1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 16031:2012Adjustable telescopicaluminium props Productspecifications, design andassessment by calculation andtestsBS EN 16031:2012 BRITISH STANDARDNational forewordThis Bri
2、tish Standard is the UK implementation of EN 16031:2012.The UK participation in its preparation was entrusted to TechnicalCommittee B/514, Access and support equipment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport t
3、o include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 76455 4ICS 91.220Compliance with a British Standard cannot confer immunity fromlegal obligations.This Br
4、itish Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2012.Amendments issued since publicationDate Text affectedBS EN 16031:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16031 May 2012 ICS 91.220 English Version Adjustable telescopic alu
5、minium props - Product specifications, design and assessment by calculation and tests Etais tlescopiques rglables en aluminium - Spcifications du produit, conception et valuation par calculs et essais Bausttzen aus Aluminium mit Ausziehvorrichtung - Produktfestlegungen, Bemessung und Nachweis durch
6、Berechnung und Versuche This European Standard was approved by CEN on 28 April 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists a
7、nd bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the
8、 responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germa
9、ny, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR
10、NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16031:2012: EBS EN 16031:2012EN 16031:2012 (E) 2 Contents PageForeword 4Introduction . 51 Scope 62 Normative referenc
11、es 63 Terms and definitions . 64 Symbols 95 Classification . 106 Designations 117 Materials . 128 Requirements . 128.1 Tubes 128.2 Welding . 128.3 Length adjustment device 128.4 Permanent prevention against unintentional disengagement 128.5 Anti hand trap 138.6 Overlapping length 138.7 Endplates 149
12、 Verification . 149.1 General 149.2 Calculation of prop strength. 159.2.1 General 159.2.2 Imperfections . 159.2.3 Behaviours of inner and outer tube . 179.2.4 Boundary conditions . 179.2.5 Verification of prop strength 219.3 Verification of the strength of length adjustment device 229.4 Verification
13、 of the prevention against unintentional disengagement 229.5 Confirmation of the calculation results by testing . 2210 Tests 2210.1 General 2210.2 Detail tests 2210.2.1 Compression tests on unthreaded tubes 2210.2.2 Compression tests on threaded tube 2310.2.3 Bending tests on threaded tube . 2510.2.
14、4 Tests for the limit eccentricities of prop ends 2710.2.5 Compression tests on length adjustment device 3010.3 Test of the prevention against unintentional disengagement 3010.3.1 Purpose of test . 3010.3.2 Test arrangement . 3110.3.3 Evaluation of test results 3110.4 Confirmation test for the prop
15、strength 3110.4.1 Material properties . 3110.4.2 Global test 3211 Documentation of test results 32BS EN 16031:2012EN 16031:2012 (E) 3 Page12 Marking . 3213 Assessment . 3314 User manual . 33Annex A (informative) Ongoing production control 34Bibliography 36BS EN 16031:2012EN 16031:2012 (E) 4 Foreword
16、 This document (EN 16031:2012) has been prepared by Technical Committee CEN/TC 053 “Temporary works equipment”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the lates
17、t by November 2012, and conflicting national standards shall be withdrawn at the latest by November 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all
18、such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hunga
19、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16031:2012EN 16031:2012 (E) 5 Introduction This European Standard deals with the more common types o
20、f adjustable telescopic aluminium props in current use. It is not intended to prevent development of other types of props. For example, props may have hinged ends or other length adjustment devices or be made of other materials. Whilst such props cannot comply with this European Standard, it is neve
21、rtheless recommended that the principals of this European Standard be considered in the design and assessment of such props. This European Standard is a product standard primarily for use in the field of falsework and formwork standardized in EN 12812. The specified values for load bearing capacity
