BS 5507-1-1977 Methods of test for falsework equipment - Floor centres《脚手架设备试验方法 第1部分 可调钢梁》.pdf
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1、BRITISH STANDARD BS 5507-1: 1977 Incorporating Amendment No. 1 Methods of test for Falsework equipment Part 1: Floor centres UDC 69.057.5:620.17BS5507-1:1977 This British Standard, having been prepared under the directionof the Builders Plant and Equipment Standards Committee, was published underthe
2、 authority of the Executive Board on 31August1977 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference PEB/1 Draft for comment 75/10230 DC ISBN 0 580 09875 3 Cooperating organizations The Builders Plant and Equipment Standards Committee, under whose direc
3、tion this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: British Mechanical Engineering Confederation Concrete Society Limited* Contractors Plant Association Department of the Environment, Building Res
4、earch Station* Federation of Civil Engineering Contractors Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive* National Association of Scaffolding Contractors* National Federation of Building Trades Employers* Royal Institute of British Architects Truck and
5、Ladder Manufacturers Association The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Aluminium Federation British Steel Industry Confederation of British Industry
6、 Construction Health and Safety Group Construction Industry Training Board Department of the Environment (PSA) Incorporated Association of Architects and Surveyors Institution of Civil Engineers Institution of Municipal Engineers Institution of Structural Engineers Prefabricated Aluminium Scaffoldin
7、g Manufacturers Association Amendments issued since publication Amd. No. Date of issue Comments 5360 May 1989 Indicated by a sideline in the marginBS5507-1:1977 BSI 10-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 Reference 1 3 Principles 1 4 Test arrangem
8、ent and apparatus 2 5 Testing procedure 3 6 Interpretation 4 7 Test report 4 Appendix A Checking previously used floor centres 5 Appendix B Basic considerations 5 Appendix C Uses of test report 6 Figure 1 Test 1 (for bending moment and deflection) 6 Figure 2 Test 2 (for shear and support forces) 7 F
9、igure 3 Test 3 (for interaction forces at lapped joint) 8 Figure 4 Test 4 (for intermediate propping force) 8 Figure 5 Cross sections at loading points 9 Figure 6 Support details in tests 1, 2 and 3 9 Publication referred to Inside back coverBS5507-1:1977 ii BSI 10-1999 Foreword The need to establis
10、h accurately the structural properties of equipment has become more important, and in consequence, the need to have satisfactory test methods. These should relate as closely to practice as possible and be completely reproducible. This British Standard, prepared under the direction of the Builders Pl
11、ant and Equipment Standards Committee, is the first of a series of test methods for common types of falsework equipment. Floor centres are usually of lattice construction with each unit consisting of two or more sections telescoping one within another. There are many practical difficulties in assess
12、ing the strength and other related properties of these units by analytical approach alone and it has become customary for the users to rely on safe load tables and other information largely based on test results and published in the suppliers literature. At present in the UK there is no generally re
13、cognized method of conducting these tests or interpreting their results. It is hoped the tests described here will provide a common and verifiable basis for the determination of structural properties. Using appropriate safety factors, load/span tables can be prepared. These methods can also be used
14、as a design tool when developing a new or modified type of floor centre, as an aid in quality control in production and for assessing the degree of serviceability of used floor centres. Guidance on the application of test1to the last kind is given in Appendix A. Guidance on which tests to use in par
15、ticular circumstances is obtainable from Appendix B, which sets down the basis on which tests were formulated. Appendix C suggests how the test data may most usefully be interpreted for the user. At least two tests of each type should normally be undertaken. The material of which the samples tested
16、are made will sometimes have significantly better properties than the minimum required by its specification. Thus the test results from such samples will give optimistic results for the equipment. Consideration was given to adjusting the results based on the relationship of minimum strength expected
17、 and that of the critical part of the centre. However, owing to the difficulty of setting down a precise and reliable method for local testing and adjustment of the properties it was not possible to include this proposal. Successful use of this standard method will produce more meaningful data from
18、fewer tests. It is hoped users will record problems so that if necessary improvements can be made in due course. The test methods specified in this standard provide information for the great majority of requirements. Where other tests are needed the information given will be of direct use in formula
19、ting them. 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
20、 comprises a front cover, an inside front cover, pages i and ii, pages1 to 10, 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.BS5507-1:1977 BS
21、I 10-1999 1 1 Scope Four tests are specified for establishing the structural properties of floor centres in respect of bending strength, deflection, shear, strength at the overlap and the effect of propping from below. These can be used both for initial assessment, and to assess used equipment. Meta
22、llurgical examination is not considered. 2 Reference The title of the publication referred to in this standard is shown on the inside back cover. 3 Principles 3.1 Symbols and subscripts. The following are the meanings of the main symbols and subscripts used in this standard. Symbols Subscripts The m
23、eanings of other symbols used are given in the text. 3.2 Definition. For the purposes of this Part of BS5507the following definition applies. floor centre an adjustable metal beam of two ormore telescoping sections usually of lattice construction used to support soffit formwork. Its use is structura
24、l 3.3 Accuracy of readings and tolerances. testloads, deflections and spans should be measured within the following limits. a) 0.04P or 0.02P ultwhichever is the more restrictive for the test load P; b) 1mm for the central deflection m ; c) 0.2mm for the local deformation p ; d) 5 mm for the clear s
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- BS550711977METHODSOFTESTFORFALSEWORKEQUIPMENTFLOORCENTRES 脚手架 设备 试验 方法 部分 可调 钢梁 PDF

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