Located along Metro’s new Silver Line, the Reston Station Building 4 project is a mixed-use, transit oriented 20-story building with 450 residential units and 720 parking spaces built over a new WMATA transit garage. The project includes plaza level retail spaces, an outdoor amenity plaza and clubhouse on the 10th floor, amenity spaces on the roof, and a roof-top swimming pool. The superstructure employs a combination of post-tensioned concrete flat plates and conventionally reinforced concrete flat slabs, and a large transfer structure at the bottom of the residential parking levels to accommodate bus access to the Metro areas below.
Because the new building was slated to be built directly above a massive transit garage designed by another team, careful collaboration with other engineers and architects was required to ensure the building structure properly married the garage structure.
Structura worked very closely with the transit garage team to develop a massive tension ring transfer structure over the Metro bus lanes and used a strut and tie model for another transfer girder over retail space. The use of Building Information Modeling (BIM) technology assisted the entire team with coordinating information to properly address and solve problems.
The TakeawayStructura’s resulting design successfully marries the new superstructure with the garage structure below, a significant accomplishment for all parties involved.