ASME A18.1:2020 pdf free download

ASME A18.1:2020 pdf free download.Safety Standard for Platform Lifts and Stairway Chairlifts.
(c) Each retractable arm shall be mechanically locked and monitored by an electric contact, which shall stop the movement ofthe platform withIn 50mm (2 In.) of travel away from any landing IF the arm is not In Its locked guarding position. Means shall be provided to manually unlock the retractable arm(s) for emergency evacuation purposes. The unlocking mechanism shall not be readily accessible to the passenger.
(d) Control shall be by means of a continuous-pressure device. The closing speed shall not exceed 0.3 rn/s (1 (1/ sec) as measured at the fastest point. The force necessary to prevent closing of the arm(s) shall not exceed 140 N (30 lbf) as measured at the midpoint across the arm at the boarding end of the platform. The arm(s) may operate in the direction away from an obstruction.
(e) A retractable ramp shall be provided in conformance with 2.1.8.2.
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 necessary ror the operation of the lift. toa height of at least 1 100 mm (42 in.). Those openings necessary for operation shall relect a ball 12 mm (0.5 in.) in diameter. A grab bar extending the full length of either side guard shall be provided at a height of 850 mm (34 In.) to 1000 mm (38 in.).
The runningdearance between the platform enclosure walls and the machine housing or any other rigid surface shall be not less than 50mm (2 In.). Where an obstruction or surface less than 1100 mm (42 in.) above the top landing other than the machine housing is wIthin 300 mm (12 in.) of the platform enclosure walls and presents a pinching, shearing, or crushing hazard, a smooth continuous surface shall be provided extending from the lower landingto a height o not less than 1100mm (42 in.) above the top landing. Where an obstruction or surface is between 1100 mm (42 in.) and 2000 mm (80 in.) above the top landing, a smooth continuous surface shall be provided extending from the lower landing to a height of not less than 75 mm (3 in.) above the obstruc• hon.
2.1.3.6 The underside of the platform shall be guarded In accordance with the requirements of
2.1.3.6.1. 2.1.3.6.2. or 2.1.3.63.
2.1.3.6.1 The underside of the platform shall be equipped with a devwe that, if the platform is obstructed anywhere on its tinderside in its downward travel, shall cause electric power to be removed from the driving- machine motor and brake, if provided. and cause the pLatform to stop its downward motion within 50 mm (2 in.). The stroke of the device shall be not less than the stopping distance of the platform. The force required to operate the device shall not exceed 70 N (15 lbf.