Grand Ledge, Michigan – 1237 Tons
The Michigan Army National Guard’s new Army Aviation Support Facility (AASF) will serve to store and maintain their fleet of Apache Helicopters. This modern facility consists of three (3) separate buildings totaling 156,414 square feet. Douglas Steel was contracted by The Christman Company to fabricate and erect 1,237 tons of structural steel and miscellaneous iron for this project.
The first structure is the office and training building. This 56,202 square foot building is a two-story steel structure with a steel truss system for the roof and a 6″ inch deep x 16 ga. metal roof deck. The trusses are 20′-0″ feet apart and braced laterally with struts and the 6″ inch deep metal roof deck. This office building is surrounded by numerous galvanized steel canopies.
The second is a 56,430 square foot primary maintenance hangar standing 54 feet tall. This is a “cable-stayed structure”, supported in the center of the building with four (4) main columns. The front and back walls have a 300 foot clear span door opening framed with 300 foot long trusses. This feature allows the owner to have a long un-obstructed span, thus allowing several helicopters at one time to enter or exit this facility. This was complex structure to erect. Several shoring towers had to be constructed and many high-strength screw anchors had to be drilled in the ground to serve as anchor points for the support cables. These cables stabilize the truss system until horizontal, lateral bracing and the 6″ deep x 16 ga. roof deck is installed. Multiple large cranes had to be employed.
The third building is an un-heated 43,782 square foot aircraft storage facility with an open storage area. The front wall is framed with two (2) 141 foot long trusses allowing for clear span door openings. The structure is approximately 33 feet tall.