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.
Construction loads on a building include the wind load on a partially clad or braced roof or building. Depending on the method and sequence of construction, it can be greater than the load on a completed building.
Other forces that can should be kept in mind during installation are:
- The intensity of internal wind pressures due to a temporary absence of ceilings, walls and glazing.
- Storage of roof cladding on the structure. Bundles of roof cladding should be placed so they do not cause overstress in purlins.
- Any scaffolding above an existing roof must be designed to avoid damage to the roof structure or coatings.