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Gagnon Cardiovascular Center Overbuild - STO Building Group
Structure Tone is a global leader in construction management and general contracting services with offices located in the US, UK, and Ireland. Founded in 1971, the company is among the world’s top twenty construction companies worldwide, responsible for more than $3.5B in annual construction volume.
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Gagnon Cardiovascular Center Overbuild

As part of Atlantic Health System’s (AHS’s) ongoing mission to provide the most advanced heart care at Morristown Medical Center, The Gagnon Cardiovascular Institute is undergoing a two-story expansion that includes 72 private patient rooms, a five-elevator vertical expansion, and two stairwells.

During the preconstruction phase, Structure Tone New Jersey worked closely with AHS and their design partners to provide real-time budgeting and create a technical, logistical strategy to add two stories on top of occupied patient rooms. The technical components the team considered in their logistical approach included:

  • Steel beam installation: The team will maintain a watertight envelop at the end of every workday.
  • HVAC: Phased steel installation will allow existing AHUs to stay active until the new AHU is online.
  • Three-bank patient elevator phased expansion: One elevator will remain active as the other two are being renovated. Once the two are turned over, the team will expand the last car.
  • Two-bank passenger elevator expansion: The team will maintain a watertight envelop at the end of every workday.
  • Two stairwells vertical expansion: The team will maintain a watertight envelop and stairwell egress while the roof is being removed.
  • Curtainwall system: Anchoring details are different on each floor and require a detailed logistical approach. The existing parapets will be opened for steel plate supports, flashing, and bolting the curtainwall starter track. The team will maintain a watertight envelop at the end of each shift.

These logistical details had to be planned ahead of time for proper subcontractor purchasing and to maintain Atlantic Heath System’s budget.


Atlantic Health System, Morristown Medical Center


100 Madison Avenue


Morristown, NJ




Francis Cauffman



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