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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 8450 (2009): Shipbuilding and marine structures - rungs for dog-step ladders [TED 17: Shipbuilding] “!ा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 8450 :2009 ISO9519:1990 " 'J.{Fdl<.J lfl'"fCh Jfu ~ ~'{il'iIQ \iI<'14t=r R'iIUI sPT-~ CffiTft ~ #i -gg ( ~ .1J'"Ifr~ ) Indian Standard SHIPBUILDING AND MARINE STRUCTURES - RUNGS FOR DOG-STEP LADDERS ( First Revision) ICS 47.020.50 @ BIS 2009 BUREAU OF INDIAN STANDARDS MANAK SHAVAN. 9 BAHADUR SHAH ZAFAR MARG NEWDELHI 110002 April 2009 PriceGroup2 Shipbuilding SectionalCommittee.TED 17 NATIONAL FOREWORD This Indian Standard (First Hevision) which IS identical with ISO 9519 : 1990 'Shipbuilding and marine structures- Rungs fordog-stepladders' IssuedbytheInternationalOrqaruzatronforStandardization(ISO) was adopted Dythe Bureau of Indian Standards on the recommendation of the Shipbuilding Sectional Committeeandapprovalof theTransportEngineeringDivisionCouncil. This standard was first published in 1977.The present revision was taken up to harmonize itwith current international practices. In the revised standard, rungs for dog-step ladders for ship's masts have been Included. The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are. however, notidenticaltothoseused inIndian Standards. Attention is particularlydrawn tothe following: a) Whereverthewords'InternationalStandard'appear referring tothis standard,they shouldbe readas 'Indian Standard', b) Comma (.)hasbeenusedasadecimalmarkerintheInternationalStandardwhileinIndianStandards, thecurrentpracticeistouse apoint(.)as thedecimal marker. Intrusadopted standard reference appearstocertain International Standards forwhich Indian Standards alsoexist. Thecorresponding Indian Standards.which aretobesubstitutedintheir places,arelistedbelow along Withtheirdegreeofequivalencefortheeditionsindicated: tnternetionetStandard Correspondmg IndianStandard Degreeof Equivalence ISO630 : 1980' Structural steels IS2062 :2006 Hot rolled low.medium Technically Equivalent andhigh tensile structural steel (sixth rev/sIan) ISO2768·' :1989General tolerances IS 2102 (part 1) 1993 General Identical - Part 1:Tolerances for linear and tolerances:Part 1Tolerancesforlinear angulardimensionsWithoutIndividual and angular dimensions without tolerance mdrcatrons mdividuat tolerance indications (third revision; Thetechnicalcommitteehas reviewed theprovisionsofthefollowing InternationalStandard referredinthis adopted standard and has decided that ItISacceptable for use inconjunctionwiththis standard: InternationalStandard Title ISO t035·2:~980 Hot-rottedsteelbars - Part 2:Dimensions ofsquarebars For the purpose of deciding whether a particular requirement of this standard is complied With.the final value.observedorcalculated expressingtheresultofatestoranalysis,shall beroundedoffinaccordance .tnIS2:1960'Rulesforroundingoffnumericalvalues(revised)',Thenumberofsignificantplaces retained Intherounded off value shouldbe the same asthat ofthe specified value inthis standard. IS 1450: 2008 ISO 8518:1180 Indian Standard SHIPBUILDING AND MARINE STRUCTURES - RUNGS FOR DOG-STEP LADDERS ( First Revision) 1 SCope ISO 2768-1 1989,General tolerances .- Pllrt , Tolt'r· anees for linear and angular aimensrons wIthout /11 dividuat toternnce indications This International Standard specifies the types, di mensions, material,manufacture and designation of rungs for dog-step ladders:it also lays down the in 3 Types stallation and composition ofsingle rungs forming a dog-step ladder. Rungs for dog-step ladders are divided into th~ fol· lowing two types' Dog-step ladders, formed from single rungs. may qnly be used where fixed vertical ladders with Type A ror ship's structure: strIngers" cannot be installed. Dog-step ladders fit ted to the ship's structure should serve only to Type B lor ship's masts. bridge minordifferences in height. Dog-step ladders as specified in this International 4 Material Standard may also be fi"ed to marine structures otherthan ships to serve equivalent purposes. 4.1 Seml-nnlshed product NOTE t UNre of this International Standard should The rungs shall be formed from steel sqtl:lre b:m; notethat they should ensure compliance with such stalu, meeting the specification of ISO 1035-2 tory requirement., rule. and regulalions as may be ap pllc:able to the individual ship or marine structure concerned. 