The NZ Metal Roof and Wall Cladding Code of Practice is a comprehensive design & installation guide, and a recognised related document for Acceptable Solution E2/AS1 of the NZ Building Code.
Section 15 sets out the design and performance requirements for sheet roof and wall cladding systems specifically for New Zealand. While it is intended that only those people associated with testing would be concerned with the details of the test procedures it is of general and historical interest as to the reasoning behind the performance requirements.
For this reason a commentary is provided which follows each part.
Section 15 is divided into general requirements and specific methods of testing sheet roof and wall cladding for point load and also to determine their resistance to wind pressures. (UDL - uniformly distributed load).
These procedures apply to all metals and plastic sheeting however because of their different characteristics some of the performance criteria are different.