SIST EN 16031:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Baustützen aus Aluminium mit Ausziehvorrichtung - Produktfestlegungen, Bemessung und Nachweis durch Berechnung und VersucheEtais télescopiques réglables en aluminium - Spécifications du produit, conception et évaluation par calculs et essaisAdjustable telescopic aluminium props - Product specifications, design and assessment by calculation and tests91.220Gradbena opremaConstruction equipment77.150.10Aluminijski izdelkiAluminium productsICS:Ta slovenski standard je istoveten z:EN 16031:2012SIST EN 16031:2012en,fr,de01-september-2012SIST EN 16031:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16031
May 2012 ICS 91.220 English Version
Adjustable telescopic aluminium props - Product specifications, design and assessment by calculation and tests
Etais télescopiques réglables en aluminium - Spécifications du produit, conception et évaluation par calculs et essais
Baustützen aus Aluminium mit Ausziehvorrichtung - Produktfestlegungen, Bemessung und Nachweis durch 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 and 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 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, Germany, 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
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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: ESIST EN 16031:2012

Ongoing production control . 34Bibliography . 36
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 hole 6 connection holes
7 pin hole Figure 2 — Example of adjustable telescopic aluminium prop (type 2) SIST EN 16031:2012

N/mm2 f0,HAZ characteristic value of proof strength at the transitions point between prop and base plate determined by taking the heat effected zone into account N/mm2 l actual extension length of the prop m maxl length of a prop at maximum extension m 0l overlapping 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,k characteristic compression resistance kN iC,N ideal buckling 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
5 Classification Adjustable telescopic aluminium props shall be classified according to its specified value for nominal characteristic strength Ry,k given in Table 1 (load classes) and its maximal extension length maxlgiven in Table 2 (length classes). Table 1 — Load classes of adjustable telescopic aluminium props Load class Specified value for nominal characteristic strength Ry,k A kN0,440,512max≤⋅ll B kN0,510,682max≤⋅ll C kN5,590,1022max≤⋅ll D 34,0 kN E 51,0 kN R 66,0 kN S 82,5 kN T 99,0 kN U 115,5 kN V 132,0 kN W 148,5 kN
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 an ongoing production inspection level M:
EN16031R65/49T1 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
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 International 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 attach EN 74-1 and EN 74-2 couplers see EN 12811-1. 8.2 Welding The welding shall be carried out in accordance with execution class 2 (EXC 2) of EN 1090-3:2008. 8.3 Length adjustment device A prop shall be provided with a length adjustment device to modify the length from the minimum to the maximum extension. The adjustment device shall be one of two types: 1) a threaded collar connected to the outer tube with a threaded inner tube (type 1) (see Figure 1); or 2) a pin inserted into holes in the inner tube and a threaded collar connected to the thread in the outer tube (type 2) (see Figure 2). 8.4 Permanent prevention against unintentional disengagement The inner and outer parts of a prop shall be prevented from being permanently separated except by intentional action. One of the following methods shall by applied:  safety method 1: permanent locking connection (see Figure 3a); NOTE Safety method 1 is usually used for prop type 2.  safety method 2: an automatic safety device and an additional permanent locking connection (see Figure 3b);  safety method 3: two independent automatic safety devices arranged on the circumference not opposed each other (see Figure 3c);  safety method 4: an automatic safety device locked by an additional automatic permanent safety device (see Figure 3d). SIST EN 16031:2012

8.5 Anti hand trap For prop type 2, when the prop is fully closed without the pin inserted, there shall remain at least 100 mm clearance between the endmost part of the outer tube and the inside of the endplate. 8.6 Overlapping length There shall be an overlapping length between the outer and inner tube, l0, of at least 300 mm when the prop is fully open. SIST EN 16031:2012

Profiled endplates shall have a spring stiffness and a bending resistance at least equal to that of plain endplates. At corners which would otherwise be sharp, the radius shall be at least 5 mm. 9 Verification 9.1 General The properties of a prop shall be verified following the steps in Table 3. The actual characteristic strength acty,R of a prop shall be verified both with the outer tube at the bottom and with the inner tube at the bottom. The actual characteristic strength of a prop acty,R shall be verified at maximum extension for the classes A, B or C in the fully closed extension and also in the most unfavourable extension in between. The most unfavourable extension is the length with the smallest quotient acty,R/ky,R. For all extended lengths, the actual characteristic strength acty,R of a prop shall be at least equal to the nominal characteristic strength Ry,k specified in Table 1. Table 3 — Verification steps Step Property Verification method 1 Actual characteristic strength acty,R Determined by calculation supported by detail tests in accor-dance to 10.2 and confirmed by tests in accordance with 10.4 2 Characteristic strength of length adjustment device Determined by tests in accordance with 9.3 3 Prevention against unintentional disengagement Tests in accordance with 10.3
The global analysis to determine the internal forces and moments shall use elastic analysis design principles, assuming that the behaviour of the material is linear at all stress levels. The resistances of cross sections may be calculated by using plastic stress distributions. For the global analysis, the second order theory shall be used, taking into account the influence of the deformations of the structure on the internal forces and moments. The values for resistance in compression, bending moment, stiffness and eccentricities at the base shall be defined or calculated or determined by tests in accordance with 10.2 to support the analysis model chosen. SIST EN 16031:2012
...