Birmingham Federal Bureau of Investigation Field Office

The project consists of a three-story, 90,000-square-foot office building over a 1,200-square-foot, 133 vehicle below-grade parking garage. The below-grade parking is designed to expand to hold 170 cars and to accommodate a future vertical expansion for an additional three-story office building and a singlestory radio maintenance facility. When it opened, developers planned for the new field office to anchor a planned six- to eight-block urban business park near the Birmingham-Jefferson Convention Complex

Walter P Moore's structural system consists of a cast-in-place, mild reinforced, concrete frame including the slab, beams, girders, and columns. The wind and seismic lateral force resisting system consists of concrete moment-frames running in both primary axis of the building. This system is integral with the gravity load frame. The foundation system consists of cast-in-place concrete piers bearing on limestone bedrock.

Progressive collapse is prevented by use of the mild reinforced concrete frame. Two-way frame action along column lines allows for the loss of an interior column, limiting damage to bays adjacent to that column. The system also allows for the failure of an exterior column without damage to adjacent bays. Since the building sits above the parking garage, the garage level columns and each level of building columns were analyzed for failure.