I.S. EN 74:1989

1 Object and field of application
2 References
3 Definitions
   3.1 Coupler
   3.2 Right angle coupler (RA)
   3.3 Swivel coupler (SW)
   3.4 Parallel coupler (PA)
   3.5 Sleeve coupler (SF of SS)
   3.6 Loose spigot (LS)
   3.7 Base-plate (BP)
4 Symbols
   4.1 Measured values
   4.2 Statistical values
5 Materials and design
   5.1 Materials
   5.2 Design
   5.3 Data required from the manufacturer for assessment
        purposes
6 Requirements
   6.1 Design requirements
   6.2 Required characteristics for couplers under load
   6.3 Requirements in the case of design alteration
7 Sampling for prototype tests
8 Assessment methods
   8.1 Assessment without statistical analysis
   8.2 Assessment with statistical analysis
9 Load tests for prototype couplers
   9.1 General
   9.2 Testing of behaviour under load of right angle couplers
   9.3 Testing of behaviour under load of swivel couplers
   9.4 Determination of the ultimate load for right angle and
        swivel couplers
   9.5 Testing of the torsional rigidity of right angle couplers
   9.6 Tensile tests on friction type sleeve couplers
   9.7 Bending load capacity testing of class B sleeve couplers
   9.8 Tensile testing of sleeve couplers with shear pins
   9.9 Testing of behaviour under load of parallel couplers
   9.10 Determination of the ultimate load for parallel couplers
10 Test report and certificates
   10.1 Test report
   10.2 Certificates
11 Designation
12 Marking
Figures
Tables

Specifies the requirements for materials and design, and test procedures and methods, for couplers, loose spigots and baseplates used for connecting steel tubes of 48.3 mm outside diameter and of at least 3.2 mm nominal wall thickness at a minimum in the construction of working scaffolds and falsework required for the construction, maintenance, repair and demolition of buildings and structures.