Prefabricated accessories for roofing. Permanently fixed roof ladders. Product specification and test methods not-eligible exclude air

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Prefabricated accessories for roofing. Permanently fixed roof ladders. Product specification and test methods not-eligible exclude airWhat is BS EN 12951 Specifications, and test methods of permanently fixed ladders about? BS EN 12951 is a European standard that discusses dimensions, specifications, and test methods of permanently fixed ladders. BS EN 12951 applies to permanently fixed ladders made of metal that 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