Total renovation of an existing steel frame 12-story vacant office building with basement parking level and mechanical penthouse level. The total building area is approximately 550,000 square feet with floor infills at the first and second levels and the addition of two building floors. The project includes a voluntary seismic upgrade; new base building cores including new restrooms and elevators at all levels; and removal and replacement of the exterior precast concrete façade with a new high-performance glazed curtain wall system. Olson Steel handled all seismic steel upgrades, new structural steel enhancements and misc. metals throughout the entire building, including all new stairwells.