2022 California Standards for Accessible Design Guide (effective January 1, 2023)

11B-1009.5.2 Transfer space.

A transfer space of 60 inches (1524 mm) minimum by 60 inches (1524 mm) minimum with a slope not steeper than 1:48 shall be provided at the base of the transfer platform surface and shall be centered along a 24 inch (610 mm) minimum side of the transfer platform. The side of the transfer platform serving the transfer space shall be unobstructed.

FIGURE 11B-1009.5.2 CLEAR DECK SPACE AT TRANSFER PLATFORM