For this five level, 330,000 square foot post-tensioned parking garage with 1,245 parking spaces, Miller Consulting Engineers, Inc. (MCE) provided preliminary foundation plans and cost estimates, structural frame cost comparisons, and a complete building information model for the 419,577 GSF structural system. Due to the location of the project (near the Willamette River) liquefiable soils created a challenge to optimize both the foundation system and structure in order to provide an economical structure. Several design options were evaluated in order to determine the structural system that would provide the best cost-benefit ratio for the project owner. A foundation system utilizing vibro-replacement stone columns was selected, and the structural system for the garage utilized cast-in-place post-tensioned framing. MCE also provided structural engineering services for the various site structures, including a cantilevered glass and steel canopy and numerous site retaining walls.
(Photographs courtesy of Ankrom Moisan Architects)
- Design of foundation system utilizing vibro-replacement stone columns
- Cast-in-place, post-tensioned concrete framing
- Provided cost-benefit ratio for the project owner
- Design utilized carbon fiber rebar