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Gantry Crane

Why choose us

Our Factory
Henan Puwei Machinery Equipment Co., Ltd. is a high-tech joint-stock enterprise with a good reputation both domestically and internationally. It was established on October 29, 2018, and its registered address is No. 8, Nanpu Shuangchuang Industrial Park, Changyuan County, Xinxiang, Henan Province. The company specializes in the manufacturing of hydraulic and lifting machinery.

Our Product
The business scope includes the sales, installation, and maintenance of lifting equipment, hoists, dam top door operators, electric flat cars, electric hoists, cranes, winches, lifting accessories, hydraulic metal structures, engineering machinery, and complete machines.

Product Application
Lifting equipment has a wide range of applications across construction, manufacturing, mining, aviation, shipping, logistics, and other industries. With the continuous advancement of science and technology, the design and manufacturing processes of lifting equipment are also constantly improving, providing better handling services to users from all walks of life.

Production Market
In recent years, our company has adhered to the concepts of efficiency, professionalism, and integrity. We have achieved outstanding performance for our customers and received widespread praise. Our products are distributed throughout China's Yunnan, Hubei, Hunan, Guangdong, Guizhou, and other regions, with a significant number of cranes and hoisting machinery exported to Southeast Asian countries such as Vietnam, Laos, and Myanmar.

Our Service
Our company adheres to the ISO9001 international quality system as the standard, with strict corporate management as the guarantee. It is our firm commitment to provide customers with high-quality pre-sales, sales, and after-sales services. Enthusiasm, timeliness, satisfaction, and thoughtfulness are the tenets of our after-sales service. If customers provide feedback on product quality, the company will resolve any inconveniences and offer technical consultation and services in the shortest possible time.

What is Gantry Crane

A gantry crane is a type of overhead crane with a single or double girder configuration supported by freestanding legs that move on wheels or along a track or rail system. Gantry cranes are usually considered when there is a reason not to incorporate an overhead runway system.

MG Type Gantry Crane

MG type gantry crane, also known as gantry crane, is a loading and unloading equipment widely used in open warehouses, storage yards, railway freight stations, port terminals and other places. It can

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MH Hoist Gantry Crane

MH type hoist gantry crane is a kind of small and medium-sized crane with track operation, which is used with CD1 type, MD1 type electric hoist. According to the number of electric hoards, it can be

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ME Gantry Crane

ME type gantry crane, especially suitable for heavy industrial sites such as shipyards. This crane has a variety of functions, such as single lifting, double point lifting, three point lifting, etc.,

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L Type Gantry Crane

L-type gantry crane, also known as L-type gantry crane, is a single main beam gantry crane. It is suitable for loading and unloading and handling of various materials in open places and warehouses,

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Gantry Crane Product Features

Adjustable Height: Many gantry cranes offer adjustable height options, allowing for customization based on the specific needs of the task or workspace.

Portable Design: Mobile gantry cranes are designed for easy movement and relocation within a facility, enhancing operational flexibility.

Heavy-Duty Construction: Built with robust materials, gantry cranes are designed to handle heavy loads and withstand harsh industrial environments.

Versatile Configurations: They are available in various configurations, including fixed, semi-gantry, and mobile versions, to suit different operational requirements.

Electric or Manual Operation: Gantry cranes can be equipped with electric motors for automated movement or manual systems for greater control and precision in handling.

Load Capacity Range: They come in a wide range of load capacities, from small models for light loads to massive cranes capable of handling several tons.

Weather Resistance: Outdoor gantry cranes are often designed with weather-resistant features to ensure durability and reliability in all conditions.

How Does a Gantry Crane Work?

Here’s a step-by-step explanation of how gantry cranes work:

Load Positioning: Before lifting the load, the gantry crane must be positioned correctly. If it is a rail-mounted gantry crane (RMG) or a rubber-tired gantry crane (RTG) used in shipping ports or container yards, it runs along fixed tracks or rubber tires to reach the desired position. For stationary gantry cranes, the load is brought to the crane using forklifts or other material handling equipment.

