DIN EN 12951:1997-09

This document applies to fixed ladders on pitched roofs which are permanently installed on the load-bearing construction of pitched roofs and which may be stepped or walked on for purposes of inspection, maintenance and repair of equipment installed above the roof surface. It specifies essential dimensions, materials to be used, requirements with respect to the load-bearing capacity, and the extent of testing. Walkways, single treads, single steps or not permanently fixed roof ladders are not included.