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

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

Status : Current, Draft for public comment   Published : October 2020

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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
StatusCurrent, Draft for public comment
Publication Date26 October 2020
Normative References(Required to achieve compliance to this standard)prEN 74-1:2020, EN ISO 898-1:2013, EN 17293, EN 12811-1:2003, EN 12811-3:2002, EN 12811-2:2004
Informative References(Provided for Information)EN 10204:2004, EN 1090-2, EN 12812, EN ISO 9001:2015
International RelationshipsprEN 74-2
Draft Expiry Date22 December 2020
DescriptorsSlip, Bend testing, Aluminium, Designations, Construction equipment, Mechanical testing, Couplers (scaffolding), Inspection, Scaffolds, Load capacity, Steels, Falsework, Temporary structures, Quality control, Force measurement, Design, Strength of materials, Failure (mechanical), Classification systems, Scaffolding fixing components, Scaffolding components
ICS91.220
Title in FrenchRaccords, goujons d’assemblages et semelles pour étaiement et échafaudages de service Partie 2:Raccords spéciaux - Exigences de performance et méthodes d’essai
Title in GermanKupplungen, Zentrierbolzen und Fußplatten für Arbeitsgerüste und Traggerüste Teil 2: Spezialkupplungen - Anforderungen und Prüfverfahren
CommitteeB/514
PublisherBSI
FormatA4
DeliveryYes
Pages43
File Size654 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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