UDL Load Testing Standard

AS 1562.1 defines serviceability failure as a level of deflection under load.

In the COP standard, deflection testing is normative for wall cladding and informative for roof cladding.  Additionally, the COP standard defines serviceability failure of pierce fastened roofing as permanent deformation, when permanent distortion or splitting occurs around the fastener head.  The load at which permanent distortion occurs around the fastener head is defined as serviceability failure and the roof can still resist greater loads, but the damage would affect weather tightness.

Deflection Around a Fastener Under Load

Deflection around fastener head under load

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Permanent Deformation Around a Fastener

Permanent deformation around fastener

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The COP standard does not require cyclic testing, but this can be done if required for other legislations and cyclonic areas.