120ton Boat Lifting Gantry Crane

A 120-ton boat lifting gantry crane is a heavy-duty gantry crane designed for lifting and moving boats, yachts, or other marine vessels in shipyards, dry docks, marinas, or boat manufacturing facilities. Here's a detailed breakdown of its features and considerations:

Key Specifications:
Lifting Capacity:

Rated for 120 metric tons (tonnes) or ~132 short tons (US).

Suitable for large boats, yachts, or small ships.

Span & Height:

Adjustable gantry span (distance between legs) to accommodate different boat widths.

Sufficient lifting height to clear dry dock supports or transport vehicles.

Structural Design:

Single or double girder configuration (double girder preferred for heavy loads).

Reinforced steel construction for durability.

Fixed or adjustable leg heights depending on the application.

Hoisting Mechanism:

Electric or hydraulic hoist with precise load control.

Wire rope or chain hoist options.

Optional dual-hoist system for balanced lifting.

Mobility & Movement:

Rail-mounted (crane rails) for smooth movement along a defined path.

Wheel-mounted (rubber tires) for flexibility in outdoor yards.

Manual or motorized travel (variable speed control for precision).

Control System:

Pendant control (wired/wireless) for operator convenience.

Cabin-operated for larger systems.

Safety features like overload protection, limit switches, and emergency stop.

Power Supply:

Electric (3-phase AC) for indoor/outdoor use.

Diesel/hydraulic for remote locations without power.

Special Features for Boat Handling:

Spreader bars or lifting beams for balanced boat lifting.

Nylon/synthetic slings to prevent hull damage.

Anti-sway technology for safe positioning.

 

Comparison: Boat Lifting Gantry vs. Travelift

Feature	Gantry Crane	Travelift
Mobility	Fixed or mobile	Always mobile (tires)
Capacity	Up to 200+ tons	Typically 25–100 tons
Cost	Lower (no pit needed)	Higher (requires pit)
Installation	Minimal foundation	Needs reinforced dock
Versatility	Adjustable for any boat	Limited to boat size

 

Choosing the Right Boat Gantry Crane

Factor	Consideration
Boat Weight	Select a crane with 20–30% more capacity than the max boat weight.
Boat Size	Ensure the span and height fit the boat's dimensions.
Environment	Stainless steel for saltwater resistance.
Mobility Needs	Fixed (permanent) vs. mobile (flexible).
Power Source	Electric (indoor) or diesel/hydraulic (outdoor).

 

Lifting Capacity 1 - 20 tons
Span (Width) 3 - 12 meters (adjustable)
Lifting Height 3 - 10 meters
Working Class A3-A5 (light to medium duty)
Hoisting Speed 0.5 - 8 m/min (variable)
Main Beam Type Single/double girder (box-type)
Power Supply 220V/380V 3-phase or manual
Control Mode Pendant control/wireless remote
Hoist Type Electric chain hoist/wire rope hoist
Travel Drive Manual push or motorized
Corrosion Protection Hot-dip galvanized or marine-grade paint
Wind Resistance Up to Beaufort scale 6 (for outdoor use)
Operating Temp -20°C to +50°C

 

 

A 120-ton boat lifting gantry crane is a heavy-duty structure used for lifting and transporting large boats, yachts, or marine vessels. It consists of several key components that ensure safe and efficient operation. Below are the main components of such a gantry crane:

1. Structural Components
Main Gantry Beams (Bridge/Girder)

Primary horizontal beams that span the width of the crane, supporting the lifting mechanism.

Typically made of high-strength steel (box girder or truss structure) to handle heavy loads.

Legs (Vertical Supports)

Upright columns that provide stability and height to the gantry crane.

Can be fixed or adjustable in height (depending on design).

May include outriggers for additional stability.

End Carriages (Traveling Mechanism)

Wheeled structures at the base of each leg that allow the crane to move along rails or a runway.

Equipped with motors for powered movement (rail-mounted gantry cranes).

 

 

 

2. Lifting Mechanism
Hoist Unit

Electric or hydraulic winch system capable of lifting 120 tons.

Includes wire rope or chain, drum, and motor.

Spreader Bar or Lifting Frame

Distributes the load evenly to prevent damage to the boat hull.

Adjustable for different boat sizes.

Hooks & Shackles

Heavy-duty lifting attachments for securing slings or straps.

 

3. Drive & Motion System
Travel Motors

Electric or hydraulic motors that move the gantry crane along rails.

Wheels & Tracks

Steel wheels or rubber tires (depending on the surface).

Rail-guided systems ensure precise movement.

Braking System

Ensures safe stopping and prevents unintended movement.

 

 

4. Control System
Operator Cabin or Remote Control

Allows the operator to control lifting, lowering, and movement.

Modern systems may use wireless remote controls.

Limit Switches & Sensors

Prevent overloading, over-travel, and collisions.

 

 

5. Safety Features
Overload Protection

Prevents lifting beyond the rated capacity (120 tons).

Anti-Collision System

Ensures safe operation in multi-crane environments.

Emergency Stop (E-Stop)

Immediate shutdown in case of malfunction.

6. Power Supply
Electric Power (Mains or Generator)

For electric hoists and drive systems.

Hydraulic Power Pack (if hydraulic)

Provides pressurized fluid for hydraulic cranes.

 

7. Additional Accessories (Optional)
Adjustable Width Mechanism – For handling different boat sizes.

Synchronization System – Ensures even lifting when multiple hoists are used.

Weather Protection – Corrosion-resistant coatings for marine environments.

