BS 5507-3-1982 Methods of test for falsework equipment - Props《脚手架设备的试验方法 支柱》.pdf

1、BRITISH STANDARD BS 5507-3: 1982 Methods of test for Falsework equipment Part 3: Props UDC 69.057.5:624.023.9:620.17BS5507-3:1982 This British Standard, having been prepared under the directionof the Civil Engineeringand Building Structures Standards Committee,was published underthe authority ofthe

2、BoardofBSI and comes intoeffecton 26February1982 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference CSB/46 Draft for comment 81/10645 DC ISBN 0 580 12689 7 Cooperating organizations The Civil Engineering and Building Structures Standards Committee, unde

3、r whose direction this British Standard was prepared, consists of representatives from the following: Aluminium Federation* Association of Consulting Engineers Brick Development Association British Precast Concrete Federation Ltd. British Steel Corporation British Steel Industry* Cement and Concrete

4、 Association Concrete Society Limited* Consumer Standards Advisory Committee of BSI Convention of Scottish Local Authorities County Surveyors Society Department of the Environment (PSA)* Department of the Environment (Building Research Establishment)* Department of the Environment (Housing and Const

5、ruction) Department of the Environment (Water Engineering Division including Water Data Unit) Department of Transport Federation of Civil Engineering Contractors* Health and Safety Executive* Institution of Civil Engineers* Institution of Municipal Engineers* Institution of Public Health Engineers I

6、nstitution of Structural Engineers* Institution of Water Engineers and Scientists London Transport Executive Ministry of Agriculture, Fisheries and Food National Federation of Building Trades Employers* National Water Council Royal Institute of British Architects Scottish Development Department Timb

7、er Research and Development Association Trades Union Congress The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this British Standard: Association of Consulting Scientists C

8、onfederation of British Industry Construction Health and Safety Group Construction Industry Training Board Electricity Supply Industry in England and Wales Incorporated Association of Architects and Surveyors National Association of Scaffolding Contractors Prefabricated Aluminium Scaffolding Manufac

9、turers Association Amendments issued since publication Amd. No. Date of issue CommentsBS5507-3:1982 BSI 09-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Principle 1 4 Apparatus 1 5 Test procedure 1 6 Recording of test load 1 7 Test report 1

10、Figure 1 Arrangement of test apparatus 2 Figure 2 Examples of props that have set with an angle at the junction of the two halves 3 Publications referred to Inside back coverBS5507-3:1982 ii BSI 09-1999 Foreword This British Standard, prepared under the direction of the Civil Engineering and Buildin

11、g Structures Standards Committee, is the third Part in a series of test methods for common types of falsework equipment. Other Parts in the series are: Part 1: Floor centres; Part 2: Prefabricated heavy duty support towers 1) . Appendix A of BS 4074:1966 described a method of test for props. During

12、revision of the standard it was considered useful to publish the method as a separate document. This should facilitate application of the method in the testing and assessment of equipment to verify its load carrying capacity either in conjunction with the performance requirements of BS4074 or as par

13、t of a test programme for the assessment of novel designs of equipment not complying with the requirements of BS 4074. BS 4074 describes a method of assessment using the results obtained from tests carried out in accordance with this standard. This method of test differs from that described in Appen

14、dix A of BS 4074:1966. The latter described a load test method requiring the use of spherical joints at each end of the prop under investigation. However, continued use of the method indicated that the results obtained could not be directly related to propping practice. This limited the usefulness o

15、f the results. This revised method requires that the prop under test be positioned such that its verticality and the point of application of the load are more typical of site conditions 2) . It requires that the prop be erected 1 30 out of plumb as research has shown that this is the maximum toleran

16、ce from vertical that should be allowed. To avoid an excessive amount of testing only one loading condition is considered, that is with the load applied concentrically. Eccentric loading may occur on site and this condition is considered in BS 4074. A British Standard does not purport to include all

17、 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

18、ii, pages1 to 4, 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. 1) In course of preparation. 2) For further information on the principles and

19、 development of this method of test, reference should be made to CIRIA Technical Note No. 79 Safe working loads for adjustable props: the influence of prop conditions and site workmanship, 1977.BS5507-3:1982 BSI 09-1999 1 1 Scope This British Standard describes a method of test for the purpose of de

20、termining the ultimate load carrying capacity of props. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3 Principle The test simulates the condition of a prop erected130 out of plumb and supporting a concentrically positioned co

