Bob Elmore & Assoc. Photography
Bob Elmore & Assoc. Photography
Bob Elmore & Assoc. Photography

Northwestern Medicine: Delnor Hospital Linear Accelerator Replacement

Bulley & Andrews completed the linear accelerator replacement in Delnor Hospital’s Radial Oncology Suite. The project included the demolition, removal, and replacement of an existing linear accelerator vault connected to the cancer center. The new, 2,400 sq. ft. vault was needed to house the new linear accelerator that the medical center had purchased from Varian.

B&A completed the removal of one side of the existing building, providing temporary shoring of the existing structure, and erecting a 50’ weather-tight temporary wall to protect the hospital during the demolition and construction. Temporary MEP relocations had to be completed prior to the work, along with the relocation of an existing rooftop AHU, and chiller, which fed an existing linear accelerator adjacent to the work area.

Once the demolition of the existing, concrete vault was completed, rammed aggregate piers were used to transfer foundation loads to acceptable soils. A new, lager footprint vault was erected, and new exterior skin was installed to match the existing building. The new vault included a large sky factory lighting the ceiling, new millwork cabinetry, and a new vault door. High density block shielding was substituted for sheet steel radiation shielding as a cost savings VE item to the owner.


Northwestern Medicine

Project Size

2,400 sq. ft.

Architect / Engineer

Callison Architecture


Construction Management


Geneva, IL