Adaptive Reuse and Renovation
IMEG provided structural engineering and design services for the renovation and adaptive reuse of the existing office building at 651 Gateway as a laboratory building facility that is a part of an amenitized campus, including cafes, restaurants, conferencing, fitness center, and 300-stall parking garage. The existing building is a 17-story steel-framed structure with a 33-ft tall parapet and no basement. The existing structure has a steel moment frame lateral system with pre-Northridge moment frame connections. The structural scope of work includes a complete re-skinning of the structure. A new 8,300-sf amenity expansion and 3,800-sf roof terrace addition at levels 2 and 3 respectively. A 3,500 sf outdoor amenity deck was also constructed at level 7. Several new floor voids were created to form multi-story openings, including a 1,200-sf void in the level 2 and 3 floors slabs, a 3,500-sf void in the level 8 floor slab peels the slab back from the exterior columns, an 800-sf mid-atrium void in levels 13 and 14, and a 2,200-sf upper atrium void in levels 16 and 17. An initial structural review and seismic analysis of the existing building’s structural systems was conducted to develop the necessary retrofit solutions.