 23 84

t235 02 16, 235 04 42235 15 19, 235 23 15632 92 95, 632 78 58632 78 91, 632 78 92

Branches : AHMADABAD. BANGALORE. BHOPAL. BHUBANESRWAR. CGIMBATORE.FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR.LUCKNOW. PATNA. THIRUVANANTHAPURAM.Reprography Unit, BIS, New Delhi, India

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SV1N -2&O2WS

O COLN

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AMENDMENT NO. 2 OCTOBER 1997TOIS 204 ( PART 2) : 1992 TOWER BOLTS -SPECIFICATIONPART 2 NON-FERROUS METALS

( Fif th Revision(P~ge2,TabZe1,Fig.)-Substh1te16~1mmfor16mm.(Page 2, Table 1 ) - Insert a new figure as given below before last figure:

(CED15)Reprography Unit, BIS, New Delhi, I ndia