The project involved the construction of a 20,000 sf corrosion control aircraft maintenance facility that included a 33-foot high bay area for helicopter maintenance, a low bay area for repair of composite (non-metallic) parts, a paint mixing booth, a paint booth, and miscellaneous offices and work spaces. An operable wall system divided the hangar into two equal bays so that two aircraft could be worked on simultaneously. The hangar doors swung out, pivoting on a single hinge and rolling on a fixed-radius rail embedded in the concrete. The hangar doors acted as supply air plenums, distributing air from four 100,000 cfm roof-top air-handling units. The air was pushed through the high bay toward the opposite wall where the paint fumes and dust were filtered prior to being exhausted.