Load Attachment: The load to be lifted is securely attached to a lifting device, which could be a hook, web sling, or specialized lifting attachment, depending on the type of load.

Lifting Operation: The lifting mechanism of the gantry crane, which includes an electric or hydraulic hoist, is activated. The hoist uses a combination of pulleys, gears, and motors to lift the load. As the hoist’s motor turns the drum, the wire rope or chain connected to the lifting device winds up, lifting the load vertically.

Horizontal Movement: To move the load horizontally, the entire gantry crane is equipped with a trolley mechanism. The trolley, which holds the hoist, runs along the length of the girder(s) using wheels or a rail system. By moving the trolley back and forth, the load can be precisely positioned along the girder.

Vertical Movement (If Applicable): Some gantry cranes, especially adjustable-height gantry cranes, can adjust their height. This is achieved through telescoping sections of the A-frame legs or hydraulic systems. The vertical movement enables the crane to lift loads to different heights, accommodating various lifting requirements.

Load Placement: Once the load is lifted and in the desired position, the hoisting mechanism is stopped, and the load is carefully placed or lowered to the target location.

Load Handling and Safety: Throughout the entire lifting and movement process, operators must follow strict safety protocols. This includes avoiding exceeding the crane’s rated lifting capacity, maintaining a safe distance from the load, and utilizing safety features like limit switches and overload protection mechanisms to prevent accidents.

Types of Gantry Cranes

Gantry cranes are categorized based on their configuration, design, and weight capacity. These factors are interconnected and play a crucial role in determining the specific type of gantry crane suitable for a particular application.

Full Gantry Crane
The full gantry crane is the standard configuration, featuring a cross beam, legs, and a hoist. It can run on wheels, rails, or tracks. Depending on their size, full gantry cranes can be either mobile or stationary.

Semi-Gantry Crane
A semi-gantry crane features one leg and utilizes a wall-mounted I-beam to support the other side. Its composition includes a bridge, crane mechanism, trolley, and hoist. Combining elements of both overhead and gantry cranes, semi-gantry cranes can be installed both indoors and outdoors. Often, they are positioned below an overhead crane to enhance work efficiency without disrupting the operation of the overhead crane.

Portable Gantry Crane
Portable gantry cranes are lightweight and mounted on rubber wheels or casters. They typically have a lifting capacity ranging from half a ton to five tons and come in various heights and spans. Offering an economical solution for infrequent lifting needs, portable gantry cranes provide the same efficiency as permanent cranes. They can be easily moved to different locations within a facility to lift or position materials as needed.

Adjustable Gantry Crane
Adjustable gantry cranes come in various types, including portable and fixed models, and allow for modifications in height, width, and horizontal beam length to accommodate different loads. The primary benefits of adjustable cranes are their flexibility and convenience. While small adjustable gantry cranes are common, larger permanent single girder models are also available. Many gantry cranes, regardless of type, feature adjustable aspects to enhance their versatility.

Single Girder Gantry Crane
A single girder gantry crane features one bridge beam with a hoist trolley that operates along the lower portion of the crane. Its components include the main beam, support legs, cross beam, crane drive, controls, and hoist. Single girder gantry cranes can be equipped with various types of lifting hoists, including European models, depending on specific work requirements. They can be configured as either semi-gantry or full gantry cranes and adapted to fit different working conditions.

Double Girder Gantry Crane
A double girder gantry crane features two girder beams forming the bridge, which can accommodate either a top-running or under-running trolley. Designed for extremely heavy-duty applications, double girder gantry cranes offer a high bearing capacity, large span, and excellent stability. They can lift loads reaching hundreds of tons and are available in both semi-gantry and full gantry configurations, often with A-frame legs.

