《BS 1139-2.2-1991.pdf》由会员分享,可在线阅读,更多相关《BS 1139-2.2-1991.pdf(14页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 1139-2.2: 1991 Metal scaffolding Part 2: Couplers Section 2.2 Specification for steel and aluminium couplers, fittings and accessories for use in tubular scaffolding Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1139
2、-2.2:1991 This British Standard having been prepared under the direction of the Civil Engineering and Building Structures Standards Policy Committee was published under the authority of the Board of BSI and comes into effect on 31 January 1991 BSI 12-1998 First published, as BS 1139, November 1943 S
3、econd edition November 1951 Third edition June 1964 Fourth edition, as BS 1139-2, September 1982 Fifth edition, as BS 1139-2.2, January 1991 The following BSI references relate to the work on this standard: Committee reference CSB/57 Draft for comment 85/15498 DC ISBN 0 580 18899 X Committees respon
4、sible for this British Standard The preparation of this British Standard was entrusted by the Civil Engineering and Building Structures Standards Policy Committee (CSB/-) to Technical Committee CSB/57, upon which the following bodies were represented: Association of Consulting Engineers Association
5、of Consulting Scientists British Constructional Steelwork Association Ltd. British Steel Industry Building Employers Confederation Concrete Society Construction Health and Safety Group Construction Industry Training Board Department of the Environment (Property Services Agency) Electricity Supply In
6、dustry in England and Wales Engineering Equipment and Materials Users Association English Net Manufacturers Association Federation of Civil Engineering Contractors Health and Safety Executive Institute of Building Control Institution of Civil Engineers Institution of Structural Engineers National As
7、sociation of Scaffolding Contractors National Federation of Master Steeplejacks and Lightning Conductor Engineers Prefabricated Aluminium Scaffolding Manufacturers Association Suspended Access Equipment Manufacturers Association Amendments issued since publication Amd. No.Date of issueComments Licen
8、sed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1139-2.2:1991 BSI 12-1998i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Materials1 4Aluminium tensile strength, castings and hinge pins2 5Suitability o
9、f fittings2 6Fittings for close-jointed tubes2 7Design of fittings2 8Tests on fittings2 9Right angle couplers made of aluminium2 10Swivel couplers made of aluminium2 11Putlog couplers4 12Joint pins4 13Sleeve couplers made of aluminium4 14Reveal pins4 15Putlogs5 16Putlog ends5 17Base-plates5 18Adjust
10、able base-plates6 19Detachable castors6 20Toe board clips6 21Finish6 Figure 1 Test for distortion of right angle coupler made of aluminium3 Figure 2 Test for slip of right angle coupler made of aluminium3 Figure 3 Test for distortion of swivel coupler made of aluminium3 Figure 4 Test for slip of swi
11、vel coupler made of aluminium4 Figure 5 Rig for slip tests on putlog couplers made of aluminium or steel5 Figure 6 Test for bending putlog end6 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1139
12、-2.2:1991 ii BSI 12-1998 Foreword This Section of BS 1139 has been prepared under the direction of the Civil Engineering and Building Structures Standards Policy Committee (CSB/-). Together with BS 1139-2.1:1990 it supersedes BS 1139-2:1982, which is withdrawn. This Section covers couplers and fitti
13、ngs not included in BS 1139-2.1 and the requirements include those in BS 1139-2:1982. Progress is being made towards a full revision of these requirements, but as the major part of BS 1139-2 is superseded by BS 1139-2.1, it was deemed helpful to users to republish the remainder with the superseded t
14、ext omitted. A new edition of Section 2.2 incorporating additional couplers and fittings will be published when the revised requirements have been finalized. The revision of BS 1139-2 comprises two Sections: Section 2.1 Specification for steel couplers, loose spigots and base-plates for use in worki
15、ng scaffolds and falsework made of steel tubes. This standard is identical with EN 74 and covers the following couplers and fittings made of ferrous metals only: Right angle couplers Swivel couplers Sleeve couplers Loose spigots Parallel couplers Base-plates Section 2.2 Specification for steel and a
16、luminium couplers, fittings and accessories for use in tubular scaffolding. The products covered and their requirements are listed elsewhere in this standard. The strength requirements are given in SI units in accordance with current practice. BS 1139 is now published in separate Parts and Sections
17、as follows. Part 1: Tubes; Section 1.1: Specification for steel tube; Section 1.2: Specification for aluminium tube; Part 2: Couplers; Section 2.1: Specification for steel couplers, loose spigots and base-plates for use in working scaffolds and falsework made of steel tubes (Identical with EN 74); S
18、ection 2.2: Specification for steel and aluminium couplers, fittings and accessories for use in tubular scaffolding; Part 3: Specification for prefabricated access and working towers; Part 4: Specification for prefabricated steel splitheads and trestles; Part 51): Specification for materials, dimens
