Designing a Steel-Truss Concrete-Plank Transfer Deck to Support Multiple Stories
DRPILLA was responsible for the design of the building’s structural system, specifically the foundation and the non-combustible first level which provides a column-free parking level accommodating 30 spaces. We designed and engineered a structural system comprised of a precast concrete plank transfer deck, which supports the three-story wood framed construction above. Our design transfers all point and line loads at the deck level. The plank system is supported by 4’–6” deep built up angle trusses which span the entire parking level. The trusses are spaced at 23 foot centers. The transfer deck “steps” and follows the grade of the building. The clearance of the structure had to accommodate emergency vehicles entering the below grade parking area as well as navigate the drainage system of the building beneath the parking slab.