The topping out of Sentinel Square-Phase I was celebrated today.  This downtown Washington, D.C. project is a Class A 12-story, 413,000 sf office building with three levels of below-grade parking, located at 90 K Street, NE in the revitalized NoMa (North of Massachusetts Avenue) corridor.  The project is registered with the USGBC, with the goal of obtaining LEED Silver certification.  Haynes Whaley worked with the project team to utilize numerous sustainable design elements and construction methods, including designing and specifying structural systems utilizing recycled materials.  The cast-in-place concrete structure was designed to meet the GSA security requirements for a Medium Level of Protection (MLOP) including provisions to resist progressive collapse.  Precast concrete, stainless steel metal panels and black granite are used on the building’s exterior.  An interesting note:  the 2-story lobby is adorned with gold marble from Israel.

Haynes Whaley was the engineer of record for the project which also included Developer: Trammell Crow Company; Architect: SmithGroup; and Contractor: Clark Construction.