scope:

This standard applies to the construction, maintenance, inspection, and operation of manlifts in relation to accident hazurds. Man lifts covered by this scope consist of platforms or brackets and accompanying hand holds mounted on, or attached to an endless belt, operating vertically in one direction only and being supported by, and driven through pulleys, at the top and bottom. These manlifts are intended for conveyance of persons only. It is not intended that this scope cover moving stairways, elevators with enclosed platforms( "Patemoster" e1evators), gravity lifts, nor conveyors used only for conveyors, material.

Purpose, lnterprefofion ond Exceptions.

The purpose of this standard is to provide reasonable sufety for life and limb. In case of practicual difficulty or unnecessary hardship the enforcing authority may grant exceptions from the literal requirements or permit the use of other devices or methods, but only when it is clearly evident that reasonable safety is thereby secured.

NOTE: It is suggested that in cases where exceptions are asked for. The enforcing authority consult with the USA standard committee A 90, safety standard for wonder. Care of the USA standards institute 10 east 40th street, new York, new York 10010 or care of the secretary of the committee .the American society of mechanical engineers. united engineering center. job east 47th street , new York, new York 10017.