How much weight must a vehicle lift be able to accommodate?

Under Department of Transportation (DOT) Americans with Disabilities Act (ADA) regulations at 49 C.F.R. Section 38.23(b)(1), wheelchair lifts must accommodate a design load of at least 600 lbs., with a safety factor of at least six (3,600 lbs.) for working parts, such as belts, pulleys, and shafts that can be expected to wear, and a safety factor of at least three (1,800 lbs.) for nonworking parts, based on the ultimate strength of the material. For vehicles equipped with ramps, the design load must be at least 600 lbs. for ramps in excess of 30 inches in length, with a safety factor of at least three (1,800 lbs.); ramps less than 30 inches in length are required to have a design load of at least 300 lbs. Transit agencies are not prevented from acquiring vehicles and equipment with a higher design load but are not required to accommodate mobility devices that exceed the capacities of their lifts or ramps.