Potrero Substation Transmission Facility

San Francisco, California

Provided structural design for this new 16,000 sq. ft. transmission bus building at the Potrero substation in San Francisco, California. The building programming includes a cable basement, 230kV Gas-Insulated Switchgear (GIS) room, 115kV Gas-Insulated Switchgear (GIS) room, relay rooms, 5 ton crane, and battery room. The building structure consists of structural steel framing with 34 ft. tall pre-cast concrete walls, concrete floor, and concrete roof. The foundation consisted of a reinforced concrete mat slab on direct displacement columns used for soil stabilization. The equipment manufacturer specification required extremely tight levelness and flatness requirements for the concrete floor system.