451D Infrastructure Improvements Phase 1 & 2

This project included design-assist and construction services to complete infrastructure improvements to an existing nine-story, 451,000-square-foot facility. The work converted an occupied office building into laboratory space. Phase one included two rooftop MUAs and two rooftop EAHU systems, energy recovery systems, ductwork distribution, 4,000 amp distributed electrical service, standby emergency power systems, structural improvements, gas risers, PH systems, HHW plant and risers and a chemical storage unit. When the required mechanical shaft needed to serve the building was designed to take up significant valuable space within the building, Sterling suggested an alternative solution. As a result, the plan was adjusted to run the systems down the exterior of the building, including the massive 50”x60” ductwork that required supportive structural steel members.

Phase two included a 500-ton chiller, two roof top EAHUs, five interior MAUs, energy recovery systems, ductwork distribution, 2000 amp distributed electrical service, standby emergency power systems, structural improvements, PH systems, HHW plant and risers. The roof didn’t have space for the new air handlers, requiring the units to be mounted to the floors. To get the units into the building, the team removed the building’s facade and, with precise rigging and coordination, slid the 53’x9’x10’ units into the building before restoring the façade. Completed within a fully occupied environment, Sterling coordinated multiple phases and shutdowns to ensure operations were not negatively impacted.