The triangles comprising the diagrid are prefabricated panels, manufactured by the Cives Steel Company at two plants in New York and Virginia. Each of the triangles are tall. The diagonal beams are typically long by wide. The columns are bolted, rather than welded, to each other at the nodes. The diagrid required of structural steel, twenty percent less than what would have normally been required for a building of similar size. More than ninety percent of the steel in the diagrid is recycled. The exterior curtain wall was constructed by Permasteelisa, which mounted 3,200 glass panels on the facade. The panels are typically tall by wide, although 625 of the panels were built to a custom specification.