Construction gantry crane – Weihua Crane, Overhead Crane, Gantry Crane

A-frame double-girder gantry crane for engineering

cn_whcrane — Fri, 05 Dec 2025 08:55:51 +0000

The A-frame double-girder gantry crane for construction projects adopts a truss structure, featuring low wind resistance, light deadweight, low wheel load, and reliable performance. With its robust construction, smooth operation, and strong wind resistance, it is an indispensable lifting and handling equipment in major infrastructure projects such as highways, railway bridges, and water conservancy hubs.

Advantages & Features

Robust Structure, Strong Wind Resistance

The unique truss or box-type structural design effectively reduces deadweight while meeting超大 span requirements, and possesses excellent wind stability, making it very suitable for outdoor高空作业 environments.

Smooth Operation, Precise Positioning

The crane travel mechanism adopts multi-wheel drive and soft start technology, effectively reducing impact. Combined with Weihua’s world-leading electrical anti-sway and automatic positioning control system, it enables平稳 lifting of heavy components and millimeter-level precise alignment, ensuring construction safety and quality.

Safe, Reliable, and Fully Protected

The overall design incorporates a comprehensive safety concept, with sufficient safety margins for key structures. The operator’s cab is designed with a focus on personnel safety and operational comfort. Additionally, safety devices such as overload limiters and multiple limit switches can be equipped.

Strong Customization Capability

Weihua can provide customized solutions for road and bridge gantry cranes according to specific project requirements for span, lifting height, capacity, and construction processes.

Structural Composition

Weihua A-frame double-girder gantry crane for construction projects adopts a classic box-type or triangular truss structural design, achieving lightweight construction while ensuring high structural strength and good wind resistance. It mainly consists of the following systems:

Gantry Structure: Includes the main girder, legs, upper/lower end beams, and traveling bogies. The main girder often uses a triangular truss structure, offering high strength, light weight, and strong wind resistance. Legs can be box-type or steel pipe structures to ensure overall stability.
Hoisting Mechanism: The core is the trolley system, featuring a compact structure and light deadweight. Specifically designed for lifting large, heavy components like预制 beams and bridge decks, ensuring smooth and precise lifting.
Crane Travel Mechanism: Drives the entire crane longitudinally along rails laid on piers or the ground, operating smoothly and adapting to the complex conditions of construction sites.
Trolley Travel Mechanism: Drives the lifting trolley transversely along the main girder rails, enabling precise positioning of the load within the work area.
Operator’s Cab and Control System: Uses a closed operator’s cab, providing a safe and comfortable environment for the operator, equipped with adjustable seats, insulated flooring, tempered glass, and fire extinguishers. The control system ensures coordinated operation of all mechanisms and can integrate advanced anti-sway and positioning technologies.

Specifications

Item		Specification
Lifting Capacity (t)		40~100
Span (m)		20~40
Lifting Height (m)		9~12
	Main Hook	0.8~1
Speed (m/min)	Trolley Travel	10
	Crane Travel	13~15
Working Class		A5

Applications

Weihua A-frame double-girder gantry crane for construction projects primarily serves the fields of national infrastructure construction and heavy equipment hoisting.

Highway and Railway Bridge Construction: Used for hoisting and erecting预制 beams, as well as installing large bridge deck components.
Water Conservancy and Hydropower Projects: Serves the hoisting of dam gates, large pipelines, and other heavy hydraulic structures.
Large Building and Venue Construction: Used for lifting large steel structures, precast concrete components, etc.
Heavy Equipment Manufacturing and Installation: For handling and assembling large components in heavy machinery factories or equipment installation sites.

MH series truss-type gantry crane with electric hoist

cn_whcrane — Mon, 08 Dec 2025 02:32:33 +0000

The MH型 electric hoist gantry crane (truss type) is used in conjunction with electric hoists such as the CD₁ and MD₁ models. It is a medium and small-sized rail-mounted crane with a applicable lifting capacity of 3-16 tons and a applicable span of 12-30 meters. The working environment temperature ranges from -20°C to +40°C.
The MH型 hoist truss gantry crane is a general-purpose crane, mostly used for loading/unloading or grabbing materials in open-air sites and warehouses. This product comes in two types: ground control and cabin control.

