SEAONC/SEAOC 2019 EXCELLENCE IN STRUCTURAL ENGINEERING AWARDS APPLE PARK - VISITOR CENTER CLIENT: APPLE, INC. ARCHITECT: FOSTER + PARTNERS CONTRACTOR: TRUEBECK CONSTRUCTION STRUCTURAL ENGINEER : NABIH YOUSSEF ASSOCIATES Construction was recently completed on the Apple Park Visitor Center in Cupertino, California. The building is an impressive architectural and structural statement dominated by a large column free space with a significantly cantilevered and tapered roof system. The building is enclosed by a twenty foot tall perimeter glazing system and covered by a thin curved carbon fiber roof deck, resulting in an extremely transparent building. To achieve such a large column free space with dramatic cantilevers, while minimizing deflections in the glazing and carbon fiber roof systems, the building utilizes a novel post- tensioned steel roof structure that cantilevers nearly fifty feet from the core of the building.