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National Park Service Presidio at 105 Montgomery   1  Crosby Group performed a seismic evaluation and ultimately developed a strengthening scheme in accordance with the State Historical Building Code and Appendix A1 of the 2003 IEBC for this building consisting of timber roofs and floor system and unreinforced masonry bearing walls. Originally constructed in the 1890’s as Barracks for army personnel stationed in the Presidio, the building has suffered the effects of ensuing major Bay Area earthquakes and is currently unoccupied. The proposed upgrade consisted of the addition of shotcrete and glass fiber reinforcement at the interior of the perimeter URM walls, roof and floor diaphragm anchorage; some limited beam and collector strengthening and the insertion of steel moment frames at a few exterior porch locations. With these internal restorations the historical building’s appearance would be maintained along with its structural integrity. The estimated cost to perform this upgrade is $1.7 million. LOCATION: San Francisco, CA CONSTRUCTION COST: $1.7 Million COMPLETED: 2005 OWNER: U.S. National Park Service HIGHLIGHTS: Historic Structure Federal Experience FRP Composite Design Copyright © The Crosby Group. All Rights Reserved.