Structural Composition

The metal structure of the MH型 electric hoist gantry crane (truss type) mainly includes:

Crane Travel Mechanism: Drives the entire crane to move longitudinally along the ground rails.
Main Girder: Adopts a truss structure welded from section steel. This structure effectively reduces the overall weight and helps to decrease wind resistance, enhancing stability when working in open-air environments.
Legs and Lower Crossbeam: Also made of steel structure, connected to the main girder to form the gantry. The main girder, legs, and lower crossbeam are usually connected using high-strength bolts, facilitating transportation and on-site installation.
Hoist Trolley: This refers to the matching electric hoist, which runs directly on the I-beam of the main girder’s lower flange and is responsible for lifting and transverse movement.

Electric Hoist Type Selection

The types of electric hoists installed on the MH型 electric hoist gantry crane are typically selected based on usage scenarios and requirements as follows:

CD₁/MD₁ Wire Rope Electric Hoist

Explosion-Proof Electric Hoist

Electric Chain Hoist

New Chinese Style Electric Hoist

CD₁ Electric Hoist: Single-speed lifting, simple structure, widely used.
MD型 Wire Rope Electric Hoist: Dual-speed lifting, including normal and low speeds, suitable for work environments requiring precise positioning.
Explosion-Proof Electric Hoist: Suitable for flammable and explosive environments such as the chemical industry, coal mines, and other industries.
Electric Chain Hoist: Suitable for small tonnage, light-duty working conditions, compact structure, and easy maintenance.
New Chinese Style Electric Hoist: High performance, low deadweight, frequency conversion design, smooth operation, commonly used in modern factories with higher requirements for efficiency and maintenance.

Advantages & Features

Lightweight, Cost-Effective

While ensuring strength, the truss structure is lighter than box girder structures, which can reduce requirements for rail foundations and manufacturing costs.

Strong Environmental Adaptability

Designed for temperature differences ranging from -20°C to +40°C, meeting the needs of outdoor operations in most parts of China.

Reliable Basic Functions

As a mature medium and small-sized crane, its design and manufacturing follow relevant industry standards, ensuring basic operational stability and safety.

Convenient Operation

Provides two common control modes: ground pendant control and cabin control, which can be flexibly chosen based on operational frequency and requirements.

Technical Specifications

Item	Unit	Parameters
Lifting Capacity	t	3	5	10	16
Span	m	12~24	12~30
Lifting Height	m	6, 9
Working Class	ISO	A4
Electric Hoist	Model	CD₁, MD₁
	Lifting Speed	8 / 0.8/8		7 / 0.7/7	3.5 / 0.35/3.5
	Travel Speed	20
Power Supply		3p 380V 50Hz or customized

Main Applications

Logistics & Warehousing: Various open-air stockyards, warehouses, and storage yards, used for loading/unloading steel, timber, packaged goods, etc.
Manufacturing & Infrastructure: Material transfer and equipment installation in small to medium-sized machinery workshops, building material processing yards, and construction sites.
Other Industrial Occasions: Suitable for general material handling scenarios without special extreme requirements for lifting capacity and functions.

Double-girder truss gantry crane

cn_whcrane — Mon, 08 Dec 2025 03:10:52 +0000

The double-girder truss gantry crane is a gantry crane utilizing a truss structure. Two parallel truss main girders form a rigid spatial frame through transverse connecting beams. The lifting trolley runs on rails between the two main girders. The double-girder design offers high load-bearing capacity and协同 load sharing, with lifting capacities exceeding 100 tons. This type of design effectively reduces deadweight and increases rigidity, making it particularly suitable for occasions with long spans and medium loads, such as power station construction, large equipment installation, and logistics yards.

Advantages & Features

Long Span & Economy

The truss structure is the preferred solution for achieving low-cost, long-span designs.

