Central to the redevelopment of John A Volpe National Transportation Systems Center in Kendall Square, 75 Broadway is a twenty-story biotech laboratory and mixed-use building. Softly faceted masses create the appearance of curvature and define the three-tiers of the building, forming 

terraces as they twist apart. The conversation between facet and curve continues in the custom profile terra cotta incorporated into the curtain wall. Glazed in a vivid green, each segment of terra cotta is scalloped in profile.

Beginning in early design, Heintges closely engaged with Elkus Manfredi to develop the custom unitized curtain wall enclosure. The ratios of opaque and vision areas are finely tuned to meet progressive energy targets. The opaque areas consist of terra cotta spandrel and full coverage 

shadow boxes, while the vision area utilizes triple-glazing with two low-E coatings. Thermal analysis provides methodologies for modifying the typical curtain wall system to bolster U-value performance at mechanical areas and achieve overall building targets. The building geometry is honed to ensure continuity of the curtain wall weather and air seals at transitions to terraces.

Heintges is providing building envelope consulting services during all phases of design and construction.