BS 7419-1991 Specification for Holding down bolts
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728CC01F94F84F7DA6C231A481012F90 |
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文件大小(MB)： |
0.22 |
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页数： |
12 |
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日期： |
2010-10-4 |
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文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
BRITISH STANDARD BS 7419:1991,Specification for,Holding down bolts,BS 7419:1991,This British Standard, having,been prepared under the,direction of the General,Mechanical Engineering,Standards Policy Committee,was published under the,authority of the Standards,Board and comes,into effect on,29 March 1991,. BSI 12-1999,The following BSI references,relate to the work on this,standard:,Committee reference GME/9,Draft for comment 90/75944 DC,ISBN 0 580 19403 5,Committees responsible for this,British Standard,The preparation of this British Standard was entrusted by the General,Mechanical Engineering Standards Policy Committee (GME/-) to Technical,Committee GME/9, upon which the following bodies were represented:,BEAMA Ltd,British Constructional Steelwork Association Ltd,British Industrial Fasteners Federation,British Railways Board,British Steel Industry,British Steel Industry (Wire Section),Gauge and Tool Makers’ Association,Ministry of Defence,Society of Motor Manufacturers and Traders Limited,Washer Manufacturers’ Association of Great Britain,The following body was also represented in the drafting of the standard,through subcommittees and panels:,Steel Construction Institute,Amendments issued since publication,Amd. No. Date Comments,BS 7419:1991,. BSI 12-1999 i,Contents,Page,Committees responsible Inside front cover,Foreword ii,1 Scope 1,2 Dimensions 1,3 Characteristics 6,4 Complete designation for the purpose of an enquiry or order 6,Figure 1 — Dimensions of square head bolts 3,Figure 2 — Dimensions of hexagon head bolts 5,Table 1 — Dimensions of square head bolts 2,Table 2 — Dimensions of hexagon head bolts 4,Table 3 — Tolerance on nominal length 6,Table 4 — Preferred sizes 6,Table 5 — Characteristics 6,Publication(s) referred to Inside back cover,BS 7419:1991,ii . BSI 12-1999,Foreword,This British Standard has been prepared under the authority of the General,Mechanical Engineering Standards Policy Committee to provide a metric series,standard for holding down bolts.,A British Standard does not purport to include all the necessary provisions of a,contract. Users of British Standards are responsible for their correct application.,Compliance with a British Standard does not of itself confer immunity,from legal obligations.,Summary of pages,This document comprises a front cover, an inside front cover, pages i and ii,pages 1 to 6, an inside back cover and a back cover.,This standard has been updated (see copyright date) and may have had,amendments incorporated. This will be indicated in the amendment table on the,inside front cover.,BS 7419:1991,. BSI 12-1999 1,1 Scope,This British Standard specifies the general,dimensions, tolerances, materials and mechanical,properties for holding down bolts of product grade C,for use in connecting steel structures to their,foundations and in similar applications.,Bolts with square heads and square necks are,specified. Two possible forms of square neck are,covered.,Bolts with hexagon heads are also specified.,Other forms of holding down bolts are not covered.,NOTE The titles of the publications referred to in this standard,are listed on the inside back cover.,2 Dimensions,The general dimensions and tolerances of holding,down bolts with square heads and square necks,shall be as given in Table 1 and Table 3, and,Figure 1.,The dimensions and tolerances of holding down,bolts with hexagon heads shall be as given in,Table 2 and Table 3, and Figure 2.,NOTE 1 Preferred sizes for square and hexagon head holding,down bolts are listed in Table 4.,NOTE 2 Symbols and descriptions of dimensions may be found,in BS 6565. The symbol v is the dimension across flats of the,underhead square neck.,BS 7419:1991,2 . BSI 12-1999,Table 1 — Dimensions of square head bolts,Thread (d) M16 M20 M24 M30 M36 M42 M48 M56 M64,P (pitch) 2 2.5 3 3.5 4 4.5 5 5.5 6,b max. 122 127.5 133 140.5 148 155.5 163 172.5 182,min. 116 120 124 130 136 142 148 156 164,ds max. 16.7 20.84 24.84 30.84 37 43 49 57.2 65.2,min. 15.3 19.16 23.16 29.16 35 41 47 54.8 62.8,k nom. 10 12.5 15 18.7 22.5 26 30 35 40,min. 9.25 11.6 14.1 17.65 21.45 24.95 28.95 33.75 38.75,max. 10.75 13.4 15.9 19.75 23.55 27.05 31.05 36.25 41.25,r min. 0.6 0.8 0.8 1 1 1.2 1.6 2 2,s nom. = max. 24 30 36 46 55 65 75 85 95,min. 23.16 29.16 35 45 53.8 63.1 73.1 82.8 92.8,f nom. 8 10 12 15 18 21 24 28 32,min. 7.25 9.25 11.1 14.1 17.1 19.95 22.95 26.95 30.75,max. 8.75 10.75 12.9 15.9 18.9 22.05 25.05 29.05 33.25,v max. 16.7 20.84 24.84 30.84 37 43 49 57.2 65.2,min. 15.3 19.16 23.16 29.16 35 41 47 54.8 62.8,x max. 5 6.3 7.5 9 10 11 12.5 14 15,NOTE Dimensions are in millimetres.,BS 7419:1991,. BSI 12-1999 3,1) Incomplete threads, u ……
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