The Double Trolley L-type Gantry Crane is a specialized heavy-duty lifting solution manufactured by Henan Mine, featuring two independent trolleys operating on a robust double-girder bridge structure with an L-shaped leg design that provides exceptional space efficiency and load handling flexibility for extra-long or heavy workpieces.

This crane combines the space-saving advantage of semi-gantry configuration (one L-shaped leg running on a ground rail while the opposite side is suspended from an existing building column rail) with the operational flexibility of dual-trolley operation, allowing both trolleys to work separately for dual-load handling or synchronize for coordinated lifting of ultra-long loads such as 30-50 meter concrete beams, steel girders, pipes, ship sections, and wind turbine blades.

The L-type leg design provides ample clearance under the crane for truck or rail car passage, making it ideal for facilities with existing building columns where floor space is limited. The crane adopts lightweight modular design with full variable frequency drive (VVFD) across all motions for stepless speed control, electronic anti-sway reducing load swing up to 95%, and working duty class A5 to A6 for continuous heavy service. Typical specifications include lifting capacity from (5+5) to (200+200) tons, spans from 7.5 to 35 meters, lifting heights from 6 to 30 meters, ambient temperature range from -20°C to +50°C, and control options including cabin operation, wireless remote, or ground pendant.

This crane is widely used in precast concrete yards, steel service centers, ports, railway maintenance facilities, and heavy fabrication workshops.
Core Applications – Double Trolley L-type Gantry Crane
1.Precast Concrete Plants – Handles extra-long concrete beams (30-50 meters), bridge segments, pipe piles, utility poles, and precast wall panels with two trolleys synchronizing from multiple support points to prevent cracking, while L-leg allows truck access for direct loading.
2.Steel Service Centers & Pipe Yards – Lifts and transports long steel pipes, large structural beams, thick steel plates, and heavy rebar bundles with two trolleys gripping both ends for stable transport without bending, maximizing storage density in space-constrained yards.
3.Shipyards & Marine Construction – Moves large ship sections, propeller shafts, rudders, engine housings, and heavy deck machinery with balanced lifting for asymmetrical marine components, utilizing L-leg design to work against existing building columns in covered construction sheds.
4.Wind Turbine Manufacturing & Assembly – Handles long wind turbine blades (60-80 meters), tower sections, and heavy nacelle components with dual-trolley synchronized operation for blade-to-hub assembly and tower section stacking in facilities with limited floor space.
5.Heavy Machinery Workshops – Positions large components including turbine shafts, generator rotors, transformer cores, and large press frames with independent trolley operation allowing one trolley to load while another unloads, fitting into workshops with existing building columns.
6.Railway Maintenance Facilities – Lifts long rail tracks, complete locomotive chassis, railcar bodies, heavy wheel sets, and traction motors for repair and replacement, with L-leg design allowing rail cars to pass under the crane for direct loading and unloading.