AS NZS 1576.2:2016 pdf free

AS NZS 1576.2:2016 pdf free.Scaffolding Part 2: Couplers and accessories
The following apply to tightening of couplers:
(a) For a screw-tightened coupler, a torque of 54 Nm shall be sufficient for the coupler to satisfy the requirements of Section 4.
(b) For a screw-tightened coupler to achieve a slip resistance performance greater than the requirements of Section 4，a higher tightening torque than 54 Nm may be specified, provided the maximum stress in the screwed component does not exceed 70% of the minimum yield stress of the material.
(c) The method of tightening the wedge shall enable the coupler to achieve its design performance in accordance with Section 4. In the absence of information on the method being provided by the supplier or manufacturer, the coupler shall be tightened by striking the wedge twice firmly with a 500 g hammer swung through a distance of between 300 mm and 320 mm.
Couplers shall be capable of being tightened to a minimum of 80 Nm around the tube without any part of the specified coupler or its components showing any sign of permanent distortion. After release of the torque and removal of the coupler, the coupler shall be in a serviceable condition.Where a tightening torque higher than 80 Nm is specified to achieve added slip resistance,the robustness requirement shall apply for a torque 50% above the higher specified tightening torque.
In addition to the requirements of Clauses 3.2.2 and 3.2.3, swivel couplers shall have a steel swivel pin not less than 200 mm2 in area with a minimum tensile strength of 380 MPa. The heads of the pin shall be well formed and free from any riveting defects. The swivelling faces shall be smooth and in contact. This requirement shall not prohibit a metal washer being interposed between the faces of the coupler. Where a metal washer is inserted, the coupler shall not be less efficient.
NOTE: Swivel couplers should not be used to transfer primary loads unless specified in the installation design.AS NZS 1576.2 pdf free download.