A 6,700 square-foot annex on the north side of the hangar building is used for administrative offices, ground operations control room and a joint-use shop area.
Inside the hangar, two overhead bridge cranes provide lift capability for orbiter (or aircraft) servicing and maintenance operations. Each crane has a lift capability of 50,000 pounds.
Voorheis, Trindle and Nelson, Irvine, Calif., designed the hangar. It was built by Santa Fe Engineers Inc., Lancaster, Calif., at a cost of $3.7 million. Construction was completed in early 1976.
A concrete tow-way, 60 feet wide and 15 inches thick, connects the MDD and the Space Shuttle hangar with the aircraft ramp at the main Dryden complex, and with the taxiway extending onto the Edwards Air Force Base flightline and runway network.