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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 204-1 (1991): Tower Bolts - Specification: Part-1 Ferrous Metals [CED 15: Builder Hardware] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 204( Part 1 ) : 1991 (Reaffirmed2010) 1 ) ( Indian Standard TOWER BOLTS - SPECIFICATION PART 1 FERROUS METALS ( Fifth Revision) FirstReprintDECEMBER1993 . UDC 6833 © BIS 1991 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAH ADUR SHAH ZAFAR MARG NEW DELHI 110002 July1991 Price Group 4 Builder's Hardware Sectional Committee, CED "15 FOREWORD This Indian Standard (Part 1) (Fifth Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Builder's Hardware Sectional Committee had been approved by the Civil EngineeringDivision Council. This standard for tower bolts was first issued in 1950 and subsequently revised in 1961, 1966 and 1974. In the formulation of this standard due weightage has been given to international co-ordination amoDBthe standards and practices prevailing in different countries in addition to relating it to the practices in the field in this country. In this revision cold rolled low carbon steel sheets in accordance with IS 513 : 1986 and copper oxidized and zinc plated finish have been included. The standard also makes reference to the latest Indian standard for various types ofmaterials specified in this standard. This standard contains clauses 5.1.1, 6.5 and 7.1 which permit the purchaser to" use his option for selection to suit his requirements. - For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result ofa test or analysis, shall be rounded off in accordance with IS 2 : 1960'Rulesfor rounding oft" numerical values (revised)'. The number of signi ficant places retained in therounded off value should be the same as that ofthe specified value i" ibis standard. AMENDMENT NO. 2 AUGUST 2010 TO IS 204 (PART 1) : 1991 TOWER BOLTS — SPECIFICATION PART 1 FERROUS METALS ( Fifth Revision ) (Page 3, Table 1) — Insert the following note below the figure and substitute ‘16 mm, Min’ for ‘16 mm’ in the figure: ‘NOTE — The shape of the knob is illustrative only and may be round, half round, spherical or conical (see 5.1.1).’ (Page 7, Table 4) — Insert the following note below the figure and substitute ‘16 mm, Min’ for ‘16 ± 1mm’ in the figure: ‘NOTE — The shape of the knob is illustrative only and may be round, half round, spherical or conical (see 5.1.1).’ (CED 15) Reprograp hy Unit, BIS, New Delhi, India AMENDMENT NO.1 JANUARY 2008 TO IS 204 (PART 1): 1991 TOWERDOLTS SPECIFICATION PART 1FERROUS METALS ( Fifth RevisIon) (Page 2, clause 7.1, line 4) - Substitute 'IS 1378 : 1987'for ~IS 1376 : 1987'. (CEO 15) ReprographyUnit,815,NewDelhi, India IS 104( Part 1) : 1991 Indian Standard TOWER BOLTS - SPECIFICATION PART t FERROl'" METALS ( Fifth Revision) 1 SCOPE 4 MATERIAL This standard( Part I ) lays down the require 4.1 The materials used for tower bolts shall ments for tower bolts madeofferrous metals. comply with the requirements given in Table S. 1 REFERENCES 5 MANUFACTURE The Indian Standards listed in Annex A are S.1 General necessary adjuncts to this standard. Towerbolts shall be well made and shall be free from defects. The bolts shall be finished to the 3 TYPES correct shape and shall have a smooth action. 3.1 Tower bolts shall be ofthe following types All tower bolts made with sheets 1-2mm thick (lee Tables 1to 4) : ness and above shall have countersunk screw holes to suit countersunk head wood screws Type Description Table ( see IS 6760 : 1912). All sharp edges and a) BarrelTower BO/I$ corners shall be removed and finished smooth. lA Mild steel barrel tower bolts with 5.1.1 Barrel and skeleton tower bolts, wherever mildsteel barrel and mild steel bolt possible, shall have knob integral with the 18 Mild steel barrel tower bolts with bolts, In case it is not possible to provide a mild steel barrel and cast iron boIt single piece construction ofbolt, the knob may preferably be fitted to the bolt with a pin or b) Semi-Barrel TlIM'erBolts alternatively, screwed and riveted to the bolt 2A Mild steel semi-barrel tower bolts. 2 and its shape may be round, halffound, spheri full cover with mild stee1 sheet calor conical, ofrobust construction as speci pressed barrel and mild steel bolt fied by the purchaser. 28 Mild steel semi-barrel tower bolts. 2 5.1 Particolars full cover with mild steel sheet pressed barrel and cast iron holt 5.2.1 BarrelTo~'erBollS 3A Mild steel semi-barrel tower bolts. 2 Barrel made from sheet shall be properly open cover with mild steel sheet pressed to shape. Cast barrel shall be free from pressed barrel and mild steel bolt casting and other surface defects. Mild steel. 3D Mild steel semi-barrel tower bolts, 2 bolt shall be made from mild steel round bar. open cover with mild steel sheet Cast iron bolts shall be cast to correct shape pressed barrel and cast iron bolt and shall be free from castingand other surface defects (a typical illustration is shown in. c) Rivetedor Spot WeldedTower Bolts Table 1). 