The Annual Awards Banquet gives us an opportunity to recognize and celebrate local excellence in projects, engineers, and students who have contributed to our profession and our community. Recognized parties include ASCE-NCS Outstanding Civil Engineering Project, Sustainability Committee’s Award Winning Project, Meritorious Service and Community Service Award winners, NCS Student Scholarship Award recipients, Outstanding Graduating Seniors from local civil engineering universities, and members of the NCS who have achieved Life Member or Distinguished Member status during the past year.
The finalists for the NCS 2015 Outstanding Civil Engineering Project are the Quadrangle Development Corporation’s Marriott Marquis Convention Center Hotel in Washington, DC, and Macerich’s Tysons Corner Center – Office Tower and Residential, Phase I in McLean, VA.
The Marriott Marquis is the first project in Washington, DC, to utilize top-down construction, a method selected due to local zoning height requirements coupled with the need to provide the square footage the market needed. This resulted in the building going 100 feet underground. Because the building perimeter was set directly on the property line, use of this method made for a very challenging project. Constructing the building foundations, excavating, and removing the soil, placing the structural slab system and repeating for each floor from the street elevation to the lowest level demanded the highest level of focus and planning. The innovative use of structural steel wide flange members and plates as reinforcement for the concrete slabs below grade allowed for seven stories of construction below grade, and the deepest excavation in Washington, DC.
Tysons Corner Center is an outstanding example of the principles of Live, Work, and Play that is transforming Tysons Corner into a true urban community with a direct link to Metro’s new Silver Line. Along the main facade of the office tower is a glass cable wall system, one of the largest of its type in the country and the first in the DC metro area. Vertical tensioned cables anchored by post-tensioned beams at the street level and second floor support the 52-foothigh unitized glass wall and custom extrusions uniquely designed for this project. A stainless steel portal incorporated within the glass cable wall provides access to the lobby. Also located along the main facade are eight 56-foottall exposed architectural concrete columns with a remarkably smooth finish. Each column contains almost three full truckloads of concrete.