Fanno Creek Place

Tigard, OR

Two inviting, three-story, Class A office buildings were built using a creative structural design approach.  Building A and Building B consist of approximately 74,500 and 55,500 square feet, respectively.

Concrete tilt-up was used for both the lateral and gravity support at the perimeter of the building.  Gravity loads are resisted by exterior concrete tilt-up bearing walls as well as one interior concrete wall occurring in each building.  The design of these walls utilizes more conventional concrete design methods rather than slender wall provisions.  Lateral loads are resisted by the same concrete wall panels acting as shear walls.  Diaphragms at the second, third, and roof levels transfer lateral load to these walls.  Design of the lateral force resisting system is controlled by seismic loads and distribution of forces to lateral elements is based on the relative rigidities of the panels.  The roof structure utilizes metal decking supported by open-web steel joists and girders.  Concrete support pads are provided for roof mounted mechanical equipment.  The main floor structure is a concrete slab-on-grade. Upper floors are framed with a combination of open-web steel joists and girders, and wide-flange beams and girders supporting a concrete slab over metal deck. Interior building columns are tube steel.  The foundation utilizes conventional concrete spread footings.