Aug 16, 2017 · 5-ton capacity; Span of 40 feet or less; Base design trolley, hoist, and bridge; Portable Gantry Crane: $6,000. Capacities from 1-ton to 5-ton; Spans from 8 feet to 30 feet; Heights under boom from 10 feet to 20 feet; Engineered Gantry Crane: $70,000 – $80,000. 5-ton capacity; 40-foot span; Perfect Steerable Transfer Cartludes hoist