ASME A90.1:2015 pdf free download – Safety Standard for Belt Manlifts
1.1 Scope
This Standard applies to the manufacture, installation, maintenance, inspection, and operation of manlifts. Manlifts covered by this scope consist of steps (plat- forms) and accompanying handholds 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, eleva- tors with enclosed platforms (Paternoster elevators), gravity lifts, or conveyors used only for conveying materials.
1.2 Purpose
The purpose of this Standard is to establish safety requirements for manlifts. It is intended for use as a standard reference for manlift safety requirements by manufacturers, architects, plant designers, installers, and consulting engineers, and for users of manlifts through voluntary application and for governmental authorities.
1.3 Application
(a) This Standard applies to manlifts used to carry only authorized personnel trained in their use. Manlifts shall not be available to the general public.
(b) Because of the difficulty in enforcing paras. 4.2 and 7.1(a), manlifts are not recommended for use on construction sites.
(c) One year after the date of issuance, all provisions of this Standard shall apply to both new and existing installations, except as noted in individual sections.
3 DEFINITIONS
belt-breaking strength: the amount of tensile load [pounds (newtons)] applied to a belt causing its fracture. belt travel: the distance between the centers of the top and bottom pulleys when the bottom pulley is at its highest position. debris deflector: a protective shield positioned to deflect falling objects away from the bottom pulley. elevator bolt: a flathead, countersunk elevator bolt as defined by ASME B18.5-1990, Table 9. factor of safety: the ratio of the tensile strength of the material to the allowable stress when a part is subjected to full-load operation. handhold (handgrip): a cup-shaped device securely attached to the belt, which can be grasped by the passen- ger to provide a means for maintaining balance.
manlift: a power-driven endless belt that moves in one direction only, and is provided with steps (platforms) and handholds for the transportation of personnel from floor to floor. rated speed: the speed of the belt at which the manlift is designed to run (refer to para. 5.4). safety stop device: any electrical or electromechanical device (such as a limit switch, photoelectric eye, or prox- imity probe) that shall cause the electric power to be removed from the driving machine motor and brake stopping the manlift. severe belt damage: the protective outer cover ofa belt that becomes cut, cracked, or separated, exposing damaged inner fabric, and such damage that extends across the full width of the belt or spans between adjacent bolt holes. A torn belt is also considered severe. split-rail safety stop: an electric limit switch operated mechanically by the rollers on the manlift steps. step (platform): a passenger-carrying unit. superficial belt cover damage: the protective outer cover of a belt that becomes scratched, cut, or cracked, exposingthe innerfabric. Suchdamage is notcontinuous across the full width of the belt. torn: a severance of any length or width that goes through the entire thickness of the belt.