Developer/OwnerSafeway Stores, Inc.
ArchitectArchitectural Design Studios
ContractorUnlimited Construction Services, Inc.
A new, approximately 118,000 SF retail store facility including 59,000 SF of Safeway retail and outdoor dining space at the second floor, 6,600 SF of retail space and 52,400 SF of parking, circulation and access space at the ground floor.
The structure is an elevated podium format with parking on the ground level and the supermarket on the second level. This is the first of its kind in Hawaii and only one of two of its kind in the nation for Safeway.
The client had a very aggressive schedule and wanted to get the store completed and opened before the year-end holiday season. BASE helped accommodate the schedule by submitting an early foundation package so that the contractor could begin the site work while the superstructure was still being completed. BASE also provided special inspection and material testing services. We helped coordinate and resolve field issues between the design engineers and the contractor in a very timely manner. Ultimately, the contractor was able to finish a full six weeks earlier than the originally agreed upon, already aggressive, 10 month schedule.
The Science and Design of Structural Engineering
A primary challenge was the selection of an efficient structural system to accommodate the below-store parking required because of the very tight site. Important considerations included material selection (concrete or steel), coordination of column grids within the store and parking and choice of lateral load resisting system. The final structural design consisted of a cast-in-place concrete podium supporting structural steel columns with a metal deck and open-web bar joist roof. The concrete columns at the parking level where located on a 60 ft. x 27 ft. bay to efficiently accommodate the parking layout. Post-tensioned concrete beams were used in the 60 ft. direction and a 9 in. thick mildly reinforced slab in the 27 ft. direction. No post-tensioning was provided in the 27 ft. direction to more easily facilitate future modifications. The steel columns supporting the roof were located over the concrete columns and every other bay in the 27 ft. direction was eliminated, so that the bar joists span 54 ft. The lateral load-resisting system consists of concrete and masonry shear walls located at the stair and elevator cores.