A stepped concrete slab assembly bears on a concrete basement wall and shoring wall, with a layer of sand and compacted soil beneath concrete pavers. A future gas pipe by PG&E for tenant improvement service is routed through the assembly maintaining a two-foot-eight-inch minimum clearance. The upper transition meets a curtain wall metal panel system above a concrete base adjacent to Harrison Street. Datum elevations reference Project Zero and Level 1A West Top of Slab at minus two feet five and one-half inches.
PROJECT ZERO 0" R5 A.1 A LEVEL 1A - WEST - TOS -2' - 5 1/2" 2' - 0" 2' - 1 1/2" 8" 2'-8" MIN. CLEAR 2" 2' - 6 1/2" SAND CONCRETE PAVER FUTURE: GAS PIPE BY PG&E FOR TI SERVICE CONCRETE BASEMENT WALL COMPACTED SOIL CURTAIN WALL METAL PANEL SHORING WALL, NIC WATER TANK HARRISON STREET
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