(Click here if drawing doesn't appear above.) 1 Earth cover. 2 Mechanical & electrical equipment room. 3 Duct openings. 4 Stairway. 5 Warhead handling room. 6 5 ton bridge crane. Hook height 16' 0". 7 Top of rail. 8 Vapor barrier. 9 Top of concrete floor. A Emergency escape tunnel. B Top of parapet. C Parapet. D Canopy. E Crane beam and support brackets. F Environmental closure (shown retracted). G Duct openings. H Pipe guard. I Pavement. J Dock bumper. K Winch.