The Potomac School New Athletic Center is a recreational building comprised of squash courts, a large multi-use gymnasium, elevated running tracks, and fitness/conditioning rooms. Hardesty Concrete’s scope included over 4,500-cy consisting of SOG, foundation/retaining walls, and framed decks. Some challenges for this project included radiused cantilevered slabs framed on mudsills, installing and placing an acoustical jack-slab system, framing and pouring 24-ft tall walls/decks, and placing over 22,000 sq-ft of SOG with very stringent FF/FL requirements.