AS 4758.2:2015 pdf free.Lifejackets Part 2: Materials and components – Requirements and test methods.
6.1 CONSTRUCTION
Closures and adjusters, such as buckles and slide adjusters shall comply with the criteria specified in Table 6.1 when subjected to the tests specified in that table.
6.2 PERFORMANCE
6.2.1 Tensile strength
The assembly shall consist of the hardware component with two lengths of webbing 1 50 mm in length attached as they are for use.
A constant rate-of-extension tensile testing machine with a rate of extension of 300 ±10mm/s and jaws not less than the width of the webbing shall he used.
A tensile load shall be applied until breakage, disengagement. slipping in excess of 75 mm or a similar condition occurs.
The tensile load at failure shall he reported.
6.2.2 Strength/slippage
An assembly consisting of the hardware component with webbing attached as for use shall he subject to a tensile load tr 10 mm using either the fixed straight-length method or the loop assembly methods as follows:
(a) Fixed sfr1ighI-length method
Two lengths of webbing not less than 600 mm in length shall be used to make up the assembly as shown in Figure 6.1(a).
One end of the assembly shall be secured to a fixed point and a steady load shall be applied to the other.
(b) Loop assembly method
The assembly shall be made up with a single piece of webbing not less than 1200 mm in length as shown in Figure 6.1(b).
The assembly loop shall be supported vertically over a cylinder and a second cylinder shall provide the means for applying a steady load [see Figure 6.l(b)J.
6.2.3 Tab disengagement
The assembly shall consist of the hardware component with two lengths of webbing not less than 600 mm in length attached as for use.
One end of the assembly shall be secured to a rigid fixture and a mass of 2.25 kg shall be attached to the other end.
The mass shall be raised 300 mm above the attachment point and shall be released to apply a shock load to the assembly.AS 4758.2 pdf download.