Army Air at White Sands Missile Range requires the purchase of a 14Ft. Tandem Axel Drop Deck Flatbed Trailer with a 12,000lb load capacity, Deck width of 6 Ft. 3 Inches (75 inches) with a hydraulic li... Army Air at White Sands Missile Range requires the purchase of a 14Ft. Tandem Axel Drop Deck Flatbed Trailer with a 12,000lb load capacity, Deck width of 6 Ft. 3 Inches (75 inches) with a hydraulic lift mechanism.