22、listed in this European Standard are figures for classification. For site use, F and M can be found in EN 12812. BS EN 16031:2012EN 16031:2012 (E) 6 1 Scope This European Standard specifies materials, design requirements and designation together with assessment methods using both calculations and te
23、sting for adjustable telescopic aluminium props which are intended for use on construction sites. It outlines eleven classes of nominal specified values for strengths for adjustable telescopic aluminium props, each having a series of maximum extended lengths. 2 Normative references The following doc
24、uments, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 74-1, Couplers, spigo
25、t pins and baseplates for use in falsework and scaffolds Part 1: Couplers for tubes Requirements and test procedures EN 74-2, Couplers, spigot pins and baseplates for use in falsework and scaffolds Part 2: Special couplers Requirements and test procedures EN 1999-1-1, Eurocode 9: Design of aluminium
26、 structures Part 1-1: General structural rules EN 1065:1998, Adjustable telescopic steel props Product specifications, design and assessment by calculation and tests EN 1090-3:2008, Execution of steel structures and aluminium structures Part 3: Technical requirements for aluminium structures EN 1020
27、4:2004, Metallic materials Types of inspection documents EN 12811-1, Temporary works equipment Part 1: Scaffolds Performance requirements and general design EN 12811-2:2004, Temporary works equipment Part 2: Information on materials EN 12811-3:2002, Temporary works equipment Part 3: Load testing EN
28、12812, Falsework Performance requirements and general design 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 adjustable telescopic aluminium prop compression member consisting of two tubes circular or profiled which are telescopically displac
29、eable within each other with a length adjustment device with threaded inner tube (see Figure 1) or with a pin inserted into holes in the inner tube and a mean of fine adjustment using a threaded collar (see Figure 2) Note 1 to entry: Such props are normally used as a temporary vertical support in co
30、nstruction works. 3.2 endplate plate which is fixed at right angles to one end of inner and outer tube BS EN 16031:2012EN 16031:2012 (E) 7 3.3 collar nut nut internally threaded to provide fine length adjustment to the prop to transfer the force from the inner to the outer tube either to a threaded
31、inner tube or through a pin 3.4 inner tube smaller tube that may be profiled or provided with thread or holes for the coarse adjustment of the prop 3.5 outer tube larger tube that may be profiled, one end of which could be threaded externally (see Figure 1 and 2) 3.6 length at maximum extension nomi
32、nal distance measured between the outside faces of the endplates when the prop is in the fully extended position (fully opened) 3.7 length at minimum extension nominal distance between the outside faces of endplates when the prop is in the fully closed position 3.8 minimum working length nominal dis
33、tance between the outside faces of the endplates necessary to allow safely the dismounting and removal of prop 3.9 safety devices devices to prevent unintentional disengagement of the inner and outer tube and/or devices to guarantee the minimum overlapping length 3.10 pin part of the length adjustme
34、nt device which is inserted through the inner tube holes and is secured to the prop 3.11 working load nominal characteristic strength of the prop for different classes divided by at least the safety factors given in EN 12812 Note 1 to entry: Safety factors can be greater in national regulations. BS
35、EN 16031:2012EN 16031:2012 (E) 8 Key1 endplates 2 outer tube 3 inner tube 4 length adjustment device (collar) 5 locking (security) device Figure 1 Example of adjustable telescopic aluminium prop (type 1) Key1 endplate 2 outer tube 3 inner tube 4.1 attached pin 4.2 collar nut 4.3 handle 5 central hol
36、e 6 connection holes 7 pin hole Figure 2 Example of adjustable telescopic aluminium prop (type 2) BS EN 16031:2012EN 16031:2012 (E) 9 4 Symbols Symbol Designation Unit Diouter diameter of the inner tube mm mD collar nut major thread diameter mm pD diameter of the pin mm coreb,e eccentricity at the b
