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.
A visual inspection of the packs of roof or wall cladding should be made to check for damage before lifting the bundles off the transport vehicle. Insufficient dunnage under and between packs can cause permanent indentations of sheet surfaces.
Upon delivery, a check should be made that the correct quantity of material has been delivered and an inspection made for any strapping damage.
An inspection should be made where overtightening of bundle straps or load tension straps may have deformed the edges of the sheets. N.B. a 50 mm x 50 mm timber batten at the top of the bundle used in conjunction with the strapping system can avoid such damage.
When unpacking sheets they should be inspected for coating damage that may have occurred during transport due to coating fretting or pick-off.