Portable Gantry Crane Body Material Steel Maximum Lifting Capacity 4 000 lb I-Beam Flange Width 6 in I-Beam Height 10 in Height Adjustability Fixed Height Minimum Overall Height Not Applicable Maximum Overall Height 16.8 ft Minimum Height Under Beam Not Applicable Maximum Height Under Beam 16 ft Minimum Overall Span 16 ft Maximum Overall Span 16 ft Minimum Clear Span 15 ft Maximum Clear Span 15 ft Mobility Under Load Stationary Rotating Legs No Span Adjustability Fixed Span