Zomax single girder underslung cranes are designed for optimal use in factory buildings without load-bearing columns, utilizing the roof structure as a support. With tracks mounted directly to existing ceilings, there's no need for additional columns.
Standard capacities reach up to 10 tons, with customizable spans and configurations. For specialized applications, Zomax offers tailored solutions handling up to 32 tons, ensuring reliability across industries.
To install underslung cranes, the roof structure must be able to withstand the combined load of the crane and the hanging load. So, To avoid any inconvenience, we recommend consulting with our engineering team to ensure that every detail is carefully evaluated.
Our underslung overhead travelling cranes optimize available building width through very small side approach dimensions and custom-engineered main girder cantilevers.
The single girder underslung crane is a lightweight and versatile lifting solution. It’s easy to install on a movable I-beam, which helps save valuable space in the workshop. Thanks to the smoother H-type mobile track, it reduces wear and tear on the crane wheels and extends their service life. The crane wheels run along the bottom flange of the track beam or rail, while the hoist or trolley wheels travel on the underside of the bridge or track.
Single girder underslung cranes are highly effective in solving several operational and structural challenges
Maximizing Floor Space:
By suspending the crane track from the ceiling, the single girder underslung crane maximizes the usable floor space. This is ideal for facilities where floor area is limited or when the space needs to remain flexible for other operations. It also reduces the need for floor-mounted supports, allowing for unobstructed movement of materials or equipment.
Utilizing Existing Structural Elements:
The crane utilizes the existing ceiling girder to increase the safety and stability of the crane track. This can be especially valuable in older buildings or facilities where adding additional support columns might be impractical or too costly.
Non-Parallel or Irregular Columns:
In situations where the side columns are non-parallel or cannot accommodate support brackets, the single girder underslung crane provides a solution. The crane’s design allows it to be flexible in terms of the structural layout of the building, overcoming the challenges of uneven or non-parallel columns that would otherwise complicate traditional overhead cranes.
Excessive Building Width:
For buildings with excessive width that exceeds the span of a traditional crane, this crane type can cover longer spans with ease. With up to 4 runway beams supporting the system, it can be adapted to meet the needs of wider buildings while maintaining high operational efficiency.
Multiple Cranes in the Same Bay:
When multiple cranes are required to operate independently in the same bay, the single girder underslung crane can handle this scenario. Its design allows for smooth operation in shared spaces, ensuring that each crane operates without interference from the others, even in confined areas.
Maximizing Side Approach:
In cases where the crane needs to approach the side walls as closely as possible (maximum side approach), this crane provides an optimal solution. The underslung design allows for efficient and close-to-wall movement, improving accessibility and space usage.
Lightweight and Easy Operation:
With a lighter bridge beam and optimized crane design, the system minimizes weight while maintaining strength, making it easier to operate, especially in wide bays. This makes the crane suitable for situations where minimal structural interference is necessary and where ease of use is a priority.
Customized Solutions for Varied Capacities:
The single girder underslung crane can be customized to handle different load capacities, ranging from 2 tons up to 32 tons, depending on the needs of the facility. Whether it's a small fabrication shop or a large assembly plant, the crane can be designed to match the specific lifting requirements.
Cost Efficiency and Space Optimization:
Since the system uses fewer materials for the crane structure compared to larger, more complex cranes, it is cost-effective. The crane's design ensures that it can operate efficiently without unnecessary bulk, making it an excellent solution for operations seeking high productivity while optimizing space and cost.
Single girder with under running Configuration
Crane track suspended from ceiling: maximizes usable floor space
Using the existing ceiling girder to increase the safety and stability of crane track
Lifting or transporting materials along with a fixed path: providing convenience and efficiency for production processes
Easily manipulate even in wide bay, minimizing the depth of bridge beam, and using lighter lifting equipment for easy operation
Box-type structure or high-quality I-steel and U-shaped groove
2, 3 or even 4 runway beams to support longer span crane system
| Lifting capacity | Up to 10 tons |
| Lifting height | Up to 30m |
| Span | Up to 16m |
| Rated voltage： | 220V/380V/400V/415V/660V, 50-60Hz, 3ph AC |
| Working class | A3.A4 |
| Temperature | Standard temperature: -20°C … +40°C. |
| Protection | IP54 |
| Crane type | Single girder, under running |
| Girder design | box-type structure or high-quality I-steel and U-shaped groove |
| Rope | Steel wire rope |
| Hoisting motor | Lifting: single-speed or double speedTravelling: double speed |
| Paint | One coat of primer and two coats of topcoat, total thickness exceeding 105µm |
| Trolley type | Electric wire rope hoists |
| Control options | Pendant / remote |
| Environment | Indoors and outdoors |
| protection devices | Anti-collision, sound and light alarm devices, Circuit self-check protector, Flow phase lack protection, etc. |
Compact and well-designed structure, high rigidity
Well-suited for for low and complex building conditions.