19、ions, design loads and safety requirements for service and working scaffolds made of prefabricated elements (Identical with HD 1000). 1) In preparation Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1139-2.2:1991 BSI 12-1998iii A British
20、 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 c
21、over, an inside front cover, pages i to iv, 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. Licensed Copy: sheffieldun sheffield
22、un, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1139-2.2:1991 BSI 12-19981 1 Scope This Section of BS 1139 specifies requirements for new steel and aluminium
23、alloy couplers and fittings for use with scaffolding used as temporary structures on which persons work and which provide support for the plant and materials used in building, constructional, maintenance, repair and demolition work. This British Standard does not cover any of the following couplers
24、and fittings which are made of rolled steel, forged steel, malleable cast iron or cast steel. Base-plates Loose spigots Parallel couplers Right angle couplers Sleeve couplers Swivel couplers The couplers and fittings listed above are covered in BS 1139-2.1:1990 which is identical with EN 74. NOTEThe
25、 titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard, the following definitions apply. 2.1 adjustable base-plate a base-plate embodying a screw jack 2.2 aluminium base-plate a plate for distributing the
26、load from a standard or raker 2.3 aluminium right angle coupler a coupler other than a putlog coupler, used for connecting tubes at right angles 2.4 castor a swivelling wheel attached to the lower end of a tubular column for the purpose of moving and supporting scaffolding 2.5 coupler a fitting by w
27、hich a grip is applied to the external surfaces of two tubes and which thereby holds them together 2.6 joint pin an internal fitting for joining two tubes end to end 2.7 putlog a tube or other member spanning from a horizontal member bearing on the wall of a building 2.8 putlog coupler a coupler use
28、d for fixing a putlog or transom to a ledger 2.9 putlog end a specially formed end of a putlog, or a fitting for attaching to a tube, for locating the member in a joint of a wall 2.10 reveal pin a fitting used for tightening a tube between two opposing surfaces 2.11 scaffolding a temporary structure
29、 on which persons work, and which provides support for the plant and materials used in building, constructional, maintenance, repair and demolition work 2.12 scaffold tube tubing which complies with either BS 1139-1.1 or BS 1139-1.2 3 Materials 3.1 General The fittings shall be free from flaws or ot
30、her defects. Bolts and hexagonal nuts shall be of steel and of a quality that complies with BS 916. Materials shall be free from any impurities and defects which might affect their satisfactory use. 3.2 Steel couplers and fittings Steel couplers and fittings together with the metallic parts of casto
31、rs shall be manufactured from steel complying with BS 4360, BS 970 or BS 1449. Where castings are used they shall comply with the requirements of BS 1452, BS 3100 or BS 6681. 3.3 Aluminium couplers and fittings Aluminium couplers and fittings together with the metallic parts of castors shall be manu
32、factured from an alloy complying with clause 4. Any steel components of such fittings shall comply with 3.1 and 3.2 and shall be suitably protected to prevent interaction between dissimilar materials. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy,
33、(c) BSI BS 1139-2.2:1991 2 BSI 12-1998 4 Aluminium tensile strength, castings and hinge pins 4.1 Tensile strength Lengths or strips cut from selected fittings shall show a 0.1 % proof stress of not less than 154 N/mm2 and an elongation of not less than 8 % measured in accordance with BS 18. NOTEThe
34、alloys 6082-TB, 2031-TB and 2014A-TB of BS 1472 (formerly HF30-W, HF12-W and HF15-W respectively) comply with these requirements. The 0.1 % proof stress shall not exceed 80 % of the tensile strength of the material. 4.2 Castings Cast components formed by sand or gravity casting shall comply with LM2
35、5TF or LM25TB7 of BS 1490. 4.3 Hinge pins Hinge pins made of aluminium shall comply with 6082-TF of BS 1473. 5 Suitability of fittings All fittings shall be capable of complying with this Section when used with all types of tube that comply with Section 1.1 or 1.2 of this standard, unless the suppli
36、er states that they are suitable for use only with certain types of tube. 6 Fittings for close-jointed tubes Fittings which are intended for use with close-jointed tubes (see note) and which rely upon a frictional grip on the external surface of the tube shall have a grip extending over not less tha
37、n 75 % of the circumference of the tube. They shall not exert a frictional grip on the internal surface of the tube. NOTESteel close-jointed tube is no longer included in BS 11391-1. 7 Design of fittings All fittings shall be designed for fixing in the normal manner for service as part of a scaffold
38、. The maximum force applied to fittings, when in use, shall not exceed 6.25 kN except where a greater load is specified by the manufacturer. NOTEFor information on the safe working loads for specific types of coupler, reference should be made to Table 17 of BS 5973:1990 and Table 24 of BS 5975:1982.
