Constitution Square

Located at First and M Streets, NE, in the vibrant NoMa neighborhood, Constitution Square is a 3.1 million-square-foot, multi-phased, urban mixed-use complex featuring multiple office, residential, hotel, and retail buildings. SK&A was selected to provide structural engineering services for the Class “A”office buildings, Three Constitution Square (OB3) and Four Constitution Square (OB4), as well as Residential Building Two (RB2), a 13-story apartment building.  SK&A also provided special inspection services for construction of a 12-story office building (OB3) over a two-level parking garage.  The construction of the building is a conventionally reinforced slab in the substructure and post-tensioned reinforced slabs in the superstructure levels above. 

Special inspection services were also provided for construction of a 13-story residential building (RB2) over a three-level below grade parking garage.  The substructure of the building (mat foundation, foundation walls, slabs, and columns) consists of conventionally reinforced concrete and the superstructure consists of post-tensioned reinforced concrete slabs above grade.