Goliath Crane

A type of gantry crane with a large bridge structure supported by two or more legs that run on rails laid on the ground. It's designed for heavy lifting and outdoor applications, typically moving loads within a defined area.

Types of Goliath Crane

Single Girder Goliath Cranes: One main beam, suitable for lighter to medium loads.

Double Girder Goliath Cranes: Two main beams, for heavy loads and wider spans, allowing the hoist to run on top of the girders.

Semi-Goliath Cranes: One leg runs on a ground rail, while the other end runs on an elevated rail (often on a building structure).

Container Handling Goliath Cranes (e.g., Rubber Tired Gantry - RTG or Rail Mounted Gantry - RMG): Specialized for loading/unloading shipping containers.

Applications in Various Industries

Shipyards & Ports: Lifting ship components, containers.

Precast Concrete Yards: Handling large concrete elements.

Steel Mills: Moving heavy steel coils, plates.

Construction Sites: Lifting large structural components.

Power Plants: Heavy equipment installation and maintenance.

Freight Yards: Loading/unloading railcars.

Technology:

Robust Steel Structure: Designed for high loads and wind resistance.

Hoisting Mechanism: Wire rope hoists (single or double drum) for heavy lifting.

Trolley: Moves the hoist along the bridge girder.

Gantry Travel Drives: Electric motors with gearboxes and brakes for movement along the ground rails.

Variable Frequency Drives (VFDs): For smooth, precise control of all motions (hoist, trolley, gantry).

Safety Features: Limit switches, overload protection, anti-collision systems, storm anchors, wind speed sensors.

Remote Control & Cab Control: Operator interfaces.

Advanced Control Systems: PLC-based, potentially with automation features.

Material Selection Considerations

• Structural Steel: High-strength structural steel (e.g., ASTM A572 Grade 50, A36, European equivalents like S355, S275) for girders, legs, and main frame.
• Rails: High-carbon steel crane rails.
• Wheels: Forged steel, hardened for wear resistance.
• Gears: High-strength alloy steels, often hardened.
• Wire Rope: High-tensile steel wire.
• Motors & Gearboxes: Cast iron, robust steel housing.
• Electrical Enclosures: Galvanized steel, stainless steel for outdoor protection.
• Coatings: Multi-layer industrial paint systems or hot-dip galvanizing for corrosion protection in outdoor environments.