GSA Courthouse Management Group
Mechanical Lift Analysis
Same as 1B of ADA requirements,
but with a minimum side reach of 15 in.
ASME A18.1-1999 plus Addenda A18.1a-2000 and A18.1b-2001
Gates shall be self-closing and at least 42 in. high. (Most Stringent)
Gates shall be provided with a combination mechanical lock and electric
contact. The locking device shall allow the gate to be opened only if the
platform is within 2 in. of the landing. (Most Stringent)
The running clearance between the platform and landing shall be not less
than 3/8 in. or more than in. (Most Stringent)
A grab rail extending the full length of either side of the platform shall be
provided at a height of 34 in. (Most Stringent)
Lift equipment pits are not required and a ramp shall be provided between
the lowest lift level of the platform and the adjacent floor. (Retractable
ramps, mounted to the platform, are allowed.) (Most Stringent)
The inside net platform area shall not exceed 18 sq ft.
The rated load on the platform shall not be less than 450 lb, or more than
750 lb. (Most Stringent)
Platforms with an area greater than 15 sq ft shall have a rated
load of not less than 750 lb. (Most Stringent)
The lift shall be key operated from the upper and lower landings.
Deflection of the platform shall not exceed 3/8 in. vertically,
if it is symmetrically loaded. (Most Stringent)
Platforms shall align vertically with each landing, within a in. tolerance.
The lift shall be operated only by continuous pressure on the control
button. (Most Stringent)
HDR Architecture, Inc.