Point Load Testing Standard

AS 1562.1 tests point load only in the path of traffic specified by the manufacturer; i.e., the pans of the profile, and across 2 ribs on narrow profiles.

The COP tests both in the pan (or two ribs) and a single rib, the latter being the less resistant to load.  This is to assess the profile strength when laypeople or careless roof traffic fail to adhere to manufacturers' recommendations.