Unloading and storing
Unloading of the packages on site should be carried out using appropriate hoists. Short panels may be unloaded using a fork lift truck but cranes are more suitable.
If special spreader bars with rubberized lifting slings are not available, edge protectors should be placed on the top faces of the packages or bracings should be used when working with normal ropes.
Packages, which are symmetrically suspended from the crane, should be swivelled and not driven to the place of installation in order to prevent shocks. The pallet should not be subject to major deflections. Distribute pallets according to the laying plan, if possible. When placing packages containing roof panels right onto the supporting structure, consult the site manager responsible for the building for suitable locations in which to place such packages.
If panels are to be individually transported up onto the roof, this should be done using a crane or an inclined hoist or manually. Panels should be protected from stormy weather by tying down with ropes. Do not stack more than two wooden pallets.
If the packages are not used immediately, make sure that the panels are stored on sufficiently large wooden supports with a slight inclination in order to allow any water that may have entered the package to drain out.
When packages are stored outdoors, they should be protected by breathable, watertight tarpaulins. Protect the packages from sun radiation, moisture and dirt, ideally using textile tarpaulins. To prevent condensation, ensure sufficient ventilation, open the tarpaulins at the front and protect them from stormy weather.
If stacks are unprotected, the presence of condensation or rain water between galvanized profiled panels may lead to white rust due to insufficient ventilation. 55% AlZn coatings may be affected by blackening. Slight white rust and blackening does not affect usability.
Under unfavourable conditions, the complete metallic coating may be removed and red rust may occur. Generally any such panels cannot be used any more.
Aluminium "as rolled" is critical in respect of on-site storage. The packages must be kept dry or the material must be installed immediately after delivery. Otherwise blackening, which cannot be removed, may occur.