Proj Overview. Construction Manager: Gilbane, Sacramento, Calif. The optimized facade responds to environmental conditions on each face, balancing solar gain, daylight, and views. The white precast concrete panels were preglazed and span from floor to floor. Precast concrete installation took 4 months. The project was delivered under the progressive design-build model, shortening the overall project delivery schedule by 18 months. Share this Project. When the annex is reopened, O Street will be used as offices for legislative and executive employees.
The design for the story structure reimagines the traditional solid central core and splits the building facade from north to south, creating a vibrant and verdant central opening.
The pedestrian-scaled, transparent base of the building features two levels of publicly oriented space, a double-height main lobby, sun-lit waiting areas, and a suite of public hearing rooms. At the center of the building, interconnecting stairs serve as zones for social interaction and roof terraces provide views of the surrounding city and the State Capitol.
Informed by a life-cycle cost analysis, the project team selected precast concrete as a cost-effective, modular building system. The precast concrete panels are white with a medium-sandblasted finish. Most of the panels are 13 ft wide and 30 ft long and span from floor to floor.
The metal tracks used to attach the vertical sunshades are a unique part of the precast concrete facade. Almost no direct solar load reaches the glazing, resulting in greater clarity of views and deeper daylight penetration, which supports a pleasant and healthy workplace environment. After breaking ground in , the team had to cope with recurring air-quality issues from nearby wildfires, labor and supply shortages, and the impact of COVID pandemic. The precast concrete panels were installed quickly as part of a progressive design-build model, reducing the overall project delivery schedule by 18 months.
