234 FRONT STREET, SAN FRANCISCO

This five-story, 35,000 sf seismic retrofit in downtown San Francisco had challenges created by drilling 90 foot deep micro piles through bay mud to support two, four story steel brace frames, while keeping a restaurant in the building open for business. Two levels of shotcrete walls were erected in three locations, and each floor diaphragm was secured to the new support frame. Three levels of tenant space were built for lease ready office use.