Gantry cranes are lifting machinery used in outdoor yards, material storage areas, and similar settings, representing a variant of bridge cranes. Two support legs are installed beneath the load-bearing main beam, enabling direct movement along ground-level tracks. Their metal structure resembles a gate-shaped frame. The ends of the gantry crane's main beam may feature extended cantilever beams. They offer high site utilization, a large operational range, broad adaptability, and strong versatility. Below is an overview of gantry crane classifications to assist in selecting the appropriate model for your needs.

1. By presence of cantilevers:

- Cantilever-free gantry cranes

- Double-cantilever gantry cranes

- Single-cantilever gantry cranes

A cantilever refers to the section of the main girder extending beyond the outer edge of the support legs, typically not exceeding one-third of the main girder's inner length. 2. By main beam configuration: - Single-girder gantry cranes feature one main beam, offering simpler structure and commonly using box-type beams. Compared to double-girder models, they exhibit lower overall rigidity and are typically used for loads under 20 tons.

Double-girder gantry cranes feature two main girders, with the MG-type double-girder gantry crane being the most common. Double-girder gantry cranes offer high load capacity, large spans, excellent overall stability, and diverse models. However, their self-weight is greater than that of single-girder gantry cranes with the same lifting capacity, and their cost is higher. Based on main girder structure, they can be further classified into box-type and truss-type.

3. By Main Beam Structure:

Classified into box-type and truss-type.

Box-type gantry cranes utilize steel plate welded into a box structure, offering high safety and rigidity. Truss-type gantry cranes employ structures welded from angle steel or I-beams, with advantages including lower cost, lighter weight, and better wind resistance. Disadvantages include greater deflection, lower rigidity, and relatively reduced reliability.

Following the classification of gantry cranes, we now explain the meanings of crane model designations such as MG, ME, MZ, and MC:

- Letter M denotes gantry type

- Letter G denotes single-trolley hoisting mechanism with hook as lifting device

- Letter E denotes double-trolley hoisting mechanism with hook as lifting device

- Letter Z denotes grab as lifting device with one hoisting trolley

Letter C denotes electromagnetic suction cup as lifting device, also with one hoist trolley;

Letter A denotes electromagnetic suction cup and hook as dual-purpose lifting devices;

P denotes grab and electromagnetic suction cup as dual-purpose lifting devices;

N denotes grab and hook as dual-purpose lifting devices;

S denotes lifting device capable of hook, grab, and electromagnetic suction cup as triple-purpose.

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120t Bojiang Crane

Combining these letters with M forms the gantry crane model categories:

1. MG Type: Single-trolley double-girder gantry crane

2. ME Type: Double-trolley double-girder gantry crane

3. MZ Type: Double-girder grab gantry crane

4. MC Type: Electromagnetic double-girder gantry crane

5. MA Type: Dual-purpose electromagnetic hook and grab double-girder gantry crane

6. MP Type: Grab and electromagnetic dual-purpose gantry crane

7. MN Type: Hook and grab dual-purpose double-girder gantry crane

8. MS Type: Hook, grab, and electromagnetic triple-purpose gantry crane

Different gantry crane models suit distinct applications. Select the appropriate type and model based on your specific requirements.

As a globally leading crane supplier, Henan Mine Crane offers a comprehensive product range from 5 tons to 500 tons. We provide customized designs based on client site drawings, load characteristics, and environmental parameters. Our full lifecycle services deliver one-stop solutions including site surveys, design planning, installation and commissioning, as well as regular maintenance.

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