This European Standard specifies, for right angle couplers, swivel couplers, sleeve couplers and parallel couplers working by friction:materials;design requirements;strength classes with different structural parameters including values for resistance and stiffness; test procedures;assessment;and gives recommendations for ongoing production control.For testing, screw couplers are tightened to a torque of 50 Nm and wedge couplers are tightened with a 500 g hammer until the jarring blow.
EN 74-1:2005 history
2005EN 74-1:2005 Couplers, spigot pins and baseplates for use in falsework and scaffolds - Part 1: Couplers for tubes - Requirements and test procedures