Gantry crane

Product Overview

The Weiyuan Universal Semi-Gantry Crane is a powerful, heavy-duty lifting solution that offers a smart and economical alternative to full gantry cranes. This mature and proven design features a robust winch trolley, making it suitable for high capacities and demanding work cycles. One side of the crane runs on an elevated gantry rail, typically mounted on a building’s structure, while the other side travels on a ground-level rail. This innovative configuration is perfect for outdoor freight yards, workshops, and areas where a full gantry span is unnecessary, saving both space and significant structural cost.

Product Advantages

Robust, Heavy-Duty Performance
Engineered with a strong, rigid steel structure and a large safety margin, this crane is built for durability. The classic winch trolley hoisting mechanism is designed for high-capacity lifts and demanding work cycles (A3-A8), ensuring reliable performance in the toughest industrial applications.

Cost-Effective and Space-Saving Design
By utilizing an existing building structure for one runway, the semi-gantry design eliminates the cost of a full gantry leg and ground rail on one side. This not only reduces initial investment but also maximizes usable floor space along the wall, offering a highly efficient footprint.

Versatile Structural Options
Weiyuan offers customizable designs to meet specific operational needs. The main girder and leg structure can be built in a classic A-frame style for stability or a U-frame style to allow the trolley to travel between the legs, maximizing hook access for large loads. The crane can also be equipped with single or double cantilevers to extend the work area.

Comprehensive Safety and Reliability
Safety is a top priority. The crane is equipped with a complete range of protection devices, including overload limiters, travel limit switches, and emergency stops. The proven design of the drive systems ensures reliable operation and good maintainability.

Flexible Operation and Control
Choose the control method that best suits your workflow and safety requirements. Options include ground-based pendant control, a fully enclosed operator’s cabin for comfort and protection in harsh environments, or a wireless remote control that provides the operator with excellent visibility and freedom of movement.

Intelligent Feature Compatibility
Bring your lifting operations to the next level by integrating Weiyuan’s advanced intelligent functions. Options include electric anti-sway control for stable and precise load positioning, regional work zone limiting for enhanced safety, and wireless connectivity to the Weiyuan Crane Industrial Internet Platform for remote diagnostics and asset management.

Application Scenarios

Outdoor Freight Yards and Storage
An ideal solution for lifting heavy materials in stockyards adjacent to a building. It provides extensive coverage without obstructing the entire yard with two ground rails. The cantilever option is perfect for loading and unloading trucks.

Heavy Fabrication and Manufacturing
Used in large workshops for handling heavy raw materials, large fabrications, and assembled products, especially where lifting is concentrated along one side of the bay.

Power Plants and Utilities
Well-suited for maintenance and material handling tasks in power generation facilities, where heavy components need to be moved in areas adjacent to the main plant structure.

Precast Concrete and Construction Yards
The high capacity and robust design make it perfect for handling heavy precast concrete segments, steel structures, and other large construction materials.

Product Specifications and Dimensions

Specification	Parameters
Product Name	Universal Semi-Gantry Crane
Lifting Capacity	5t – 320t
Span	5m – 50m
Lifting Height	5m – 30m
Work Level Classification	A3 – A8
Lifting Mechanism	Winch trolley
Operation Modes	Ground control, cabin control, remote control

Features at a Glance

✓ Heavy-Duty Capacity: Lifts from 5t up to 320t.
✓ High Duty Cycles (A3-A8): From light maintenance to severe industrial use.
✓ Space and Cost-Saving: Utilizes building structure to reduce footprint and cost.
✓ Durable Winch Hoisting: Classic design for reliability and power.
✓ Customizable A-Frame or U-Frame: Designed for your specific application.
✓ Comprehensive Safety Systems: Ensures safe and reliable operation.
✓ Smart-Ready: Can be upgraded with intelligent controls and remote monitoring.

FAQ

Q: What is the main difference between an A-frame and a U-frame semi-gantry crane?
A: An A-frame leg structure provides excellent stability and is a very common, robust design. A U-frame structure has a large opening between the support legs, which allows the load and trolley to pass through. This is particularly useful for handling very large or oddly shaped items that need to be moved to the very end of the crane’s span.

Q: What kind of foundation is required for the ground-level rail?
A: The ground-level side of the crane runs on a steel rail that must be installed on a suitable concrete foundation. The size and specifications of the foundation depend on the crane’s capacity and the ground conditions. Weiyuan provides detailed foundation loading information to ensure proper civil engineering work is done.

Q: Why choose a winch trolley over an electric hoist for a semi-gantry crane?
A: A winch trolley is chosen for applications requiring higher capacities (typically over 20 tons), higher lifting heights, faster speeds, or more demanding duty cycles (A5 and above). Winches are more robust and custom-built for heavy, continuous industrial service, offering greater durability than standard electric hoists.

Q: What do the work duty classifications A3-A8 mean?
A: This classification defines the intensity of use the crane is designed for. A3 is for light, infrequent use. A5-A6 is for general manufacturing and heavy use. A7-A8 is for severe, high-frequency, near-continuous use, like in a busy port or steel yard. Selecting the correct duty class is essential for the crane’s safety and service life.

Q: Can this crane operate both indoors and outdoors?
A: Yes. The semi-gantry design is extremely popular for outdoor applications but works just as well indoors, especially in large facilities where it can share an existing overhead crane runway along a wall, providing a cost-effective secondary lifting solution for that bay.