Seismic analysis and rehabilitation of a 6-story and adjacent 7-story wood and steel framed building on a tight urban site at Jefferson & Oaks Streets in downtown Oakland.
This pair of mid-rise buildings was purchased by a nonprofit developer for use as low income housing.
At the Jefferson Building, new braced and moment frames were inserted full height. At the Oaks Building, existing steel moment frame columns and connections were strengthened to eliminate a soft-story condition and to mitigate pre-Northridge moment frame connections.
The steel frame connections were field bolted instead of welded to shorten on-site construction time and to minimize the hazards of field welding in a wood structure. A more costly upgrade was avoided by tailoring the seismic analysis to meet the Client’s Seismic Rehabilitation Objectives.