This project involved renovating and incorporating additions into the existing Annex building at GA Radiation Therapy Center. The purpose of the project was to bring the area of work up to Ambulatory Healthcare requirements so that it could be used to anesthetize patients (for calming). The program included a new Linear Accelerator (Linac) Room, High Dose Radiation (HDR) room, Prep/Recovery Suite, renovated CT Room, and several support spaces. The Linac and HDR rooms were the most complex spaces to design because both required shielded walls to protect the people outside the rooms from the radiation being generated by the equipment within. For Linac, the shielding requirement was 2′-0″ of concrete and 4 1/2″ of lead bricks. HDR required 2″ of lead brick.