1、BRITISH STANDARD BS 3572:1986 Incorporating Amendment No. 1 Specification for Access fittings for chimneys and other high structures in concrete or brickwork UDC 697.85.012:692.9BS3572:1986 This British Standard, having been prepared under the directionof the Civil Engineering and Building Structure
2、s Standards Committee, was published under the authority of the Board of BSI and comes intoeffect on 31 January 1986 BSI 08-1999 First published December 1962 First revision January 1986 The following BSI references relate to the work on this standard: Committee reference CSB/28 Draft for comment 84
3、/11022 DC ISBN 0 580 14713 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Civil Engineering and Building Structures Standards Committee (CSB/-) to Technical Committee CSB/28, upon which the following bodies were represented: Agricultu
4、ral and Allied Workers National Trade Group Agricultural Engineers Association British Flue and Chimney Manufacturers Association Building Employers Confederation Department of Agriculture and Fisheries for Scotland Electronic Engineering Association Engineering Equipment and Materials Users Associa
5、tion Health and Safety Executive Institution of Civil Engineers Institution of Structural Engineers National Federation of Master Steeplejacks and Lightning ConductorEngineers Refractory Contractors Association Suspended Access Equipment Manufacturers Association Union of Construction, Allied Trades
6、 and Technicians Amendments issued since publication Amd. No. Date of issue Comments 8078 February 1994 Indicated by a sideline in the marginBS3572:1986 BSI 08-1999 i Contents Page Committees responsible Inside front cover Foreword iii Section 1. General 1 Scope 1 2 Definitions 1 3 Material quality
7、1 Section 2. Sockets for embedding in concrete 4 Materials 2 5 Workmanship 2 6 Design 2 7 Construction 2 8 Dimensions 2 9 Greasing 2 10 Marking 3 Section 3. Sockets for embedding in brickwork 11 Materials 4 12 Workmanship 4 13 Design 4 14 Construction 4 15 Dimensions 4 16 Greasing 4 17 Marking 4 Sec
8、tion 4. Cappings 18 Materials 5 19 Workmanship 5 20 Design and construction 5 21 Dimensions 5 22 Greasing 5 Section 5. Screw-in hooks 23 Materials 6 24 Workmanship 6 25 Heat treatment 6 26 Design 6 27 Construction 6 28 Dimensions 6 29 Marking 6 Section 6. Screw-in eyes 30 Materials 7 31 Workmanship
9、7 32 Heat treatment 7 33 Design 7 34 Construction 7 35 Dimensions 7 36 Marking 7 Section 7. Stepirons for embedding in concrete and brickwork 37 Materials 8 38 Workmanship 8 39 Design 8BS3572:1986 ii BSI 08-1999 Page 40 Construction 8 41 Dimensions 8 42 Marking 8 Appendix A General recommendations o
10、n the methods of use of access fittings 9 Appendix B Recommendations on the methods of use of sockets 9 Appendix C Examination of the cross section of sockets 10 Appendix D Recommendations on the methods of use of cappings 10 Appendix E Recommendations on the methods of use of screw-in hooks 10 Appe
11、ndix F Recommendations on the methods of use of screw-in eyes 10 Appendix G Recommendations on the methods of use of stepirons 10 Figure 1 Typical sockets for embedding in concrete 11 Figure 2 Typical sockets for embedding in brickwork 12 Figure 3 Typical capping 13 Figure 4 Typical screw-in hook 13
12、 Figure 5 Typical screw-in eye 14 Figure 6 Typical stepiron 14 Figure 7 Typical arrangement of sockets and of horizontal accessstepironsona chimney 15 Figure 8 Typical arrangement of stepirons on developed face of a structure 15 Figure 9 Suitable plate for thread identification 16 Table 1 Alloys for
13、 sockets 2 Table 2 Dimensions for screw-in hooks 6 Table 3 Dimensions for screw-in eyes 7 Table 4 Alloys for stepirons 8 Table 5 Dimensions for stepirons 8 Publications referred to Inside back coverBS3572:1986 BSI 08-1999 iii Foreword This revision of this British Standard has been prepared under th
14、e direction of the Civil Engineering and Building Structures Standards Committee. It supersedes BS3572:1962 which is withdrawn. This standard is complementary to BS3678. For permanently fixed steel ladders, reference should be made to BS4211. The standard is only intended to cover suitable materials
15、 for the manufacture of fittings described inclause1. Recommendations are made for the use of these fittings in appendices. It is to be noted that better materials are now available for the manufacture of access fittings than some that have been previously used and materials specified in this standa
16、rd are those that are felt to be the most suitable, but this is not necessarily to be taken as implying that others are completely unsatisfactory. Attention is drawn to the change in the specified thread form from Whitworth to M20ISO coarse thread, medium fit, and to the recommended precautions. It
17、is recommended that the specifier, or his representative, be permitted access to where the fittings are made in order that he may examine and sample the materials and the finished fittings. Attention is drawn to the purchasers right to require a certificate of compliance with this standard and to a