39、 The various parts of the couplers and fittings shall be firmly attached to each other unless the design precludes this and it is impossible for the coupler or fitting under load to remain in position on the tubes without all its parts. 8 Tests on fittings Tests on fittings shall be carried out by f
40、ixing the fittings to be tested to tubes that comply with BS 1139-1.1 or BS 1139-1.2 and which are clean, smooth and free from corrosion. If fittings are supplied as being suitable for particular types of tube (welded, seamless, or close-jointed steel (see note) or aluminium alloy) they shall be tes
41、ted on tubes of those particular types. NOTESteel close-jointed tube is no longer included in BS 1139. For the purposes of the tests the fittings shall be properly fixed by means of the tool normally supplied for the particular type of fitting. The fitting shall be capable of passing the necessary t
42、ests without damage which would render the fitting, or the tube or tubes with which it is tested, unserviceable for further use in scaffolding. 9 Right angle couplers made of aluminium A right angle coupler made of aluminium shall be capable of passing the following tests. a) Test for distortion. Th
43、e coupler, connecting two tubes at right angles and suitably prevented from slip-ping on the vertical tube, as shown in Figure 1, shall be capable of supporting, without distortion, a load of 29.8 kN applied to the horizontal tube. b) Test for slip. The coupler connecting two tubes at right angles,
44、as shown in Figure 2 shall be capable of sustaining a load of 12.4 kN applied to the horizontal tube. During this test the coupler shall not rotate through an angle exceeding 10 from the horizontal. In carrying out the tests described in a) and b), the coupler shall be tested with each gripping surf
45、ace in turn subjected to distortion and slip respectively and with the test load applied successively in reverse directions for each coupler position. 10 Swivel couplers made of aluminium A swivel coupler made of aluminium shall be designed and constructed so that the swivelling faces are smooth and
46、 in sufficiently close contact to prevent the connecting pin being subjected to bending stresses. This requirement, however, shall not prohibit a washer of adequate bearing area being interposed between the faces of the coupler, provided it is an exact fit on the pin and the coupler is not rendered
47、less efficient by the use of the washer. The pin connecting the two parts of a swivel coupler shall be of steel and not less than 15.9 mm in diameter. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:22:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1139-2.2:1991 BSI 12-19983 A swivel cou
48、pler shall be capable of passing the following tests. a) Test for distortion. The coupler, connecting two tubes at 45 angle and suitably prevented from slipping on both tubes as shown in Figure 3, shall be capable of supporting, without distortion, a load of 14.9 kN. b) Test for slip. The coupler, c
49、onnecting two tubes at 45 angle as shown in Figure 4, shall be capable of sustaining a load of 12.4 kN applied to the vertical tube. During this test the coupler shall not rotate through an angle greater than 10 from the horizontal. In carrying out the tests described in a) and b), the coupler shall be tested with each gripping surface in turn subjected to distortion and slip respectively and with the test load applied successively in reverse directions for each coupler position. Figure 1 Test for distortion of right angle coupler made
链接地址:https://www.31doc.com/p-3730378.html