Optimal side approach dimensions maximize available building width.
Cost and Space Efficiency
Enhanced Headroom Utilization
All-around guidance on installation and maintenance.
Advanced technology and reasonable design
Aesthetically Pleasing and Robust Structure: visually appealing design combined with a strong steel structure, ensuring both durability and an attractive appearance
Main Girder: Two types—one uses I-beam and channel for small loads, the other uses U-shaped steel and I-beam for heavy loads.
Traveling Mechanism: Includes trolley and crane travel systems. The hoist and crane move independently, powered by soft-start squirrel cage motors with disc brakes. Speed: 20 or 30 m/min.
Hoisting Mechanism: Uses a high-torque conical rotor squirrel cage motor with a disc brake. Equipped with a CD/MD electric wire rope hoist.
Control System: Includes an electrical cabinet, remote control, or console for lifting, movement, and stopping operations.
Safety Devices: Limit switches and overload protection ensure safe operation by preventing overloading and stopping the crane at designated positions.
Our under-running cranes are the ideal solution for assembly plants, fabrication shops, maintenance areas, and manufacturing facilities. These single girder underslung cranes are expertly designed to lift loads of up to 10 tons, with the flexibility to customize configurations for specific applications, enabling capacities of up to 32 tons. Zomax specializes in providing tailored solutions to meet the unique requirements of your operation, ensuring optimal performance and efficiency.
● Side Columns Cannot Accommodate Support Brackets: When one or both side columns cannot support gantry girders.
● Non-Parallel Side Columns: When side columns are not parallel, preventing uniform span maintenance across the bay.
● Excess Building Width: When the building's width significantly exceeds the required crane span.
● Multiple Cranes Required: When independent movement of multiple cranes is necessary within the same bay.
● Maximum Side Approach Needed: When maximum side approach to the sidewall is required.
Our experienced crane engineers is available to help you design the optimal single girder overhead crane system to your facility's needs, and also offer comprehensive after-sales support, ensuring your crane operates efficiently, stably and reliably over time.
Maximizing Floor Space:
By suspending the crane track from the ceiling, the single girder underslung crane maximizes the usable floor space. This is ideal for facilities where floor area is limited or when the space needs to remain flexible for other operations. It also reduces the need for floor-mounted supports, allowing for unobstructed movement of materials or equipment.
Utilizing Existing Structural Elements:
The crane utilizes the existing ceiling girder to increase the safety and stability of the crane track. This can be especially valuable in older buildings or facilities where adding additional support columns might be impractical or too costly.
Non-Parallel or Irregular Columns:
In situations where the side columns are non-parallel or cannot accommodate support brackets, the single girder underslung crane provides a solution. The crane’s design allows it to be flexible in terms of the structural layout of the building, overcoming the challenges of uneven or non-parallel columns that would otherwise complicate traditional overhead cranes.
Excessive Building Width:
For buildings with excessive width that exceeds the span of a traditional crane, this crane type can cover longer spans with ease. With up to 4 runway beams supporting the system, it can be adapted to meet the needs of wider buildings while maintaining high operational efficiency.
Multiple Cranes in the Same Bay:
When multiple cranes are required to operate independently in the same bay, the single girder underslung crane can handle this scenario. Its design allows for smooth operation in shared spaces, ensuring that each crane operates without interference from the others, even in confined areas.
Maximizing Side Approach:
In cases where the crane needs to approach the side walls as closely as possible (maximum side approach), this crane provides an optimal solution. The underslung design allows for efficient and close-to-wall movement, improving accessibility and space usage.
Lightweight and Easy Operation:
With a lighter bridge beam and optimized crane design, the system minimizes weight while maintaining strength, making it easier to operate, especially in wide bays. This makes the crane suitable for situations where minimal structural interference is necessary and where ease of use is a priority.
Customized Solutions for Varied Capacities:
The crane can be customized to handle different load capacities, ranging from 2 tons up to 32 tons, depending on the needs of the facility. Whether it's a small fabrication shop or a large assembly plant, the crane can be designed to match the specific lifting requirements.
Cost Efficiency and Space Optimization:
Since the system uses fewer materials for the crane structure compared to larger, more complex cranes, it is cost-effective. The crane's design ensures that it can operate efficiently without unnecessary bulk, making it an excellent solution for operations seeking high productivity while optimizing space and cost.
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