2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)

TECHNICALLY INFEASIBLE.

[DSA-AC] An alteration of a building or a facility, that has little likelihood of being accomplished because the existing structural conditions require the removal or alteration of a load-bearing member that is an essential part of the structural frame, or because other existing physical or site constraints prohibit modification or addition of elements, spaces or features that are in full and strict compliance with the minimum requirements for new construction and which are necessary to provide accessibility.