Unified 500 Lb Freestanding Bridge Crane Workstation 14' 9" Span 19' RunwayUsed Bridge Crane System. Enclosed Track Freestanding Workstation. Aluminum Bridge and Runway Rails on Steel I Beams and Steel Posts. Rated Capacity: 500 Lbs 4 Upright Posts + (4) I Beams. Post Height: 12' Beam Lengths: 21' (5x8" and 4x8" I beams) Bridge Length: 16' 10" Double rail bridge spaced 24" center. Span Width: 14' 9" (Center to center of runway rails) Runway Rail Length: 19' Under Bridge Height: 9' 6" Overall Clearance Height: 12' 8" Includes