The Spectrum, a 570,000 sf mixed-use facility comprised of two seven-story towers connected in an “L” shaped footprint, is located in the heart of downtown Falls Church, Virginia. The towers are comprised of 189 luxury residential units and 32,000 sf of street-level retail space, including a restaurant.
The project includes three partial levels of above-grade and two levels of below-grade parking totaling 233,000 sf. Amenities include a lounge, media room, conference room, fitness center and 13,000 sf of amenity deck space.
Two separate wood-framed office structures total 42,000 sf. The below-grade and at-grade structural system for The Spectrum is a conventional cast-in-place concrete flat slab system. The above-grade system is a post-tensioned cast-in-place concrete flat plate system.
Cardno structural engineers designed nine interconnecting long-span post-tensioned transfer girders at the second floor “bridge” to support twelve columns above and provide open space below.