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BSI 20/30424615 DC:2020 Edition

BSI 20/30424615 DC:2020 Edition

$13.70

BS EN 74-2. Couplers, spigot pins and baseplates for use in falsework and scaffolds – Part 2. Special couplers. Requirements and test procedures

Published By Publication Date Number of Pages
BSI 2020 43
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EN 74ā€‘2 specifies:

  • materials;

  • design requirements;

  • specified values for resistances and stiffnesses which a coupler has to achieve under test;

  • test procedures and assessment;

for the following special couplers:

  • screw or wedge half couplers, sleeve couplers with shear studs, right angle reduction couplers and swivel reduction couplers.

It gives recommendations for on-going production control.

These couplers are for use principally in temporary works. Each coupler is able to be fixed to at least one side to one 48,3 mm diameter steel or aluminium tube. For the other side of reduction couplers, this standard specifies requirements for the diameter and wall thickness of tubes.

For testing, screw couplers are tightened with a torque of 50 Nm and wedge couplers are tightened with a 500 g hammer until the jarring blow.

Other special half couplers such as half couplers attached by riveting, used mainly for members of prefabricated scaffolds, are outside the scope of this document.

NOTE

Information on design using special couplers is given in Annex B.

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