Skyscraper Museum webinar. Mark Sarkisian is the structural and seismic engineering partner in SOM’s San Francisco office. He holds fourteen U.S. and international patents for high-performance seismic structural mechanisms and environmentally responsible structural systems. Mark will discuss the structural design of SOM’s Jin Mao Tower, which when completed in 1999 at 420 m / 1,380 ft. was first of the trio of supertalls in Shanghai’s Pudong business district. Its multiple functions, with offices on the lower floors and a luxury hotel and observation deck above, established the mixed-use typology that would characterize many Chinese supertalls in the next two decades. Mark will explain the innovative foundations and seismic design of Jin Mao and the concrete core and mega-column structural system that accommodated the dramatic central atrium that rises through the hotel stories.