4.2 StHI quality The bars shall be made or steel meeting the speer ncatlon or ISO630. grade Fe 360. as the minimum Quality 2 Normatlv...f...nee. NOTE 2 Allernatively. ship quality .t-' may b«! uM'd The following standards contain provisions which. provided that it has eqUivalent mechanical and wftlding through reference In thIs text, constitute provisions properties of thIs International Standard. At the time of publi cation, the editions indIcated were valid. All stan 5 Manufacture dards are subject to revision, and parties to agreements based on this International Standard 5.1 O.'ects are encouraged to Investigate the possibility of ap plying the most recent editions ofthe standards in Rungs shall be free from detects likely to cause in· dicated below. Members of lEe and ISO maintain jury to persons using the dog-step ladder registers ofcurrently valid International Standards. ISO 830:1980, Structuralsteels. 5.2 Surface nnlsh ISO 1035-2:1980, Hot-rollf!d steel bars - Pari 2. Di Standard finish or rungs shall be raw and without mension. ofsquare bars. preservation. 1) Forexample,..epeclfledIn ISO 3797:1976.Shipbuilding - Vertica' st~"add~rs. 1 IS 8450: 2009 ISO 9519: 1990 By "penal '1greernent only runqs may be sand 7 Mass bl'lsted and preserved The mass of a runq shall be 'IS follows Iype A ::::: 2.2 kg. 6 Dimensions type B ::::: 0.72 kg The dimensions 01rungsshall beIn accordancewith figurp1and figure2as appropriat« 8 Installation 8.1 Rungs shall be installed in accordance wilh 6.1 . Dimensions for type A figure3 The bottom rung shall be as near as poss ible to 300 mm above Ihe lower access level. Type A rungs shall meet the requirements shown in figure1 8.2 Rungs shall be welded 10Ihe ship's structure or to the ship's mast in such a way as to support a Where type A rungs are 10 be installed aqainst in load of 1000 N with a safety lactor 011:5. sulated walls. the leg-length of the rungs shall be lengthened. preferably to 300 mm AI the same time This can be achieved with one all-round fillet weld the clearance between the rung and the insulation of4 mrn minimum at the weld-on ends01the rungs. surface indicaled in figure3 shall be maintained If such 'I type of rung is needed. it shall be given as 9 Designation an plement 01Ihe designation For reference and 01derlnq purposes. rungs and ladders lormed from runqs according 10 Ihis Inler 6.2 Dimensions for type B national Standard shall be dpsignated as given in 91 and 92 Type B runge; shall mf'f'I the requlrpmpnls ..hown in fiqurp2 9.1 Elements for designation The following elements shall hI' indicated. in the or der given a) denomination rllng (lor a Single rung) or ladder Tolerances lor dimensrous III "gl/ll' t f1gllfe2 and (1m cornposiuon 01rungs). Ilgmt>J shatl correspond In accuracv QI<tde v (very roarse) glV('11 in ISO 27fill 1 0) number 01lhle; Inlern'ltionalSl;lOdard; ISO 9519: 1') f - __-. D,mens,c>nsInmillimelres ~- 150 , :I 300 of .....~! f...."'] : I -.t Developedlenqlh: - 228 Figure 2 - Rung type B Figure 1 - Rung type A 2 181410:2001 180 1511:1_ c) type. code letter: A or B (see clause 3); Rung ISO1511·A d) leg length (for insulated walls only): 300mm or more, as appropriate; e) number of rungs forming a ladder (for ladder designation. only). 9.2.2 Ea"'"torI8dder 9.2 Examples ofdesignation A ladder according to this International Standard, 9,2.1 Examplefor sIngle rong formed from rungs oftype B. numberof rungs 8. is designated as follows: A rung according to this International Standard, of type A, is designated as follows: L8dderISO9519-BI DImensIOnSInmItltmetres r 1 \ n?a~~ 0~~t).u .;1 ! tI"-W I I .g... o I .o... .2S0ax. ~==I-+-T--~ W I I ;;I : J. j i-~ .L.; J .. ,-- - - - Tolerances:see6.3. .1 t.dderforahip's structure bl ladder tor Ihip'.muts (formedfrom rungstypeAl (formedhomrungstype81 Figure 3 - Insullallon details 3 Bureau of Indian Standards BIS is a statutory institution established under the Bureau of tnose» Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications.No part of the these publications may be reproduced in any form without the pnor permission In wnting of BIS. This does not preclude the free use, in the course ofImplementing the standard.01 necessary details,such as symbols and sizes,type or grade designations. Enquiries rerannq to copynght be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically;astandardalongwithamendments isreaffirmedwhen such reviewindicates that nochanges are needed:ifthe review indicatesthat changes are needed,itistaken upfor revision. Users of Indian Standards should 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 (655). 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