Efficient & Smooth Operation

Utilizes frequency conversion + PLC control, enabling slow speed under full load and fast speed under light load, with smooth lifting and travel, and low impact.

Safe & Reliable

Safety concepts are integrated into design details. Can be equipped with pin-type overload sensors, dual limit switches, and various safety protection devices.

High Level of Intelligence

Optional anti-sway system, intelligent spreaders, and digital management platform enable intelligent operation and remote monitoring.

Lightweight & Energy Saving

Inherits the lightweight design concept of New Chinese Style cranes, reducing deadweight and wheel load through structural optimization, thereby lowering load requirements for the plant or foundation and achieving energy savings.

Main Applications

Ports: Used for loading and unloading containers, cargo ships, etc., to improve logistics efficiency.
Shipbuilding Industry: For hull assembly, dismantling, and other operations, due to its ability to handle very heavy components.
Steel Industry: Suitable for handling, loading, and unloading large items such as steel plates and sections.
Water Conservancy Projects: Includes handling heavy equipment and materials during the construction and maintenance of dams, channels, etc.
Mines: Used for transporting, loading, and unloading resources such as ore and coal.

Shield gantry crane

cn_whcrane — Mon, 08 Dec 2025 09:03:46 +0000

The gantry crane for shield tunneling is a specialized lifting device specifically used in tunnel engineering, particularly for subway shield construction. Its main task is to be responsible for the safe lifting and transfer of large shield machine components, segments, muck, and other construction materials on the construction site.

The gantry crane for shield tunneling is mainly used for the installation of the cutterhead and shield body of the trenchless shield machine, as well as the lifting of tunnel support segments during construction.
It adopts a special spreader that can rotate 360°, suitable for installing the cutterhead at different angles.
It adopts a double-trolley structure. The two trolleys can be linked for lifting the cutterhead or operate independently for lifting segments.
The hoisting mechanism uses open gear drive, saving costs.

This type of crane needs to meet the following core requirements:

High safety requirements: The lifted objects are of high value, and the operating space is relatively fixed and narrow.
Complex working conditions: Adapts to the多变 environment of construction sites, often requiring outdoor or semi-outdoor operation.
High efficiency requirements: Needs to efficiently coordinate with the continuous operation process of shield construction.

As a leading crane manufacturer in China, Weihua possesses manufacturing qualifications for over 200 types in 10 major series and is capable of providing highly customized gantry crane solutions based on the special working conditions of shield construction.

Features & Advantages

Customized Safety Design

Targeting the high-risk environment of shield construction, safety concepts are integrated from structural design to the control system. Key mechanisms (such as the hoisting mechanism) are designed with extra-long life and large safety margins to cope with extreme 24/7 operating conditions.

Intelligent Monitoring System

Can be equipped with a crane full lifecycle safety management monitoring system for real-time equipment status monitoring and early warning.

Precise Anti-Sway & Positioning

Weihua’s independently developed electrical anti-sway control technology is internationally领先, ensuring that when lifting precision and expensive shield components, operations are fast, accurate, and stable, achieving millimeter-level precise positioning.

Smooth & Efficient Operation

Each mechanism uses variable frequency speed regulation and PLC control, resulting in smooth start/stop and low impact, effectively protecting the lifted load and the equipment itself.

Sturdy Structure

The crane travel mechanism adopts a special design to ensure that even on potentially uneven tracks at the construction site, all wheels maintain uniform force and stable operation.

High Reliability Design

The high-reliability design of core components ensures long-term stable operation of the equipment in relatively harsh construction environments with dust and moisture.

