L Type Single Girder Gantry Crane for Outdoor Long-Load Handling

The L type single girder gantry crane features a single main girder supported by L-shaped legs. Compared with a conventional single girder gantry crane, its L-shaped leg design provides a larger handling space and greater clearance between the legs, allowing long loads to pass through more easily. It is suitable for transferring long materials between outdoor storage areas, processing areas, and transport vehicles.

Types of L Type Single Girder Gantry Crane

L Type Single Girder Gantry Crane with Open Winch Trolley

The L type single girder gantry crane with open winch trolley uses an independent open winch hoisting mechanism

• Configured for heavy long loads: The hoisting motor, reducer, drum, brake, and wire-rope system can be matched to the required capacity, lifting height, and speed, supporting the handling of precast concrete beams, steel girders, large pipes, and other heavy long loads.
• Suitable for repetitive yard handling: The A5 duty classification supports repeated lifting and transfer of long structural components in outdoor storage yards, production areas, and loading zones.
• Main and auxiliary hoisting available: The main hoist handles rated heavy loads, while the optional auxiliary hoist supports lighter components and auxiliary lifting tasks, allowing the crane to accommodate different loads within the same operating area.

Materials of L Type Single Girder Gantry Crane with Open Winch Trolley

These materials and treatments provide structural and durability support for reliable long-load handling in outdoor environments.

Main girder, legs, and trolley frame

• Q235 steel plate
• Good weldability and machinability
• Provides structural strength and rigidity

Crane and trolley wheels

• ZG340-640 cast steel
• Tread hardness: HB300-380
• Supports load capacity and wear resistance during rail travel

Brake wheels

• ZG340-640 cast steel
• Hoisting brake wheel hardness: HRC45-55
• Wear-resistant for stable braking

L Type Single Girder Gantry Crane with Open Winch Trolley Parameters

Outdoor Operation Configuration of L Type Single Girder Gantry Crane with Open Winch Trolley

• Wind protection devices: Rail clamps and anchoring devices prevent wind-induced movement when the crane is parked.
• Trolley rain cover: Protects the hoisting and travel mechanisms from rain exposure.
• Outdoor power supply: A cable trolley system with outdoor-rated flat cables supplies power to the trolley.
• Outdoor wiring: Copper-core, rubber-insulated cables are routed through cable troughs, conduits, or flexible hoses.
• Working lighting: Leg platforms include floodlights, while the trolley is equipped with maintenance lighting and power sockets.
• Corrosion protection: Steel plates and sections are sandblasted and coated with primer and topcoat, with a total dry-film thickness of at least 120 μm.

L Type Single Girder Gantry Crane with Double Open Winch Trolley

The L Type single girder gantry crane with double open winch trolley uses two independent trolleys on one main girder. With capacities from 5t to 50t and spans from 18m to 35m, it is suitable for handling long materials in outdoor yards and docks.

• Stable lifting with two lifting points: The trolleys can operate independently or together. Their spacing and load-end height can be adjusted to match the load length and center of gravity, reducing tilt and sway during leveling and placement.
• Reduced reliance on auxiliary equipment: One crane can complete two-point lifting and transfer, reducing repeated lifting-point adjustment, manual assistance, and multi-crane coordination.

L Type Single Girder Gantry Crane with Electric Hoist

The L type single girder electric hoist gantry crane is intended for lighter long loads and routine outdoor handling tasks that do not require an open winch trolley or double-trolley arrangement.

• Suitable for lighter long loads: The 5t and 10t configurations can be used for aluminum profiles, light steel sections, small-diameter pipes, fabricated frames, and packaged long materials, provided that the load weight, center of gravity, and lifting method meet the project requirements.
• Compact hoisting configuration: The electric hoist integrates the lifting and travel functions within a relatively compact structure, making it suitable for routine yard handling where a simpler lifting arrangement is sufficient.
• Additional lifting attachment options: Hooks, grabs, electromagnetic lifting devices, and other attachments can be selected for general loads, bulk materials, or magnetic steel products.

L Type Single Girder Gantry Crane with Electric Hoist Parameters

Compared with the L Type single girder gantry crane with an open winch trolley, the electric hoist version is intended for conventional 5t and 10t lifting. Its simpler, lighter configuration suits lighter loads, fixed workflows, and applications without main and auxiliary hoists. Standardized span and lifting-height options simplify model selection and routine maintenance.

Case: Delivery of Three L Type Single Girder Gantry Crane with Open Winch Trolley

• Rated Lifting Capacity: 10 t
• Span: 35 m
• Lifting Height: 10 m
• Lifting Speed: 8.5 m/min
• Trolley Travel Speed: 0–39 m/min
• Crane Travel Speed: 0–40 m/min
• Trolley Rail Type: P24
• Crane Rail Type: P43
• Maximum Trolley Wheel Load: 75 kN
• Maximum Crane Wheel Load: 222 kN
• Total Power: 35 kW
• Power Supply: 380 V, 50 Hz

The project required lifting and transferring large precast concrete components in an outdoor finished-product yard. The cranes needed to cover the storage area between two runway rails while allowing the hook to reach beyond both rail sides for component stacking and vehicle loading.

We supplied three L type single girder gantry crane with open winch trolley, each with a 26m span and 7m cantilevers on both sides. The trolley can travel into the cantilever areas, extending hook coverage from between the rails to both outer sides. Variable-frequency control of trolley and crane travel improves speed control during starting, stopping, and moving precast concrete components.

This project demonstrates the wide lifting coverage of the L type single girder gantry crane with open winch trolley. The combined span and double-cantilever layout enables one crane to serve multiple areas inside and outside the rails, supporting efficient component storage and transfer.