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.
It is important that due care is taken at all stages from manufacture, transport, handling, storage, installation, and final fixing to ensure that performance specifications are not impaired by damage.
The maximum bundle, weight, and sizes of sheet that can be safely and satisfactorily handled on site should be ascertained before the consignment is sent. Lifting booms should be used when lifting long length cladding using taglines for guidance.
Sheets should not be dragged either from the pile or over eaves or purlins, and each sheet from the stack should be turned and lifted directly onto the roof.
Sheets longer than 3 m should be handled by two people and carried on edge to avoid buckling.