4A Mild steel tower bolts riveted type 3 5.2.2 Semi-BarrelTOMter Bolts with back plate and mild steel bolt and openstaple Mild steel bolts shall be made fcom mild steel 48 Mild steel tower bolts rtveted type 3 round bars and finished to shape and polished with back plate and cast iron bolt bright beforeassembly, The cast iron bolts shall and open staple be cast to correct shape and shall be free from casting and other surface defects. Bolt shall be NOTE- If specifically ordered, this type oftower polished bright before assembly (typical illus bolt Play allo be suppli~d withalternative stapleof rivetedor welded type with back piare. trations are shown in Table 2 ). d) Skel,ton TowerBolts 5.2.3 Rivetedor Spot WeldedTowe, Bolts 5 Mild steel skeleton tower bolts 4 Mild steel bolts shall be made from mild steel with steel sheet pressed plate and round bars and finished to shape and polished Itaplesand mild steel bolt. bright before assembly. The cast iron bolts shall IS 20..( Part 1) : 1"1 be cast to correct shape and polished bright 9.2 Semi-barrel tower bolts shall be wrapped in before assembly. The plates and straps after strongpaperinbundles, eachcontaining10bolts assembly shall be-firmly riveted or spot welded up to 150 rom size, and 5 bolts above 1SOmm, ( a typical illustration is shown in Table 3 ). Each packet shall bear a label showing the indi.. cation ofthe source of manufacture or trade 5.2.4 Skeleton TowerBolts mark, type, size and quantity oftower bolts. The staples and plate in case of mile steel skeleton tower bolts shall be made from mild 9.3 Skeleton tower bolts shall be wrapped in steeI sheet (a typical illustration is shown in strong paper in bundles, eachcontaining6 bolts. Table 4). Each packetor cartonshall bear a label showing the indication of the source of manufacture or 6 DIMENSIONS trade-marktype, size andquantityoftowerbolts. 6.1 The leading dimensions ofbarrel tower bolts or 10 SCALE SAMPLINGAND CRITEJUA and tolerances on them shall conform to those FORCONFORMITY given in Table 1. 10.1 Lot 6.2 Theleading dimensions ofsemi-barrel tower bolts and tolerances on them shall conform to In any consignment, all the tower bolts ofthe those given in Table 2. same type and size and manufactured at the same trme, shall be pouped together to consti 6.3 The leading dimensions of riveted or spct tute a lot. welded tower bolts and tolerenceson them shall conform to those given in Table 3. 10.1 S..,leSize '.4 The leading dimensions of skeleton tower The number oftower bolts,to be selectedfrom bolts and tolerances on them shall conform to a lot shall depend upon the size ofthe lot and those given in Table 4. shall be in accordance with col 1 and 2of 6.5 The tower bolts may be supplied in sizes Table 6. and dimensions and shapes other than those specified in relevant tables ofdimensions where 10.2.1 These tower bolts shaU be selected at so agreed between the manufacturer and the randomfrom at least 10percent of the packets purchaser. subject to a minimum ofthree. equal Dumberof tower bolts beiDa selected from each such 1 nNISH packet. 7.1 Unless otherwiseordered for, the bolts shall 10.3 TIItI be bright finished or bright, stain finished, Ni Cr-plated as per Or I of IS 1068: 19~5, copper All the tower bolts selected as in 10.2 shall be oxidized as per IS 1376 : 1987 or zinc plated as checked for dimensional requirements (lee') per IS 1513 : 1986. and for finish ( lee 7)~ Any tower bolt which fails to satisfy the requirementl of dimensions 7.1.1 Other parts of the tower bolts shall be or finish or both shall be considered as a defee finished as given in 7.1 or may also be stove tive bolt. enamelled black. 10.4 Crtterl.lor Coalo...lty 8 MARKING A lot shall be considered as conformina to the 8.1 Each tower bolt shall be clearly marked requirements ofthis standard if. the number of with the indicationofthe source ofmanufacture defective bolts aJJlona those inspected does not or trade mark. exceed the correspondiDI number pVeD in col 3 ofTable 6; otherwiseit shall be considered as 8.1.1 The tower bolt may also be marked with not conformina to the requirements of this the Standard Mark. standard. 9 PACKING 10.5 For conformity to the requirements of the 9.1 Barrel tower bolts shall be suitably packed material the manufacturer shall provide a certi or in cartons. Each carton shall bear a label sho- ficate of compliance to the requirements wing the indicationofthe sourceofmanufacture correspondio. Indian Standard (••, col 3 in or trade-mark, type, size and quantity ofbolts. Table 5). 2 IS ~ ( Part 1) : 1991 TUie 1 Barre. Tower Bolt. eClDu.Jel 3.1, 5.2.1 and6.1 ) All dimensionsin millimetres. o G SECTION XX SOCKET A B -====----------:.:-_--- - - =---~ ----- __________ __ ~-IJ E+5mm Size L.~t'of teDat" .1 Wldtllof aarrel,C Di.of LeDltllof nlcbe.1 DI.of MI.llllaln Dot, A 88"el.B Bolt, D ~ket, E 01Mil. Bore .f No. of When £.--W--h"e"n"'" SteelSheet .nelor Eca.·lly D -10·0 D- 12'0 forRa.,..I, Soetet,lG Spaced F Sere. Holesla Barrel .Del 8ocket. forWood Icr.. No.6 (I) (2) (3) (4) (" (6) (7) (8) (9) (10) 1 75 75 1 6 I 95 100 100 120 6 I 125 12S 145 6 I J 1.50 150 170 I g t I I 175 175 195 , 32 38 10·0 25 1"25 0·' to ."S > 8 , or more than I 200 200 220 J2'O dia or 8 I I 225 22' 24' 8 I I 2SO 250 270 10 I 1 300 300 320 J J 10 Toler- +3 + 3 +3 +3 ± 0" :1:1 ± O"IS anee -J - I -I - I 3