This stainless steel, linear drain effectively prevents water from cascading floor to floor during a fire emergency. The ADA compliant, heel proof drain and grate is intended for use in front of elevators, in elevator lobbies, stairways, and similar applications to receive and drain water with flow rates up to 100 GPM. At 1 3/4" deep, it does not disturb post-tension slabs. This drain complies with California building code 403.6.1, 403.6.2, 3007.4, 3008.4, San Francisco Fire Code, Section 511.1.4, and meets IBC Code 3007.