COP:site-practice; roof-loading

12.5 Roof Loading 

Bundles or packs of roof cladding must remain banded when being lifted by a crane.
They must be placed adjacent to the portal frame and not mid-span on the purlins. Bundles must be placed so that their weight is spread over the entire area of the roof and should be positioned with the laps in the direction of laying.
Workers receiving a bundle of roof cladding on the roof must have sufficient mobility to avoid the load, and use tag lines to control the swinging of the load while it is out of reach.
Packs must be securely fixed to the structure, and part-packs must be re-fixed at the end of every day. It is the responsibility of the roofing contractor to avoid damaging the roof sheeting during its installation and fixing.