In addition to the emergency department, the project includes three medical-surgery floors, two critical care floors, a behavioral health floor, a floor for surgical services, a basement with other support services and shell space for future growth.

Photo courtesy Caleb Tkach

Designing and building a 12-story tower with a column-free design required close collaboration across the entire project team. The final solution includes a complex two-story steel truss system that supports eight floors of patient rooms in the tower above, suspends a floor of operating rooms below and creates a 160-ft by 130-ft ambulance drop-off area free of columns. To erect the trusses, temporary columns were built to support framing for the lower floors. After the truss placement, column sections from Levels 1 and 2 were removed. Since the steel trusses had to support such a significant portion of the building and spanned more than 120 ft, they weighed more than traditional steel and required more time and coordination to install. This structure also required special isolated foundations and ceiling supports to meet the needs of specialty operating rooms and MRI machines. Active team collaboration and early planning ensured the successful and timely implementation of this design.

Photo courtesy Caleb Tkach

Although the project did not target specific certifications, sustainability was a key consideration throughout design, creating a tower that is projected to use 25% less energy than a comparable code-compliant hospital. Mechanical systems employ an efficient airside design that divides the floor plate into thirds, with a vertical distribution strategy that reduces branch ductwork pressure drop and associated fan horsepower.

Additionally, the tower is connected to district steam and chilled water, making use of a heat recovery chiller (HRC) to maximize availability of simultaneous heating and cooling loads. Through the HRC, the building’s domestic hot water heating is fully electrified as well.

Energy modeling showed the HRC will result in a 50-kBtu-per-sq-ft reduction in energy use intensity with a two-year payback on investment when compared with purchasing district utilities. Additionally, the HRC is projected to reduce steam heating and associated carbon emissions by 90%, offsetting 2,500 tons of carbon dioxide annually.

The team used advanced building facade modeling to study daylighting and glare and building energy modeling to select the ideal window sizes, facade materials and shading devices that would enhance user comfort and minimize energy consumption. In addition, the design implemented mindful choices that promoted regionally sourced and environmentally conscious materials.