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The Sibley Proton Therapy project was 81,500 gsf, 20,070 cubic yards located at John Hopkins Kimmel Cancer Center. The 3-story Proton Center is comprised of 3 gantries and 1 fixed beam room. Nearly all the concrete on the project considered 鈥淢ass Concrete鈥� due to the 5鈥� thick foundation and shear walls, as well as 5-13鈥� thick elevated decks. The Lid of the gantries were 13鈥� thick and had to be framed over 50鈥� high.