37、ase at which the spring becomes effective mm e(N) limiting eccentricity of the axial forces mm cbspring stiffness N mm/rad limitb,e unit eccentricity at the base mm b,0e initial eccentricity at the base mm eteccentricity at the top mm fyyield strength N/mm2actyfactual yield strength N/mm2nomyf nomin
38、al yield strength N/mm2f0characteristic value of proof strength at the transitions point between prop and base plate N/mm2f0,HAZcharacteristic value of proof strength at the transitions point between prop and base plate determined by taking the heat effected zone into account N/mm2l actual extension
39、 length of the prop m maxl length of a prop at maximum extension m 0loverlapping length mm plM plastic moment resistance of the cross section kN m Npl,M reduced plastic moment resistance of the cross section kN m N normal (axial) force kN NR,kcharacteristic compression resistance kN iC,N ideal buckl
40、ing force kN plN nominal plastic compression resistance of the cross section kN R strength of a prop kN tb,R bearing resistance of the tube kN pR shear resistance of the pin kN uR failure load of a test kN BS EN 16031:2012EN 16031:2012 (E) 10 Symbol Designation Unit acty,R actual characteristic stre
41、ngth of the prop class y where y corresponds to classes from A to W kN ky,R nominal characteristic strength of the prop class y where y corresponds to classes from A to W kN ty,R lowest evaluated test result in the global test kN ay,R average value test result in the global test kN kad,R characteris
42、tic strength in compression kN V vertical load kN 0angle of inclination between the inner and outer tube rad M partial safety factor for the resistance 1 M1 ,M2 splitted partial safety factors for the material 1 F partial safety factor for the action 1 5 Classification Adjustable telescopic aluminiu
43、m props shall be classified according to its specified value for nominal characteristic strength Ry,kgiven in Table 1 (load classes) and its maximal extension length maxl given in Table 2 (length classes). Table 1 Load classes of adjustable telescopic aluminium props Load class Specified value for n
44、ominal characteristic strength Ry,kA kN0,440,512maxllB kN0,510,682maxllC kN5,590,1022maxllD 34,0 kNE 51,0 kNR 66,0 kNS 82,5 kN T 99,0 kNU 115,5 kNV 132,0 kNW 148,5 kN BS EN 16031:2012EN 16031:2012 (E) 11 Where maxl is the length at the maximum extension in metres; l is the actual extension length in
45、 metres. Table 2 Length classes of adjustable telescopic aluminium props Length class Length at maximum extension lmax10 1,00 m maxl 1,49 m 15 1,50 m maxl 1,99 m 20 2,00 m maxl 2,49 m 25 2,50 m maxl 2,99 m 30 3,00 m maxl 3,49 m 35 3,50 m maxl 3,99 m 40 4,00 m maxl 4,49 m 45 4,50 m maxl 4,99 m 50 5,0
46、0 m maxl 5,49 m 55 5,50 m maxl 5,99 m 60 6,00 m maxl 6,49 m 65 6,50 m maxl 6,99 m 70 7,00 m maxl 7,50 m 6 Designations EXAMPLE EN 16031 R65/49 T1 M Designation of a prop in accordance with EN 16031, class: “R65”, with a minimum extended length: “49” dm, “T1” type 1 with threaded inner tube, “M” with
47、 an ongoing production inspection level M: EN 16031 R65/49 T1 M European Standard number block Load class, length class/minimum extended length Prop type 1 with threaded inner tube With an ongoing production inspection level BS EN 16031:2012EN 16031:2012 (E) 12 7 Materials Materials shall have a goo
48、d resistance and be protected against atmospheric corrosion. They shall be free of any impurities and defects which might affect their satisfactory use. Steels of deoxidation type FU (rimming steels) are not permitted. Materials should be selected from the relevant existing European and Internationa
49、l Standards and, whenever applicable, should be in accordance with the following standards: EN 12811-2:2004 (in particular Clause 6) and EN 1999-1-1 for aluminium. 8 Requirements 8.1 Tubes For the purposes of assessment, the method of making holes shall be stated on the relevant drawings. NOTE The preferred method of forming holes is by drilling. For aluminium profiled tubes, the minimum nominal wall thickness shall be at least 2 mm. For tubes for which it is possible to
