St. Elizabeth Hospital
Design-assist HVAC contractor for a new 144-bed HSHS replacement hospital in O'Fallon, IL, providing value engineering and leading BIM coordination across trades.
- Owner
- BJC l Washington University School of Medicine
- Value
- $50,000,000+
- Construction Manager
- McCarthy
- Architect
- Cannon/BR+A
- Industries
- Healthcare
- Institutional
- icon's role
- Design-Assist
- Engineering
- Fabrication & Modular
- Mechanical Construction
- HVAC & Sheet Metal
icon Mechanical delivered a $72 million mechanical scope on BJC's Phase III - Plaza West Tower, serving Barnes-Jewish Hospital, St. Louis Children's Hospital, and Washington University School of Medicine. The 16-story, 660,000 SF, 225-patient-room tower is part of BJC's master plan for its flagship St. Louis campus. icon provided high-quality mechanical systems and components across the patient floors and mechanical spaces, with piping fabrication, sheet metal fabrication, and HVAC installation at the core of its delivery.
Through innovative offsite modularization, icon minimized onsite labor, reduced installation space and time on a logistically challenged site, and kept the work on schedule and within budget
Scope of Work
Patient Floors
- Mechanical piping
- Ductwork
- Medical gases
- Multi-trade racks
- Mechanical insulation
- BIM modeling & coordination
- Design-assist engineering
Mechanical Spaces
- Mechanical equipment: chillers, cooling towers, pumps, air handling units, exhaust fans, heat exchangers, steam PRV stations, medical vacuum pump, medical air compressors, fuel oil system
- Piping: condenser water, chilled water, heating hot water, steam & condensate, generator exhaust, medical gas systems
- Ductwork
- BIM modeling & coordination
- Design-assist engineering
Prefabrication Innovations
- icon led the design, construction, and installation of 120 prefabricated multi-trade racks
- Each rack carried five trades — plumbing, HVAC sheet metal, piping & medical gas piping, carpentry, and electrical
- ~150 LF of hydronic and medical-gas piping per rack; 60–70 LF of supply, return, and exhaust ductwork per rack
- Designed seismically and structurally to support both the utilities within them and the patient lifts below the ceiling
- Incorporated drywall and penetrations between patient rooms
Project Insights
- $72M mechanical scope · 16 stories · 660,000 SF · 225 patient rooms
- 120 prefabricated multi-trade racks carrying 5 trades
- Zero recordable safety incidents across the entire mechanical scope
- Offsite modularization kept the project on schedule and within budget
Project Recognition
- 2025 AEC Outstanding Specialty Contractor Project of the Year
- 2025 AEC Built for Excellence Award – Health, Safety & Wellbeing
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