Specifications

Lifting Capacity (t)			400	200+200	100+100	100	130
Span (m)			33/34			20;22;24
Lifting Height (m)			24 (above rail) 23 (below rail)	24 (above rail) 24 (below rail)	1.5 (above rail) 21 (below rail)	9.8 (above rail) 30 (below rail)
Speed (m/min)	Hoisting	Main Hoist	0.09~0.9	0.09~0.9	0.3~3~6	0.37~3.7~6
		Auxiliary Hoist	7	7	~	~
	Travel	Crane Travel	1.16~16	1.16~16	2~20	1.4~14
		Trolley Travel	1.15~11.5	1.15~11.5	2.5~25	2.5~25
Working Class	A4

Applications

Weihua’s gantry cranes for shield tunneling are core lifting equipment专门 serving the following fields:

Urban Rail Transit Construction: Used for the assembly and disassembly of shield machines in subway tunnels, as well as the lifting of tunnel segments and construction materials.
Railway & Highway Tunnel Engineering: Used for shield construction in large tunnel projects such as mountain tunnels and underwater tunnels.
Large Underground Utility Tunnels: Used for lifting shield equipment during the construction of urban underground utility tunnels.
Other Underground Space Development: Suitable for various underground projects constructed using the shield method.

Self-lifting gantry crane

cn_whcrane — Mon, 08 Dec 2025 10:24:17 +0000

Weihua self-erecting gantry crane is a special type of gantry crane utilizing segmented legs and jack-up technology. It is specifically designed for narrow or complex sites inaccessible to large mobile cranes, enabling rapid installation and adjustable height, and is widely used in various industrial fields.

The self-erecting gantry crane has a gantry structure similar to a traditional U-type gantry crane, with the core difference lying in the leg design. To adapt to special work sites where large mobile cranes cannot enter, its legs are manufactured in multiple segments, each equipped with a jack-up support base. On-site, the trolley, main girder, and end carriages are assembled first. Then, the leg segments are gradually jacked up using jacks and fixed via flange connections. Finally, the bottom crossbeam and crane travel mechanism are installed. This design makes it particularly suitable for modular installation and dismantling in spaces with limited access.

Features & Advantages

Modular Installation & Dismantling

Segmented legs and bolted connections of structural components allow for on-site assembly in locations inaccessible to large mobile cranes, facilitating easy installation and dismantling.

Adjustable Height & Flexible Movement

The self-erecting function of the legs allows for rapid height adjustment on-site to suit different operational stages; equipped with traveling wheels for flexible movement within the site, reducing the need for repeated installation.

Intelligent Control, Safe & Reliable

Utilizes fully digital AC variable frequency drive and PLC control for high-precision positioning and smooth operation. Key mechanisms have ample safety margins and are equipped with comprehensive protection devices such as overload limiters and limit switches to ensure operational safety.

Wide Adaptability & Customization

Lifting capacity typically ranges from 5t to 100t, span from 10m to 50m, lifting height from 10m to 60m, and working class A3~A6, customizable according to requirements.

Structural Composition

Component	Description
Gantry	U-type gantry structure welded from high-strength steel, ensuring good stability and load-bearing capacity.
Legs	Unique segmented design, each segment equipped with a jack-up support base, enabling on-site self-erecting assembly and height adjustment.
Main Girder & End Carriages	Pre-assembled together with the trolley, forming the upper main structure of the crane.
Crane Travel Mechanism	Drives the entire crane longitudinally along the ground rails, typically using multi-wheel drive for smooth operation.
Trolley & Hoisting Mechanism	The trolley travels transversely along the main girder rails and is equipped with a hoisting mechanism responsible for lifting and lowering the load.
Electrical System	Utilizes fully digital AC variable frequency technology and PLC control system for high-precision operation.

Applications

The self-erecting gantry crane is widely used in industries such as machinery, metallurgy, mining, electric power, railways, ports, petroleum, and chemical engineering. Specific scenarios include:

Construction: Material lifting and equipment installation for high-rise buildings.
Bridge Construction: Lifting and handling of prefabricated components.
Large Equipment Installation: Hoisting of large equipment in factories, power stations, etc.
Special Confined Sites: Locations difficult for large mobile cranes to access, such as interior renovations or expansions of old factories.