18、possible reference to it in the contract between supplier and purchaser. The provisions of this standard apply only to normal format bricks since the size and shape of the fittings preclude satisfactory use in thicker units such as concrete blocks. To ensure to their satisfaction that products claim
19、ed to comply with this BritishStandard consistently achieve the required level of quality, purchasers ordering to this standard are advised to specify in their purchasing contract that the supplier operate a quality system in compliance with BS5750. A British Standard does not purport to include all
20、 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 to i
21、v, pages1to 16, 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.iv blankBS3572:1986 BSI 08-1999 1 Section 1. General 1 Scope This British Stand
22、ard specifies requirements for the following groups of fittings to provide means of access for inspection and maintenance by steeplejacks and similar trades who normally fit their own ladders. a) Sockets for embedding in concrete and brickwork. b) Cappings for sockets. c) Screw-in fittings, i.e. scr
23、ew-in hooks and screw-in eyes. The requirements specified for the fittings are in respect of materials, workmanship, design, construction and dimensions. General recommendations on the methods of use of access fittings are given inAppendix A. NOTEThe titles of the publications referred to in this st
24、andard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2.1 access fitting a fitting provided to afford access up and down or around a chimney or other high structure, e.g.socket, capping, screw-in fitting or stepiron 2.2 s
25、ocket a metal unit that provides a threaded hole to receive a screw-in fitting and is intended to be built into a chimney or other high structure 2.3 capping a flanged plug intended to be screwed into a socket in order to protect the screw thread and the exposed face of the socket between periods of
26、 use 2.4 screw-in fitting a detachable hook or eye that is intended to be secured by screwing into a socket 2.5 stepiron a metal unit that is intended to be built into a chimney or other high structure to provide one of a series of permanent foot steps or hand holds spaced at suitable intervals 3 Ma
27、terial quality All access fittings shall be made from material complying with the ingot tests of the respective British Standards, and when given a visual examination shall be free from surface defects of the exposed face of all fittings and flaws in the screwed thread of access sockets, hooks and e
28、yes.BS3572:1986 2 BSI 08-1999 Section 2. Sockets for embedding in concrete NOTERecommendations on the methods of use of sockets for embedding in concrete are given inAppendix B. 4 Materials Sockets for embedding in concrete shall be cast or wrought from one of the alloys given inTable 1. Table 1 All
29、oys for sockets 5 Workmanship Sockets shall be sound and free from laps, holes and sand pitting. Surfaces shall be clean, non-porous and free from sand. Sockets shall be neatly dressed and shall not be burned, stopped, patched or plugged. A cross section shall be free from porosity, burning or blist
30、ers and shall have a homogeneous texture on visual examination. NOTESome guidance on examination of cross section is given inAppendix C. 6 Design Sockets shall comply with the following. a) The shape of the socket shall be such that it will not rotate when in use. b) The socket, when embedded in con
31、crete, shall provide anchorage without any reliance being placed on the bond between the concrete and the socket. NOTE 1Details of sockets which, when tested for anchorage in concrete, have proved satisfactory are shown inFigure 1. c) The section shall be such as to ensure full compaction all round
32、when embedded in concrete. NOTE 2These requirements assume that the socket is built in flush with the face of the structure. Every socket shall have cast recessed figures and letters10mm high as shown inFigure 1. Every socket shall be provided with a capping that complies with section 4 of this Brit
33、ish Standard. 7 Construction If sockets consist of two or more parts (excluding back end plugs) the parts shall be bolted or screwed together. NOTEIt is preferable for sockets to be made in one piece. The hole for the attachment of the screw-in hook or screw-in eye shall be of the dimensions specifi
34、ed in clause8 and shall be threaded with an M20ISO coarse thread, medium fit, complying with BS3643-2. If the hole is threaded right through the socket from front to back, a screwed plug made of the same material as the socket shall be inserted in the back end of the socket. The back end of the plug
35、 and of the socket shall be flush and the plug shall be secured in position by local deformation, e.g. by centre punching. If a separable flange is used for anchoring the socket, the flange and the screw plug shall be made in one piece. 8 Dimensions The dimensions of the sockets shall be as follows.
