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  • BSI
    20/30424615 DC BS EN 74-2. Couplers, spigot pins and baseplates for use in falsework and scaffolds - Part 2. Special couplers. Requirements and test procedures
    Edition: 2020
    $42.22
    / user per year

Description of 20/30424615 DC 2020

EN 74‑2 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.



Standard Number20/30424615 DC
TitleBS EN 74-2. Couplers, spigot pins and baseplates for use in falsework and scaffolds - Part 2. Special couplers. Requirements and test procedures
StatusDefinitive
Publication Date2020-10-26
Identical National Standard OfprEN 74-2
DescriptorsConstruction equipment, Aluminium, Couplers (scaffolding), Mechanical testing, Bend testing, Scaffolds, Classification systems, Quality control, Temporary structures, Inspection, Scaffolding components, Falsework, Failure (mechanical), Steels, Slip, Strength of materials, Designations, Force measurement, Load capacity, Scaffolding fixing components, Design
ICS91.220 Construction equipment
CommitteeB/514
PublisherBSI
Pages43

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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