Couplers, spigot pins and baseplates for use in falsework and scaffolds - Part 1: Couplers for tubes. Requirements and test procedures1 Scope 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

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