Portable Gantry Crane Body Material Steel Maximum Lifting Capacity 4 000 lb I-Beam Flange Width 5.5 in I-Beam Height 15 in Height Adjustability Adjustable Height Minimum Overall Height 7.3 ft Maximum Overall Height 10 ft Minimum Height Under Beam 6 ft Maximum Height Under Beam 8.8 ft Minimum Overall Span Not Applicable Maximum Overall Span 25.3 ft Minimum Clear Span 23.7 ft Maximum Clear Span 23.6 ft Mobility Under Load Mobile Rotating Legs Yes Span Adjustability Fixed Span