An American National Standard. The American Society of Mechanical Engineers (ASME). Revision of ASME A18.1-2005. Date of Issuance: August 28, 2008. 76p. This safety Standard covers the design, construction, installation, operation, inspection, testing, maintenance, and repair of inclined stairway chairlifts and inclined and vertical platform lifts intended for transportation of a mobility impaired person only. The device shall have a limited vertical travel, operating speed, and platform area. Operation shall be under continuous control of the user / attendant. The device shall not penetrate more than one floor. A full passenger enclosure on the platform shall be prohibited.