About the Project
Lockheed Martin’s fourth Missile Assembly Building (MAB 4) on its Courtland, Alabama campus expands its presence in the Northern Alabama region.
This pre-engineered metal building (PEMB) comprises a 40,000 SF, 40’ tall high-bay assembly space and an 18,000 SF 14’ tall low-bay space. In addition to the low- and high-bays, MAB 4 also includes an 8,000 SF airlock/loading dock area, a 12,000 SF paint booth annex, a 400 SF air compressor PEMB building, a standalone 100-person capacity tornado shelter, a parking lot and miscellaneous civil and site work.
The low-bay houses roughly 20-50 employees and comprises offices, conference space, restrooms, locker space, and additional assembly space for ground support equipment and payload vehicle assembly. The high bay consists of two bridge cranes spanning the south bay with 5-ton and 25-ton capacities, with the opportunity to install future cranes in the north bay. These cranes, in conjunction with the super-flat concrete slab tolerances, allow air pallets to glide across the conductive epoxy flooring installed throughout the high bay assembly area.
Due to the sensitive nature of the assembly material, the entire facility is heavily grounded to prevent any type of static electricity or energy within the high bay. The epoxy system that covers the floor is conductive epoxy, which has upwards of a 500,000 Ohms resistance, and the entire structure is surrounded by a catenary lightning protection system made up of roughly twenty, 75’ tall poles.
Hensel Phelps constructed the base building of the MAB4 from contract award to substantial completion in an aggressive nine-month schedule. This enabled Lockheed Martin to take ownership of the facility to meet its program’s needs.
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