Historical
BS EN 131-3:2007
Ladders. User instructions (British Standard)
This European Standard advises on the safe use of ladders covered by the scope of EN 131 1 and fulfilling the requirements of EN 131 1, EN 131 2 and, for single or multiple hinged-joint ladders, EN 131 4 used as standing or leaning ladders.
British Standards Institution [bsi]