Structural Jib Cranes Free Standing Floor Mounted-Foundation Required Capacities From ¼ Ton To 5 Ton Heights And Spans Up To 20' Wall Cantilever Used When Headroom Is A Premium Capacities From ¼ Ton To 5 Ton Requires Structurally Adequate Wall Or Columns Articulating Can Move Loads Around Corners Capacities From 150 To 2,000 lbs. Spans Up To 16 ft.