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.
Metal cladding should be packed and handled with care to ensure that damage does not occur during transportation. The packs of metal cladding should be clearly labeled, placed on the deck of a truck without overhanging, securely strapped to the deck, and protected from wet weather.
The load should also be well supported to stop any flexing during transport which can cause fretting, and no other cargo should be stacked on top of any metal cladding.
Slings or strops should be nylon with leather sleeves to prevent fraying or cutting and damaged slings. Single slings and chains should not be used to lift packs of cladding. Slings and booms should be approved or certified as safe and suitable for their purpose.
Spreader bars should also be used with slings to prevent them causing crushing damage to the edges of sheet packs. Lifting booms may be available from roof cladding manufacturers for longer lengths than 15 m.
The Regional Traffic and Land Transport Authority must approve transport of cladding in lengths greater than 25 m, and the Design Engineer should seek this approval at the building design stage.
Where transport is expected to be over long distances or rough terrain, pre-coated sheets stacked in bundles should either have a strippable film or be interleaved with paper or plastic to prevent fretting. Bundles should be supported on dunnage which lines up vertically, and top and tie downs should be provided with edge protection.
Short sheets should be packed on top of longer ones which should have end and edge protection to avoid cut end damage to the sheets below them.