This definition appears very rarely
Barrie Weatherall, Chairman of the Ladder Systems Manufacturers Association (LaSMA), said: "This guidance is fully supported by the ladder equipment manufacturers' trade associations - LaSMA, the British Association of Ladder Safety Equipment Manufacturers (BALSEM), the British Ladder Manufacturers Association (BLMA) and the Ladder Stabilisers Manufacturers Association. These associations and others were involved in the development of this guidance.