Introducing our L Type Single Girder Gantry Crane, a versatile and efficient solution for your material handling needs. Designed with an L shaped leg structure, this crane is ideal for handling long items such as steel pipes and offers optimal use of space beneath the main girder.

Types of L Type Gantry Crane

L Type Gantry Cranes with Hoists

MDG L Type Gantry Cranes

Design and Structure

L-type gantry cranes are designed with a clear purpose: to safely and efficiently handle long, oversized, or awkwardly shaped loads that traditional cranes often struggle with. Their layout balances strength, stability, and flexibility, making them especially useful in shipyards, steel yards, and large manufacturing plants. The unique leg design, strong bridge beam, and reliable trolley system all work together to provide smooth movement, precise positioning, and the clearance needed for handling bulky materials. These cranes are built to last, with heavy-duty steel construction and electrical systems designed to handle tough, continuous work.

1. Main Components

An L-type gantry crane is made up of several key elements, each serving a specific role in safe operation. The horizontal bridge beam spans the width of the crane and supports the hoist and trolley system. The vertical "L"-shaped legs connect to the beam and transfer the load weight directly to the ground or runway. The crane traveling system, which may use rails or wheels, allows the entire structure to move across large working areas. The electric trolley runs smoothly along the bridge beam, carrying the hoist for vertical lifting and lowering. A fully integrated electrical control system links all these parts, managing motion, safety features, and energy efficiency. Together, these components create a reliable lifting solution that can handle heavy loads with stability and accuracy.

2. L Shaped Legs

The L-type gantry crane's distinctive legs are what set it apart from other gantry cranes. One side has a vertical support, while the other is angled to form an "L" shape, creating extra space underneath the beam. This layout is extremely practical for industries handling long or oversized items, such as steel beams, containers, or pipes. Operators can pass loads through the open side without interference, which speeds up workflow and reduces the risk of damage. The angled design also allows side-loading, making it possible to position materials directly from the side of the crane instead of only from the ends. Despite this open configuration, the legs are engineered with bracing and reinforced connections to the bridge beam, ensuring strength and rigidity under heavy loads.

3. Electric Trolley

The electric trolley is the part of the crane that brings precision and control to lifting operations. It houses the hoist motor, gearbox, and braking system, all designed for reliable and safe performance. Advanced options like variable frequency drives (VFDs) allow operators to adjust speed smoothly, reducing load swing and improving positioning accuracy. Precision wheels ensure the trolley moves steadily along the bridge beam, even under heavy loads. For industries requiring high efficiency, features such as automated positioning, remote control systems, and overload protection can be added. The trolley not only lifts and lowers loads but also provides the fine control needed to place long or delicate materials exactly where they are required.

Applications of L Type Single Girder Gantry Crane

L type gantry-crane

The L type single girder gantry crane is designed for tough jobs in open spaces where overhead runways or support structures are not available. Its strong frame, stable design, and wide span make it a reliable choice for moving heavy loads quickly and safely. Because it can work outdoors without extra building support, it is often chosen for industries that handle bulky materials, large components, or goods stored in yards.

  • Granite Industry
  • Cement Pipe Industry
  • Shipyards
  • Steel Yards
  • Storage Facilities
  • Engineering Industry

It is particularly suitable for outdoor material handling where no supporting building or steelwork is available.

1. Granite Industry

In granite processing yards, the L type single girder gantry crane plays a key role in lifting and moving large stone blocks. These blocks are extremely heavy and require careful handling to avoid damage. The crane provides a wide span and stable lifting performance, making it easier to load and unload granite slabs from trucks or move them to cutting and polishing machines. Since most granite yards are outdoor facilities, this crane's ability to work without overhead support makes it a cost-effective and safe choice.

2. Cement Pipe Industry

Cement pipe manufacturers use this crane to handle precast concrete pipes of different sizes. The L type design provides open space under the girder, making it easier to move long and bulky pipes without obstruction. It helps with loading finished pipes for delivery, unloading raw materials, and shifting products within the yard. The crane's outdoor adaptability reduces reliance on forklifts and speeds up production cycles while ensuring safer handling of heavy pipes.

3. Shipyards

Shipyards require heavy-duty lifting solutions for handling steel plates, ship components, and machinery. The L type single girder gantry crane supports these needs by covering large outdoor work areas where building supports are not practical. Its robust structure allows it to lift and move materials efficiently across the shipyard. The open leg design also provides more clearance for oversized parts, making it easier to assemble and repair ships.