 

SKETCH

 

Main technical

 

A 120-ton boat lifting gantry crane is a heavy-duty lifting solution designed for shipyards, marinas, and boat manufacturing facilities. Here are its key advantages:

1. High Lifting Capacity
Can handle boats and vessels weighing up to 120 tons, making it suitable for large yachts, military boats, and commercial ships.

Ideal for dry docking, maintenance, and transportation of heavy marine vessels.

2. Versatility in Applications
Used in shipbuilding, repair yards, marinas, and ports.

Suitable for launching and retrieving boats from water.

Can be adapted for modular construction and assembly of large vessels.

3. Customizable Design
Adjustable span and height to fit different workshop or dock layouts.

Options for fixed or mobile gantry systems (rail-mounted or rubber-tired).

Can be equipped with single or double girder configurations based on load requirements.

4. Enhanced Safety Features
Overload protection to prevent crane failure.

Anti-sway technology for precise load positioning.

Emergency stop systems and fail-safe brakes.

Corrosion-resistant materials (e.g., galvanized steel or marine-grade coatings) for durability in harsh environments.

5. Cost-Effective & Efficient
Reduces reliance on dry docks or slipways, lowering operational costs.

Speeds up boat maintenance and construction by enabling easy lifting and positioning.

Can be operated with electric or hydraulic systems for energy efficiency.

6. Easy Operation & Control
Available with manual, remote, or cabin-operated controls.

Smooth movement via high-quality hoists and trolleys (chain hoists or wire rope systems).

Some models feature synchronized lifting for balanced load distribution.

7. Space-Saving & Mobility
Unlike fixed cranes, gantry systems do not require permanent foundations.

Mobile gantries can be relocated as needed.

Ideal for facilities with limited space or temporary projects.

8. Low Maintenance & Long Service Life
Robust construction with wear-resistant components.

Simple maintenance compared to more complex lifting systems.

Conclusion
A 120-ton boat lifting gantry crane is a powerful, flexible, and cost-efficient solution for heavy boat handling, offering high safety, customization, and operational efficiency in marine industries.

 

A 120-ton boat lifting gantry crane is a heavy-duty lifting system designed for the handling, launching, and maintenance of boats, yachts, and other marine vessels. Below are its key applications and features:

Applications:
Boat/Yacht Building & Repair:

Used in shipyards to lift and position boats during construction, assembly, or repair.

Facilitates easy access to the hull and other components for maintenance.

Marina & Dry Dock Operations:

Lifts boats out of the water for storage, inspection, or winterization.

Enables dry docking without requiring a traditional slipway.

Boat Transportation & Launching:

Moves vessels between workstations, storage areas, and launch ramps.

Safely lowers boats into the water or retrieves them for maintenance.

Custom Boat Manufacturing:

Assists in positioning large hull sections during fabrication.

Supports modular construction processes.

Military & Rescue Boat Handling:

Used by coast guards and naval bases to deploy and retrieve patrol boats, RHIBs, and other small craft.

Fishing & Commercial Vessel Maintenance:

Lifts fishing trawlers, ferries, and small commercial ships for servicing.

 

The production process of a 120-ton boat lifting gantry crane involves several critical stages, from design and material procurement to fabrication, assembly, testing, and installation. Below is a detailed breakdown of the key steps:

1. Design & Engineering
Requirements Analysis: Determine load capacity (120 tons), span, lifting height, and operational environment (indoor/outdoor, marine conditions).

Structural Design:

Gantry frame (box girders or truss structure)

Legs with adjustable heights (if needed for uneven ground)

Hoist mechanism (electric or hydraulic)

Trolley and end carriages for movement

CAD Modeling & Simulation: Finite Element Analysis (FEA) to ensure structural integrity under load.

Regulatory Compliance: Meet standards like ISO, DIN, FEM, or ASME.

2. Material Procurement
Steel Selection: High-quality steel (e.g., Q345B or ASTM A36) for beams, legs, and girders.

Mechanical Components:

Electric or hydraulic hoists (120-ton capacity)

Wire ropes, hooks, and pulleys

Motors, gearboxes, and brakes

Electrical Systems: Control panels, sensors, and variable frequency drives (VFDs) for smooth operation.

3. Fabrication
A. Structural Components
Cutting & Shaping: CNC plasma/laser cutting for precision.

Welding: Submerged arc welding (SAW) for girders; manual welding for joints (qualified welders).

Machining: Drilling holes for bolts, machining rails for trolley movement.

B. Mechanical Assembly
Trolley & Hoist:

Assembly of gears, drums, and wire ropes.

Installation of limit switches and overload protection.

End Carriages: Wheels, motors, and rail alignment systems.

4. Surface Treatment
Sandblasting: Remove rust and impurities.

Painting: Anti-corrosive primer + marine-grade topcoat (epoxy/polyurethane).

5. Quality Control (QC)
Dimensional Checks: Verify tolerances per design.

Non-Destructive Testing (NDT): Ultrasonic or X-ray welding inspections.

Load Testing:

Static Test: 1.25× rated load (150 tons) for 10 minutes.

Dynamic Test: 1.1× load (132 tons) with movement.

6. Installation & Commissioning
On-Site Assembly: Bolt or weld gantry legs and girders.

Alignment: Ensure rails are level for smooth trolley movement.

Electrical Wiring: Connect power supply and control systems.

Operator Training & Handover: Safety protocols and maintenance guidance.

7. Optional Features
Automation: Remote control or PLC systems.

Corrosion Protection: Galvanizing for saltwater environments.

Mobility: Rubber tires or rail-mounted systems.

Key Suppliers & Equipment
Gantry Cranes: Companies like ZPMC, Konecranes, or Eilbeck Cranes.

Hoists: Demag, Columbus McKinnon, or Chester.

Control Systems: Siemens or ABB.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.