Truss Gantry Crane
A truss gantry crane features a girder, legs, and cross beams constructed from interconnected shafts. The trolley runs on top of the truss girder and may include a driver’s cabin. These cranes are lightweight with reduced wheel pressure and can lift loads ranging from five to one hundred tons. Truss gantry cranes come in various lifting heights and spans and can be configured as any type of gantry crane, regardless of the specific design of the girder and frame.

Box Gantry Crane
A box gantry crane features a four-sided box structure as the crane bridge, with the hoist trolley attached to the bottom of the box. This design allows for a longer bridge span and greater load capacity. Box gantry cranes can be configured as single or double box types, with the double box design suited for extremely heavy-duty lifting. They are typically installed in locations where an overhead crane cannot be used. The box-style girder is mounted on A-frame columns that rest on heavy-duty wheels.

L-Shaped Gantry Crane
The L-shaped gantry crane features a single beam and uniquely designed L-shaped legs. This design allows it to handle extended loads efficiently. It is commonly utilized in freight yards, railroad stations, and storage facilities. With a load capacity ranging from five to fifty tons, it offers low dead weight and minimal wheel pressure. Additionally, it can be equipped with a soft start mechanism for extended travel, ensuring smooth and stable operation.

Gantry Crane Applications

There are many different applications for gantry cranes. Some of the most common include:

Warehouse/Storage Facilities: Gantry cranes come in various shapes and sizes, depending on the size and weight of the cargo. You can use a variety of gantry cranes, ranging from small single girder variants to giant double girder versions. Small gantry cranes with rubber tires allow for movement without relying on tracks.

Manufacturing Plants (Especially Those with Large Machinery): Gantry cranes are useful in various industries, from small to large, including automotive, steel production, and aircraft manufacturing. These industries are among the most prevalent users of gantry cranes. Depending on your needs, you can utilize single or double girder, portable, and adjustable types of gantry cranes.

Railroads and Ports: Because of their portability and ease of setup, gantry cranes are ideal for use at ports. They load cargo onto ships via rail or truck. Importantly, most of these types of gantries can move without too much hassle when needed.

Shipping Yards and Docks: If you manage a port or shipping yard, gantry cranes make it easier to load and unload cargo from trucks and ships. Additionally, they facilitate the movement of items within the yards themselves.

Airports: Gantry cranes can be used in airports to load and unload cargo from aircraft. However, due to the sheer size and weight involved, you will need a heavy-duty gantry with double girder beams for this purpose.

Process of Commissioning a Gantry Crane System

The commissioning process involves a series of detailed tests and inspections designed to ensure that the system is safe, reliable, and operating correctly. The following are the steps that a crane engineer will generally follow during this process:

Electrical Testing

Engineers will test the electrical components of the gantry crane system, including the motors, sensors, and control systems, to ensure that they are functioning properly and safely.

Performance Testing

Engineers will test the performance of the gantry crane system, including the speed and accuracy of the hoist and trolley movements, to ensure that the system is operating efficiently.

Documentation

During commissioning, engineers will prepare detailed documentation of all tests and inspections, as well as any necessary adjustments or repairs. This documentation is important for future maintenance and troubleshooting of the gantry crane system.

Load Testing

Load testing involves lifting a specified load with the gantry crane system to verify that the crane can safely handle its rated load capacity.

Safety Checks

Engineers will verify that all safety features and devices on the gantry crane system are functioning correctly, including limit switches, emergency stop buttons, and overload protection systems.

Training

Engineers may also provide training to operators and maintenance personnel on the safe and efficient operation of the gantry crane system, including any specific procedures or protocols that are required.

How to Select a Gantry Crane

How do you select a gantry crane for your application? Choosing the right type of gantry crane will largely reduce the overall cost. Several factors need to be considered in gantry crane selection:

Single Girder Gantry Crane vs. Double Girder Gantry Crane

For capacities of 50 tons or lighter, with a span within 35 meters and no special functions required, a single girder gantry crane is typically sufficient. However, if the working conditions require wider leg clearance and higher working speeds, or if you frequently lift heavy and large objects, a double girder gantry crane is a better choice.

