State of Michigan Department of Management and Budget
Army Aviation Support Facility
Grand Ledge, Michigan
- Contract Type:
- Scope of Services:
- Cost Range:
- General Contract
- Addition and Renovation
- 156,000 s.f.
- January, 2007
The two-story facility, designed as a maintenance building for helicopters, includes a 56,000 s.f. office building, a 56,000 s.f. clear-span helicopter maintenance building complete with in-floor radiant heat and a 44,000 s.f. unheated hangar plus miscellaneous support structures and expansion of the current helicopter tarmac area. The facility is situated on 60 acres of land located next to the existing Army National Guard Facility and Grand Ledge Public Airport. All sections of the facility have steel frames, metal deck roofs, steel decking, and concrete floors. The new facility allows the Army to perform higher levels of maintenance on helicopters and increase operational readiness rate. It is large enough to accommodate aircrafts as large as the CH-47 Chinook houses up to 23 UH-60 Blackhawk helicopters indoors, which significantly reduces maintenance costs.
The administrative section of the facility contains offices for Flight Operations and Training Personnel in addition to a 100-seat classroom and a 30-seat briefing room.
This project required unique methods to complete the erection of the maintenance hangar structural steel. The 170-foot by 330-foot clear-span, cable-stayed structure required a complex temporary support system for erection purposes. A complex erection plan was developed which incorporated cables, bracing and shoring towers. The largest of the clear-span trusses was 16 feet tall and 330 feet long. The trusses were delivered and erected in four sections. After removal of the temporary hydraulic jacks and shoring towers, the dead load deflection was consistent with the design at approximately 4-1/8 inches downward.
Other challenges to the project included an in-floor heating system in the seven-inch thick hangar floors, extremely tight tolerances in installation of the hangar doors, a demanding schedule, and harsh winter construction conditions.