NF EN 1065 : 1999

      Foreword
      Introduction
1 Scope
2 Normative references
3 Definitions and symbols
4 Classification
5 Designation
6 Materials
      6.1 General
      6.2 Modification by cold working
      6.3 Corrosion protection
7 Configuration
      7.1 Tubes
      7.2 Welding
      7.3 Length adjustment device
      7.4 Permanent prevention against unintentional
             disengagement
      7.5 Endplates
      7.6 Props with fixed forkheads
      7.7 Anti hand trap
      7.8 Minimum extended length
      7.9 Overlapping length
      7.10 Data required from the manufacturer
8 Nominal characteristic strength
9 Verification
      9.1 General
      9.2 Verification of the actual characteristic
             strength by calculation
      9.3 Verification of the actual characteristic
             strength by testing
      9.4 Verification of the strength of adjustment
             device
      9.5 Verification of the prevention against
             unintentional disengagement
10 Test methods
      10.1 General
      10.2 Test method for the prop strength
      10.3 Test of a pin and its supports
      10.4 Test of the prevention against
             unintentional disengagement
11 Test report
12 Marking
Annex A (normative) Equations for the calculation of the
                    structural properties of tubes
Annex B (normative) Calculation of resistance for pin
                    connections
Annex C (normative) Statistical evaluation of data
Annex D (informative) Prototype assessment
Annex E (informative) Ongoing production inspection

Defines design requirements, materials and corrosion protection alternatives together with assessment procedures of both testing and calculations for open thread and covered thread adjustable telescopic steel props that are intended for use on construction sites (see Figure 1). Defines five classes of nominal characteristics strength for adjustable telescopic steels props with a series of maximum extended lengths, having different endplate configurations.