ASME A18.1:2005 pdf download.Safety Standard for Platform Lifts and Stairway Chairlifts.
2.1.3.5 The sides of the platform not used for entrance or exit shall be guarded by walls of smooth construction with no openings, other than those necessarv for the operation of the lift, to a height of at least 1100 mm (42 in.). Those openings necessary for operation shall re,ect a baIl 12 mm (0.5 in.) in diameter. A grab bar extending the full length of eithet side guard shall be provided at a height of 850 mm (34 in.) to 1 000 mm (38 in.).
2.1.3.6 The underside of the platform shall be guarded in accordance with the requirements of para.
2.1.3.6.1. 2.1.3.6.2. or 2.1.3.6.3.
2.1.3.6.1 The underside of the platform shall be equipped with a device which. if the platform is obstructed in its downward travel by a force not to exceed 70 N (15 lbf) applied anywhere on its underside, will actuate a minimum of two sensing devices which shall cause electric power to be removed from the driving machine motor arid brake, if provided, and cause the platform to stop its downward motion within 50mm (2 in.). The ctroke of the device shall riol be less than the stopping distance of the platform. The lift shall be permitted to operate away from the obstruction. Downward motion shall be permitted to resume when the obstruction is removed.
2.1.3.6.2 The underside of the platform shall be equipped ivith a bellows or similar device that shall not be permanently deformed when a force ci 550 N (125 lbf) is applied on any 100 mm (4 in.) by 100 mm (4 in.) area. Deflection of the bellows due to a force of 330 N (75 lbf) applied on any 100 mm (4 in.) by 100mm (4 in.) area shall riot exceed 75 mm (3 in.) or the distance to contact an internal moving component other than the bellows support mechanism, whichever is less. Deflection shall be measured with the platform at uppermost landing.
(a) The upper attachment point of the bellows shall be permitted to be inset (rum the outer edge of the platform provided that the exposed area of the underside of the platform is equipped with a device that conforms to para. 2.1.3.6.1.
2.1.3.6 The underside of the platform shall be guarded in accordance with the requirements of para.
2.1.3.6.1. 2.1.3.6.2. or 2.1.3.6.3.
2.1.3.6.1 The underside of the platform shall be equipped with a device which. if the platform is obstructed in its downward travel by a force not to exceed 70 N (15 lbf) applied anywhere on its underside, will actuate a minimum of two sensing devices which shall cause electric power to be removed from the driving machine motor arid brake, if provided, and cause the platform to stop its downward motion within 50mm (2 in.). The ctroke of the device shall riol be less than the stopping distance of the platform. The lift shall be permitted to operate away from the obstruction. Downward motion shall be permitted to resume when the obstruction is removed.
2.1.3.6.2 The underside of the platform shall be equipped ivith a bellows or similar device that shall not be permanently deformed when a force ci 550 N (125 lbf) is applied on any 100 mm (4 in.) by 100 mm (4 in.) area. Deflection of the bellows due to a force of 330 N (75 lbf) applied on any 100 mm (4 in.) by 100mm (4 in.) area shall riot exceed 75 mm (3 in.) or the distance to contact an internal moving component other than the bellows support mechanism, whichever is less. Deflection shall be measured with the platform at uppermost landing.
(a) The upper attachment point of the bellows shall be permitted to be inset (rum the outer edge of the platform provided that the exposed area of the underside of the platform is equipped with a device that conforms to para. 2.1.3.6.1.