21、mpressive load. 4 Apparatus 4.1 Compression testing machine. A compression testing machine of suitable capacity 3)for the test that is capable of applying the load at the rate specified in 5.6 and that complies with the requirements for grade B of BS 1610 as regards repeatability and accuracy. 4.2 S

22、teel joist. A steel joist of section 76 mm 76 mm having a density of 12.65 kilogram per metre length. NOTEThe joist specified for the test has characteristics tosimulate loading the props through a concentrically positioned175 mm 75 mm timber beam. Timber joists havenotbeen used as experience has sh

23、own that they producevariable test results, particularly at higher loads. 5 Test procedure NOTEThe following procedure refers to the prop being tested in the vertical position. However, props may be tested either vertically or horizontally. If the test is carried out with the prop horizontal it is p

24、ermissible to counteract the initial deflection of the prop due to its own mass by applying an upward force at the centre of the prop equal to one-half the mass of the prop. This force should act throughout the test. 5.1 Arrange the apparatus as shown inFigure 1. The test load shall be restrained ag

25、ainst lateral movement. 5.2 Erect the prop under test such that it is 130 out of plumb and orientated such that the pin holes and slots are in the most adverse bending direction (as shown inFigure 1). Support the base plate of the outer tube on a flat surface of steel or concrete. Do not fix or clam

26、p the base plate on any surface. 5.3 For the purpose of testing in the fully closed position insert the pin in the top-most hole of the inner tube and adjust the screwed collar so that there is a minimum gap of5mm between the end of the inner tube and the adjacent base plate of the outer tube. Addit

27、ionally, there shall be a minimum gap of3mm between the pin and the bottom of the slot. For the fully extended position insert the pin in the lowest hole of the inner tube and adjust the screwed collar so that the gap between the pin and top of the slot is approximately3mm. 5.4 If, when erected and

28、before the application of a load, the prop takes up a natural “set” in which the centreline of the two halves of the prop are not exactly in line, measure the angle of inclination as indicated in Figure 2. No wedges or packing of any description shall be inserted between the inner and outer tubes in

29、 an attempt to improve the initial straightness of the prop. 5.5 Record the actual overall length of the prop from base plate to head plate before applying the test load. 5.6 Place the steel joist concentrically on, but do not fix it to, the end plate of the inner tube of the prop. Apply an axial co

30、mpressive load at a rate not exceeding 5 kN/min until the prop fails. Take the failure load as the maximum load attainable during the test. NOTEThe joist may be used for a number of tests but should be discarded when it becomes visibly distorted. 6 Recording of test load Record the load achieved on

31、the completion of the test, quoting it in kilonewtons to the nearest0.5kN. 7 Test report 7.1 Contents. The test report shall include the following information. a) Adequate information by means of which the specimens tested can be reliably identified; this may be in the form of manufacturers drawings

32、, specially prepared sketches or extracts from trade catalogues. The type, the mark and the year of manufacture (if known) of the units shall be given. b) Sufficient information on the arrangement of the test apparatus and any special features of it to allow the test to be repeated in all its essent

33、ials solely on the basis of the information contained in the report and in this standard. c) The test results (seeclause6). 3) The capacity of a testing machine is suitable when the expected load of failure of the prop lies in the upper four-fifths of the selected range of the machine being used.BS5

34、507-3:1982 2 BSI 09-1999 d) Other information relevant to the test, for example the organization commissioning the test, the testing laboratory, the date of the test and comments on the behaviour of the units under test loads, including a description of failure modes and the location of any point of

35、 failure. 7.2 Presentation of test results. The test results shall be presented in the report in a concise and unambiguous manner, preferably in tabular form. 7.3 Test description. Without any of the information specified in7.1 being omitted, the descriptive contents of the report should be as brief

36、 as practicable with the minimum information necessary to make it a self-contained document. Dimensioned sketches should be used in preference to purely verbal descriptions. The report may be supplemented by photographs and other descriptive material. 7.4 Authenticity of report. The test report shal

37、l be authenticated by a person in authority and his status and qualifications given. NOTERestrain the platen against lateral movement. Figure 1 Arrangement of test apparatusBS5507-3:1982 BSI 09-1999 3 Figure 2 Examples of props that have set with an angle at the junction of the two halves4 blankBS55

38、07-3:1982 BSI 09-1999 Publications referred to BS 1610, Methods for the load verification of testing machines. BS 4074, Specification for metal props and struts 4) . 4) Referred to in the foreword only.BS 5507-3: 1982 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the

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