San Francisco International Airport Terminal 2 Renovation

Our structural design for the new levels minimized the effects on the existing structures and allowed terminal operations, including TSA screening on the second floor, to continue throughout construction. Highlights include the following:

• Eliminating costly foundation work and minimizing column strengthening in the existing building by completing a performance-based foundation design, including rocking
• Seismically separating the new construction from the adjacent structure that encloses the terminal’s expansive lobby
• Designing the two new stories as a distributed steel moment frame structure with lightweight concrete slabs on metal deck to minimize mass and reduce gravity and seismic demands on the existing structure below
• Using a SidePlate SMF system, which involves creative connection detailing to achieve lighter beam and column member sizes, further reducing the potential demands on the existing structure
• Adding fiber-reinforced polymer to create new seismic force collectors and strengthen existing collectors to transfer the third-floor diaphragm forces into the concrete walls
• Boosting the gravity load carrying capacity of third-floor beams to support assembly loads by welding headed studs to the top flanges to enable composite action