1900 Reston Metro Plaza

1900 Reston Metro Plaza is a mixed-use building located in Reston, Virginia, now known as the Google building. Visible to the thousands of people who travel to the Dulles International Airport each day, this striking project consists of a 16-story office tower showcasing a unique lateral system consisting of a diagonalized, exposed concrete exoskeleton. The floors in the tower are constructed of two-way, concrete post-tensioned, 10-inch thick floor slabs with six-inch drop panels. The exoskeleton columns are constructed of 10,000 psi concrete strength and slope at an 11-degree angle from vertical to match the north and south building edges. There is a five-story, open-air plaza on the north side of the building which is supported by “tree columns,” which are three columns that start at the base and splay out like a tree to support the overhang above the plaza. The building also includes eight levels of below-grade parking, which is laterally supported by the existing below-grade parking structure that is immediately adjacent. Thornton Tomasetti provided structural engineering in collaboration with the owner Comstock Partners, Architect JAHN, and contractor Davis.

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Speakers:

Jennifer Greenawalt, P.E., S.E., LEED Green Associate is a senior project engineer at Thornton Tomasetti in Washington, D.C. Jen has been working as a structural engineer with the firm since graduating in 2015. Her experience includes analysis and design as well as renovations of concrete and steel structures in the Washington, D.C. metro area, including a multitude of commercial, government, residential, performing arts, and sports projects. She holds bachelor’s and master’s degrees in civil engineering with a focus in structures from The Pennsylvania State University. She is a licensed structural engineer in Illinois and a licensed professional engineer in Maryland and California.