This standard BS EN 516:2006 Prefabricated accessories for roofing. Installations for roof access. Walkways, treads and steps is classified in these ICS categories:
91.060.20 Roofs
This document applies to installations for roof access (building products) permanently fixed to the load-bearing construction of pitched roofs, to stand or to walk on during inspection, maintenance and repair of facilities on the roof. It specifies essential dimensions, materials to be used, requirements with respect to the load-bearing capacity of the installation for roof access fastened to the roof construction including their fastening system, and the extent of testing. This document does not apply to permanently fixed ladders on pitched roofs.
