Designed by Renzo Piano and Stantec, the replacement building features a 2.5 acre green roof and an extensive roof garden with shallow soil, rolling knolls, a sliding space frame skylight over the entry plaza, and a concrete roof-level observation platform. SGH consulted on the waterproofing design and reviewed the structural design for the undulating roof, comprising lightweight concrete on metal deck with a hot-fluid applied monolithic membrane and more than 100 openings.
SGH consulted on the roofing, waterproofing, and exterior wall systems for the new development. We provided recommendations to improve performance, helped develop details, and assisted with construction administration to compare ongoing construction with the design intent.
We also peer reviewed the structural design on behalf of the City of San Francisco. SGH reviewed the structural engineer’s complex analytical model and performed nonlinear dynamic analysis to demonstrate acceptable behavior, despite predicted foundation rocking under seismic loads.