Truck-mounted cranes vs. Marine cranes: How big are the design differences when they are both lifting capacities?

Although truck-mounted cranes and Marine cranes seem to have similar functions, they have actually undergone in-depth evolution for different environments. One has to deal with the bumpy road, and the other needs to conquer the rough waves

I. Core Design Differences

Mobility

Truck-mounted crane: Installed on the truck chassis, it has strong road mobility and is suitable for frequent site transfer operations.

Marine crane: Fixed on the deck of the ship, it cannot move independently and is specially designed for offshore operations.

Environmental resistance capacity

Truck-mounted cranes: They are suitable for slopes and rough roads, but have poor tolerance to seawater and damp environments.

Marine cranes: Resistant to salt spray corrosion, resistant to wave sway, and capable of long-term operation in harsh Marine environments.

Control accuracy

Truck-mounted crane: Hydraulic + mechanical control, suitable for medium and low precision operations, such as the hoisting of building materials on construction sites.

Marine crane: Equipped with a wave compensation system, it can perform dynamic and stable lifting, with an error controlled within 10 centimeters.

Typical tonnage

Truck-mounted cranes: Common tonnage ranges from 1 to 50 tons, with medium and small-sized equipment being the majority.

Marine cranes: The tonnage range is wider, from 1 ton to 300 tons. Large ships mostly use models with a capacity of over 30 tons.

Structural characteristics

Truck-mounted crane: It adopts a folding boom design and is equipped with outriggers to save space and facilitate road travel.

Marine cranes: Usually equipped with A-type frames or masts for support, they have A more robust structure and are designed to resist seawater erosion.

Ii. Why can't they be used interchangeably?

1. Differences in stable systems

Marine cranes must cope with the continuous shaking of waves, so they are equipped with wave compensation systems that adjust the hook position in real time through hydraulic cylinders to ensure precise operation. However, truck-mounted cranes rely on hydraulic outriggers and levels. Although they can cope with short-term jolts, they are unable to handle the dynamic shaking of ships. If forcibly used at sea, they are very likely to capsize.

2. The gap in anti-corrosion design

The Marine environment is highly corrosive to metals. Marine cranes are protected by three layers: 316L stainless steel bolts, hot-dip galvanized structural components, and epoxy resin coating. The truck-mounted crane only requires ordinary anti-rust paint. Long-term contact with seawater will cause it to rust rapidly, leading to equipment failure.

3. Selection of power system

Marine cranes mostly adopt electric-hydraulic systems, relying on the power generation of ships to avoid the pollution of the cabin caused by the exhaust gas from internal combustion engines. Truck-mounted cranes, on the other hand, are directly powered by truck engines. They respond quickly but make a lot of noise and are not suitable for confined Spaces.

Iii. How to Choose?

The advantageous scenarios of truck-mounted cranes

Short-distance transportation of building materials at construction sites

Emergency rescue (such as lifting a car accident vehicle away)

Loading and unloading in the logistics warehouse

The irreplaceability of Marine cranes

Maritime cargo handling (container ships, supply ships)

Marine engineering (Maintenance of Oil Platform Equipment)

Deep-sea fishing (harvesting and releasing large fishing gear)

With technological advancements, some high-end truck-mounted cranes have begun to trial micro-wave compensation systems to enhance stability in complex terrains. Meanwhile, AI anti-collision technology is being popularized in two types of cranes, but the Marine version still needs to address the issue of radar signal interference separately.