The Advanced Test Reactor (ATR) at the Idaho National Laboratory (INL) supports research and testing of materials for use in large-scale and prototype reactors. Building TRA-676 is a 53 ft x 40 ft pre-engineered metal building designed in the 1980s and located adjacent to the reactor building. A portion of the building sits on a 57 ft x 14 ft x 20 ft deep pit enclosure. As part of the ATR Life Extension Project, Battelle Energy Alliance (BEA) considered installing batteries inside this structure to provide backup power to the reactor. SGH evaluated TRA-676 and designed strengthening for both TRA-676 and the pit.