Bridge launcher

cn_whcrane — Mon, 15 Dec 2025 06:10:00 +0000

Weihua bridge erection gantry is a large-scale specialized construction equipment designed specifically for bridge construction projects such as highways and railways. It is primarily used to safely, efficiently, and precisely erect precast box girders or T-beams on construction sites. It integrates Weihua’s technological expertise in heavy structural design, high-precision motion control (anti-sway and automatic positioning), and equipment intelligence. It is designed to meet the stringent requirements of large tonnage, high precision, and high safety in modern bridge construction.

The WH-JQJH 900t bridge erection gantry is mainly composed of the main beam, cantilever beam, lower guide beam, front and rear legs, auxiliary legs, girder lifting trolley, cantilever hoist, and electro-hydraulic system. It is suitable for erecting single-span simply supported beams of three different span lengths, offering high operational efficiency.

This type of bridge erection gantry can erect straight and curved (R>2000m) lines, with longitudinal slopes <20, for 20m, 24m, 32m equal spans, variable spans, and full-span prestressed concrete box girders. In addition to standard bridge erection operations, it can also handle tasks such as first/last span erection, curved erection, variable span erection, spanning continuous beams, composite beams, continuous rigid frames, existing bridge erection, and simply supported to continuous span erection. It offers advantages including simply supported erection, fixed-point lifting, good stability during girder lifting, high operational efficiency, safety and reliability, convenient span adjustment, and ease of operation.

Advantages & Features

Higher Load Capacity

Large tonnage design: Leveraging experience in heavy equipment manufacturing to meet the erection needs of large, heavy precast beams. Capable of undertaking key beam erection tasks for major bridge projects.

Higher Precision

Millimeter-level precision beam placement: Applies high-precision anti-sway and automatic positioning technology to achieve smooth lifting and accurate positioning of beams. Improves construction quality and safety, reduces adjustment time, and accelerates project progress.

More Intelligent

Intelligent collaborative control: Utilizes an intelligent control system to ensure synchronized and smooth operation of multiple mechanisms (e.g., hoisting, traveling). Reduces operational difficulty and enables efficient, collaborative streamlined operations.

More Reliable

Robust and durable design: Key structures are optimized through analysis, using high-strength materials and stringent manufacturing processes (e.g., automatic welding, integral machining). Results in low equipment failure rates, long-lasting durability, ensuring continuity in long-term, high-intensity construction.

More Economical

Lightweight and modular: Structural optimization reduces deadweight; modular design facilitates transportation, relocation, and assembly. Reduces equipment and relocation costs, improves utilization rate, offering higher comprehensive benefits.

Applications

Weihua bridge erection gantries primarily serve key areas of national infrastructure construction:

High-Speed Railway & Passenger Dedicated Line Construction: Used for erecting railway box girders with high standards and heavy weight.
Highway & Municipal Bridge Construction: Suitable for erecting precast beams for various highway bridges.
Large River-Crossing & Sea-Crossing Bridge Projects: Serves the approach bridges or specific sections of mega bridges for beam erection tasks.

Weihua products have long served key national projects such as the “West-to-East Gas Pipeline,” “South-to-North Water Diversion,” and “Hangzhou Bay Bridge”, and have been successfully used in high-precision lifting tasks at the country’s four major satellite launch bases. This fully demonstrates its strong capability to undertake major national projects and provide highly reliable equipment. Its bridge erection gantries can be seen as an extension of this technical strength into the field of bridge construction.

Girder lifting machine

cn_whcrane — Mon, 15 Dec 2025 03:58:15 +0000

The girder hoisting crane is a type of gantry crane specifically designed for bridge construction. These cranes can operate in two modes: two units working together to lift a prefabricated beam, or a single unit equipped with a double spreader to lift the beam. The lifting capacity for each of the two cranes used in tandem is typically 450 tons, while a single crane used independently can often reach a capacity of 900 tons. Equipped with mechanisms for leg travel, trolley travel, and trolley hoisting, it enables fully mechanized operation in all directions.