Span and Cantilever Length

The span of the gantry crane is an important factor affecting its quality. When choosing a crane type, if it meets the equipment requirements and standard span conditions, it is advisable to minimize the span.

Principle of Determining Wheel Track

Ensure the crane's traveling stability along the rail direction.
The maximum dimensions of the object should be able to pass through the leg clearance.
The wheelbase should have a definite proportional relationship with the span, expressed as B = (1/4 - 1/6) of the span.

Gantry Crane Span Size

During operation, there should be a safe space between the crane's external dimensions and the cargo or vehicle path to allow sufficient room for loading and unloading. If a truck is working within the span, it should maintain a distance of about 0.7 meters from the crane legs. When the crane is not in operation, the hook should be positioned 0.5 meters above vehicles, and the cargo should be 0.5 meters away from the legs when it is being moved out.

Gantry Crane Main Components

Main Girder: The main girder is the long horizontal structure that spans the width of the gantry crane. It is usually made of steel and supports the hoist trolley and the load being lifted.

Ground Beam: The ground beam is a structural element that provides stability to the gantry crane. It is typically made of steel or concrete and is anchored to the ground.

Flexible Leg: The flexible leg is a type of supporting leg that can adjust to uneven terrain or slopes. It is usually made of steel and can be adjusted to different heights.

Rigid Leg: The rigid leg is a type of supporting leg that is fixed in place and cannot adjust to different heights. It is typically made of steel and provides stability to the gantry crane.

LT Wheel Mechanism: The LT wheel mechanism allows the gantry crane to move along the tracks. It is typically powered by an electric motor and can move in a straight line or turn at a certain angle.

LT Power Supply Cable Reel Drum: The LT power supply cable reel drum supplies power to the gantry crane and prevents the cable from getting tangled.

Lifting Trolley: The lifting trolley moves along the main girder and supports the hoist. It is typically powered by an electric motor and is used to position the load.

Maintenance Platform: The maintenance platform provides access to the various components of the gantry crane for maintenance and repairs.

Driver's Cabin: The driver's cabin is the control room where the crane operator sits and controls the movements of the gantry crane.

Lifting Wire Rope: The lifting wire rope is the cable used to lift and lower the load. It is attached to the hoist and the hook.

Hook: The hook is the mechanism attached to the end of the lifting wire rope and is used to pick up and move the load.

Our Factory

Henan Puwei Machinery Equipment Co., Ltd. was established on October 29, 2018, and its registered address is located at No. 8, Nanpu Shuangchuang Industrial Park, Changyuan County, Xinxiang, Henan Province. The business scope includes lifting equipment, hoists, dam top door operators, cleaning machines, electric flat cars, electric hoists, cranes, winches, lifting accessories, hydraulic metal structures, engineering machinery equipment and accessories, electric hoists, and complete machine parts. Sales, installation, maintenance, and manufacturing.

FAQ

Q: What are the main parts of a gantry crane?

A: The main components of a gantry crane include the main girder, cantilever (if applicable), supporting legs, trolley, driver's cabin, lifting wire rope, hook, and other optional features such as anemometers and lightning rods for windy environments.

Q: What is the anatomy of a gantry crane?

A: The structure includes a horizontal beam (or girder) supported by vertical legs equipped with rubber tires. These mobile gantry cranes are designed for flexibility, allowing them to move freely within a designated area. Key Components: Girder: A single or double horizontal beam that supports the hoist.

Q: What does a gantry crane do?

A: A gantry crane is a crane built atop a gantry, which is a structure used to straddle an object or workspace. They can range from enormous "full" gantry cranes, capable of lifting some of the heaviest loads in the world, to small shop cranes, used for tasks such as lifting automobile engines out of vehicles.

Q: What is the difference between a crane and a gantry crane?