4. Steel Yards

Steel yards deal with beams, coils, and plates that are long, heavy, and difficult to move with conventional equipment. This crane offers the strength and span to handle such loads efficiently. It can be fitted with different lifting tools like magnets or grabs, depending on the type of steel being handled. Since steel yards are often outdoor storage areas, the crane's weather-resistant design and reliable performance make it a perfect fit for continuous operations.

5. Storage Facilities

In outdoor storage yards, materials of different shapes and weights need to be moved quickly and stored in organized layouts. The L type single girder gantry crane provides a wide coverage area and easy operation, making it possible to load, unload, and reposition goods efficiently. Its flexible design also allows operators to maximize space use, improve workflow, and reduce the time needed for handling goods.

a-l-type-gantry-crane1
l-type-gantry-crane-with-hoists

Safety Features

Safety for both operators and equipment is a primary consideration in the construction of L-type gantry cranes. In order to reduce dangers during lifting operations, modern cranes incorporate sophisticated monitoring systems and fail-safe devices. By avoiding abuse, these features not only keep people safe but also increase the crane's lifespan and decrease downtime. For industries that require efficiency and heavy-duty handling, L-type gantry cranes provide a dependable and safe working environment by integrating emergency controls, electrical protection, and mechanical safeguards.

1. Overload Protection

An overload protection system is one of the most important safety features in an L-type gantry crane. It uses sensors to monitor the load weight in real time, ensuring it never exceeds the crane's rated capacity. When an overload is detected, both an audible alarm and a warning light alert the operator immediately. In many cases, the hoist automatically stops lifting until the excess load is reduced. This prevents stress on the crane structure, reduces the chance of cable or motor damage, and protects workers from dangerous lifting failures.

2. Limit Switches

Limit switches play a vital role in controlling hook movement. These switches are placed at the highest and lowest travel points of the hoist. If the hook travels too far in either direction, the system cuts off power to the motor instantly. This prevents the hook from colliding with the crane frame above or dropping too far below, which could cause cable slack or dangerous snapping. By stopping the hoist at precise points, limit switches improve operational accuracy and help maintain the crane's mechanical integrity.

3. Emergency Stop System

Every L-type gantry crane includes emergency stop buttons that are clearly marked in red and positioned for quick access. When pressed, these buttons instantly cut power to all crane motions, stopping the hoist, trolley, and bridge drives at once. This immediate shutdown can prevent accidents in the event of a system failure, sudden obstacle, or human error. Having emergency stops within reach ensures that operators and ground personnel can react quickly to unexpected hazards, adding a crucial layer of safety in busy worksites.

4. Voltage Protection

Electrical stability is essential for safe crane operations, especially in industrial environments with fluctuating power supply. L-type gantry cranes include under-voltage and over-voltage protection systems inside their control panels. If the incoming power goes beyond safe operating levels, the system locks out the drives and motors to prevent damage. This not only protects sensitive electronic components but also reduces the risk of electrical fires or breakdowns. With voltage protection, operators can rely on consistent and safe crane performance.

5. Control Options

Control systems for L-type gantry cranes are designed to match different working needs. The cabin control option places the operator inside an enclosed cabin with a clear view of the entire work area. From this position, operators can manage lifting, trolley movement, and crane travel with precision. Cabin controls are often preferred in outdoor or large-scale facilities where the operator needs protection from weather and dust. Other options, such as pendant or remote controls, can also be configured depending on operational requirements and site safety policies.

Technical Parameters

Main Parameters List
Crane Traveling Mechanism Traveling Speed(m/min) 20
Motor Type Cone Squirrel-cage
Power(kw) ZDY21-4/0.8X2
Hoist Lifting Mechanism and Traveling Mechanism
Electric Hoist Model		 CD1,MD1,HC
Lifting Speed(m/min) 8 0.8/8
Span(m) 12-30
Lifting Capacity(t) 3-32Ton
Lifting Height(m) 6,9
Traveling Speed(m/min) 20
Motor Cone Squirrel-cage
Work Duty Intermediate Jc=25%
Power Supply 380V 50Hz 3P
Wheel Diameter Φ270 Φ400
Reducer ZSC650 ,LD

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