It can either be used as two units working in tandem to lift prefabricated beams, or as a single unit equipped with a double spreader for lifting. Its main applications include:

Transporting prefabricated beams from the casting bed to the storage location.
Hoisting the cured prefabricated beams from the storage area onto the beam transport vehicle.
Acting as lifting equipment to assist in the assembly and disassembly of the bridge launching gantry.
Erecting viaducts or bridges with low pier heights.

The main structure of the girder hoisting crane can be divided into the following major parts:

Assembled Main Girder: The core load-bearing structure, using forms like box girders to meet strength, rigidity, and stability requirements.
Legs: Support the entire crane and can travel on rails, enabling longitudinal movement.
Trolley System: Includes the crane travel mechanism, trolley travel mechanism, and hoisting mechanism, responsible for the transverse movement and vertical lifting of the load.
Electrical Control System: Acts as the “neural center,” encompassing all electrical components for drive, control, and safety protection.
Safety Protection Devices: Includes overspeed protection, overload limiters, various limit switches, and emergency braking systems.

Features & Advantages

Applications

Due to its powerful lifting capacity and specialized design, Weihua girder hoisting cranes are mainly used in the following scenarios:

Core Application Field: Lifting, erection, and construction of prefabricated beams for various railway and highway bridges.
Wide Industrial Fields: The product is also widely used in numerous industries requiring heavy lifting, such as machinery, metallurgy, mining, electric power, railways, ports, petroleum, and chemical engineering.

Girder transporting machine

cn_whcrane — Mon, 15 Dec 2025 05:47:21 +0000

Weihua’s Girder Transporting Machine is mainly used in bridge prefabrication yards. It is specifically responsible for safely and smoothly transferring heavy precast concrete girders from the casting bed to the storage area or onto a girder transport trailer.

Equipped with a specialized spreader, it is mainly used for the loading, unloading, and transfer of large bridge girders.
The crane travel mechanism can achieve a 90º rotation, making it suitable for multi-span use.
The hoisting system utilizes a four-point lifting with three-point balance principle to ensure even force distribution on the wire ropes.
The trolley employs a hydraulic push rod device, enabling the lifting and transport of various bridge girders while also saving costs.

Although the specific design of Weihua’s Girder Transporting Machine may vary, its core typically includes several systems listed in the table below:

Component	Main Function & Technical Key Points
Crane Travel Device	Drives the entire machine longitudinally along rails laid on the ground. Typically uses multi-wheel bogies and motor drives.
Hoisting Device	Responsible for lifting and lowering the precast girders. Usually employs a large-tonnage (e.g., 320-ton class) synchronized jack system to ensure smooth lifting and lowering of the girder.
Support Frame Structure	The main steel structure that bears the weight of the girder. Typically consists of two main girders and connecting crossbeams, forming a stable load-bearing platform.
Electrical Control System	The “brain” of the machine. Controls the coordinated operation of all mechanisms, especially ensuring the high-precision synchronization of multiple jacks during lifting and lowering, which is crucial for ensuring safety.

Features & Advantages

High Reliability & Safety

As special lifting equipment, its design strictly follows safety codes. Key components, such as hydraulic and electrical systems, have ample safety margins.

Strong Load Capacity

To meet the handling demands of heavy precast girders (up to thousand-ton class), its structural design and component selection are tailored to satisfy large-tonnage, high-strength operational requirements.

Precise Synchronous Control

Advanced electronic control systems ensure synchronous operation of multiple lifting points, preventing the girder from being twisted or cracked during transport.

High Degree of Automation

May integrate functions such as automatic positioning and path planning, reducing reliance on operator experience and improving operational efficiency and consistency.

Applications

Due to its powerful lifting capacity and specialized design, Weihua’s Girder Transporting Machine is mainly used in the following scenarios:

Core Application Field: Hoisting, erecting, and construction of precast girders for various railway and highway bridges.
Wide Industrial Application: The product is also widely used in numerous industries requiring heavy lifting, such as machinery, metallurgy, mining, electric power, railways, ports, petroleum, and chemical engineering.