36、 a) The clear depth of the hole shall be not less than80mm. b) The length of the thread provided to take the screw-in fittings shall be not less than55min. c) The engagement of a screwed plug shall be not less than25mm. d) The minimum thickness of metal in the wall of the socket measured from the ro
37、ot of the thread shall be12mm. 9 Greasing The exposed face of each socket shall be greased. BS number Material Alloy designation BS1400 Nickel gunmetal G3 BS1400 87/7/3/3 leaded gunmetal LG4 BS1400 Aluminium bronze (copper-aluminum) AB2 BS2874 10% aluminium bronze copper-aluminium- nickel-iron) CA10
38、4 BS3071 Nickel-copper (1%silicon) NA1 BS3076 Nickel-copper NA13 a a This alloy should preferably be used in the hot-rolled condition.BS3572:1986 BSI 08-1999 3 10 Marking Sockets shall be clearly and indelibly stamped on the face with the following: a) the number and date of this British Standard, i
39、.e. BS3572:1986 1) ; b) the number and date of the British Standard 1)with which the material of the socket complies; c) the relevant alloy designation, if any, of the appropriate British Standard given in b) for the material from which the socket is manufactured. NOTECare should be taken that the i
40、ndentation is neither too sharp nor too deep. 1) Marking BS 3572:1986 or any other BS number on or in relation to a product is a claim by the manufacturer that the product has been manufactured in accordance with the requirements of the standard. The accuracy of such a claim is therefore solely the
41、manufacturers responsibility. Enquiries as to the availability of third party certification to support such claims should be addressed to the Director, Quality Assurance Division, BSI, PO Box375,Milton Keynes MK146LO in the case of certification marks administered by BSI or to the appropriate author
42、ity for other certification marks.BS3572:1986 4 BSI 08-1999 Section 3. Sockets for embedding in brickwork NOTERecommendations on the methods of use of sockets for embedding in brickwork are given inAppendix B. 11 Materials Sockets for embedding in brickwork shall be cast or wrought from one of the m
43、aterials given inTable 1. 12 Workmanship The workmanship of sockets for embedding in brickwork shall be in accordance with clause5. 13 Design Sockets shall comply with the following. a) The shape of the socket shall be such as to provide anchorage behind the face bricks. b) The socket, when embedded
44、 in brickwork, shall provide anchorage without any reliance being placed on the bond between the mortar and the socket. NOTE 1These requirements assume that the socket is built in flush with the face of the structure. NOTE 2Figure 2 shows a typical socket for embedding in brickwork. Every socket sha
45、ll have cast recessed figures and letters10mm high as shown inFigure 2. Every socket shall be provided with a capping that complies with section 4 of this British Standard. 14 Construction The construction of the socket shall comply with clause7. 15 Dimensions The dimensions of the socket shall comp
46、ly with clause8. 16 Greasing The exposed face of each socket shall be greased. 17 Marking Sockets shall be clearly and indelibly stamped on the face with the following: a) the number and date of this British Standard, i.e. BS3572:1986 2) ; b) the number and date of the BritishStandard 2) with which
47、the material of thesocket complies; c) the relevant alloy designation, if any, of the appropriate British Standard given in b) for the material from which the socket is manufactured. NOTECare should be taken that the indentation is neither too sharp nor too deep. 2) See footnote to clause10.BS3572:1
48、986 BSI 08-1999 5 Section 4. Cappings NOTERecommendations on the methods of use of cappings are given inAppendix D. 18 Materials A capping shall be made either of the same material as the socket in which it is to be inserted or of polyethylene containing carbon black and complying with type A: class
49、 W of BS3412. 19 Workmanship When the capping is made of the same material as the socket into which it is to be inserted it shall be sound and free from laps, holes and sand pitting. Surfaces shall be clean, non-porous and free from sand. The capping shall be neatly dressed and shall not be burned, stopped, patched or plugged. 20 Design and construction Cappings shall be constructed in one piece and shall consist of a head and a threaded shank. The head of the capping shall be capable of being turned both by a screwdriver and by a persons thumb and f
