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 Fixed Height Minimum Overall Height Not Applicable Maximum Overall Height 17.3 ft Minimum Height Under Beam Not Applicable Maximum Height Under Beam 16 ft Minimum Overall Span Not Applicable Maximum Overall Span 25.6 ft Minimum Clear Span 22.6 ft Maximum Clear Span 22.7 ft Mobility Under Load Mobile Rotating Legs No