A: An overhead crane, often referred to as a bridge crane is shaped like a moveable bridge whereas a gantry crane has an overhead bridge supported with it's own frame. Bridge cranes are attached to the interior structure of a building and are mounted onto the girders that support the roof and walls of the building.

Q: What category is a gantry crane?

A: A gantry crane is a type of overhead crane with a single or double girder configuration supported by freestanding legs that move on wheels or along a track or rail system. Gantry cranes are usually considered when there is a reason not to incorporate an overhead runway system..

Q: What are the advantages of a gantry crane?

A: Gantry crane is the most versatile and mobile lifting system. They can be best used indoors as well as outdoors, in aluminum or steel with adjustable heights, treads, and spans. Since the gantry crane is not mounted, it can be easily moved to any workstation and could commence lifting in seconds once it is shifted.

Q: Does a gantry crane require a track?

A: If it is a rail-mounted gantry crane (RMG) or rubber-tired gantry crane (RTG) used in shipping ports or container yards, it runs along fixed tracks or rubber tires to reach the desired position.

Q: Can you move a gantry crane while loaded?

A: Most portable gantry cranes allow manual movement under load, but some high-capacity applications require motorized movement. Motorized gantry cranes can use Guide Angle Drives, Crane Rail Drives, or Trackless Drives to travel in a straight line along a fixed path.

Q: What are the duties of a gantry crane operator?

A: These cranes straddle the objects that they lift, and the design allows them to lift heavy loads. Your duties as a gantry crane operator involve controlling these cranes as they lift and release their loads. Your responsibilities include moving the crane into position and ensuring that the load is secure.

Q: What is the difference between a gantry crane and an overhead crane?

A: A gantry crane is flexible compared to an overhead/bridge crane. They are self-sufficient in that their own structure/frame supports them. In many cases, not all wheels are mounted on the gantry crane to make it more versatile. They can also be mounted to a track system for extra security and safety.

Q: What is the lifespan of a gantry crane?

A: The lifespan of gantry cranes is usually 10 to 15 years. Besides, heavy duty cranes always lift large loads, making metal structures and stressed parts more likely to deform and crack. The lifespan of special cranes like Metallurgical Cranes, is shorter, generally 10-15 years, with maintenance and inspections.

Q: How high can a gantry crane lift?

A: The typical height adjustment range is 3 feet in 6″ increments. Therefore, a 9′ minimum hub, has a 12′ maximum hub.

Q: How much weight can a gantry crane lift?

A: Portable gantry cranes are a great option if you are not regularly going to be lifting and are using the crane on different sites. This type of crane has a lifting capacity between 250kg to 5,000kg.

Q: What is the difference between a Goliath crane and a gantry crane?

A: Goliath cranes, sometimes referred to as gantry cranes themselves, are essentially built for the big leagues of lifting. They are essentially supersized gantry cranes designed to handle exceptionally heavy loads in demanding outdoor environments.

Q: What is a gantry crane also known as?

A: A Goliath Crane (Gantry Cranes) is a kind of overhead crane with a single or double girder establishment supported by separate legs that move on wheels or a rail system or along a track.

Q: What is the maximum span of a gantry crane?

A: The maximum load capacity of these cranes can reach up to 100 t, the maximum span up to 40 m, and the lifting height up to 15 m.

Q: What is the difference between a portal and gantry crane?

A: Gantry cranes (they are also called Portal Cranes, the “portal” being the empty space straddled by the gantry) are a type of crane used to straddle an object or workspace and the entire crane can be moved about a workspace.

Q: Can a gantry crane move?

A: V-groove casters can be used with special v-groove track to allow a gantry crane to move in a straight line along a fixed path. Swivel-lock casters can also be locked to allow a gantry crane to travel in a straight line and can be unlocked to allow the crane to turn.

Q: Are gantry cranes electric?

A: 2 Main Power Sources for Gantry Crane Lifts
Electric and hydraulic. Hydraulic – These powerful models offer the highest lifting capacity and can be used to move large loads with ease.

Q: Why is it called a gantry crane?

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