The original Wooden Center, constructed in 1984, is a two-story building above two levels of below-grade parking (Parking Structure #4). In 1999, the Men's Gym Staging Building (MGSB) and Parking Structure (PS) #4 Expansion expanded the complex to the north with two levels of below-grade parking and two floors of recreational uses. In 2005, the Wooden West two-story addition increased recreation space on Level 1 and provided Student Services on Level 2. In 2011, the Wooden Yates Mezzanine Addition increased space within the existing gymnasium. The Wooden Center now totals 189,839 gsf (99,110 asf). The project will also enclose the exterior loggia, adding 2,600 gsf of programmable space. Due to the impact of seismic work at the roof level, a new roofing membrane will replace the existing roofing which is at the end of its useful life. The key structural deficiencies contributing to the seismic performance rating of VI that will be addressed in the seismic upgrade include: • Deficient Steel Braced Frames: Members and connections of existing braced frames throughout the building above Level 1 (street level) must be strengthened to provide adequate lateral capacity. • Deficient Connection at Transition of CMU Walls to Steel Braced Frames: Existing connections with J bolts cast-in-place in CMU walls do not provide adequate strength to transfer seismic forces from steel braced frames to CMU walls. These connections need to be strengthened to provide an adequate load path for seismic loading. • Lack of Seismic Resisting System: The floor and roof diaphragms near the south region of the building are supported on three sides. For proper seismic behavior, a new seismic resisting system (e.g., new braced frames) is required on the unsupported side. • Deficient Drag Connections: Drag connections throughout the building lack adequate strength to transfer seismic forces to the existing seismic resisting elements. These connections need to be strengthened to provide an adequate load path for seismic loading. • Deficient Collectors: A few collectors at the Men's Gym Staging Building lack the strength to properly deliver seismic forces to the existing concrete shear walls that need strengthening. • Deficient Roof Diaphragm: The existing roo`f structure, which consists of vermiculite fill over insulation board over metal deck, does not exhibit sufficient diaphragm shear capacity for seismic loading. Potential retrofit measures include installing a layer of FRCM (fabric-reinforced cementitious matrix) on top of the deficient areas of the roof diaphragm or adding horizontal roof trusses to help the existing roof diaphragms span between lateral resisting elements.
