Semi-Gantry Crane 1-20 Ton | Single Leg Gantry Crane with CD/MD Hoist
Short Video Description
This video shows a semi-gantry crane with single girder design for economical material handling in workshops, factories and warehouses. The crane is available from 1 ton to 20 ton and can be equipped with a CD or MD electric wire rope hoist according to lifting capacity, lifting height and working frequency.
The single leg gantry crane, also called a single leg semi-gantry crane, uses one side supported by an existing building structure or elevated runway while the other side travels on a ground rail. This configuration can reduce structural requirements compared with a full gantry crane and is an economical solution for indoor material handling.
A single girder semi-gantry crane can be designed with a CD type single-speed wire rope hoist or MD type double-speed wire rope hoist. The MD hoist provides more flexible lifting and positioning for applications requiring two lifting speeds.
For a 1–20 ton semi-gantry crane, the main technical parameters include lifting capacity, span, lifting height, rail gauge, travelling distance, duty class, headroom, hoist type, power supply and existing building structure. Yuantai Crane reviews these parameters together before selecting the final crane configuration.
Main Technical Specifications
| Item | Technical Specification |
|---|---|
| Crane type | Semi-Gantry Crane / Single Leg Gantry Crane / Single Girder Semi-Gantry Crane |
| Rated capacity | 1 – 20 ton, customized according to lifting requirements |
| Girder design | Single welded girder or I-beam girder, selected according to capacity, span and duty class |
| Gantry structure | Single leg gantry structure with the opposite side supported by an elevated runway or building structure |
| Span | 5 – 25 m, customized according to workshop layout |
| Lifting height | 3 – 15 m, customized according to required hook height |
| Hoisting system | CD electric wire rope hoist / MD electric wire rope hoist |
| CD wire rope hoist | Single-speed electric wire rope hoist for economical general material handling |
| MD wire rope hoist | Double-speed electric wire rope hoist for smoother lifting and positioning |
| Hoisting speed | 3 – 12 m/min, single speed, two speed or VFD according to hoist type |
| Trolley speed | 20 – 30 m/min, customized |
| Crane travelling speed | 20 – 30 m/min, VFD available |
| Duty class | ISO A3 – A5 / FEM 1Am – 2m, selected according to working frequency |
| Rail gauge | 3 – 15 m, customized according to ground rail and building layout |
| Travelling distance | 10 – 200 m+, customized according to workshop layout |
| Control | Pendant / Radio Remote / optional cabin according to application |
| Power supply | 380V / 50Hz / 3Ph standard; 400V, 415V, 440V, 460V and 60Hz available |
| Safety devices | Overload limiter, lifting limit switch, travelling limit switch, emergency stop, buffers and warning alarm |
| Working environment | Indoor workshops, factories, warehouses, production lines and maintenance areas |
| Working temperature | Typically -20°C to +40°C, customized for special environments |
| Economical solution | Single girder structure, single leg support and CD/MD wire rope hoist can reduce unnecessary structural and equipment costs for suitable applications |
| Applications | Machine shops, fabrication workshops, warehouses, maintenance areas, assembly lines, production plants and general indoor material handling |
| Yuantai Crane engineering experience | Yuantai engineers the single girder, single gantry leg, end carriage, CD/MD hoist, wheels, ground rail and building connection as one complete semi-gantry crane system. |
Single Girder Semi-Gantry Crane with CD/MD Wire Rope Hoist
The CD wire rope hoist is commonly selected when a simple and economical lifting solution is required. It is suitable for general workshop material handling where a single lifting speed is sufficient.
The MD wire rope hoist provides two lifting speeds and is useful when operators need slower lifting for more accurate load positioning. It can be a practical choice for machinery assembly, maintenance and production applications requiring better positioning control.
Yuantai Crane selects the CD or MD electric wire rope hoist according to lifting capacity, lifting height, working frequency, required lifting speed and budget.
FAQ: Single Leg Semi-Gantry Crane with CD/MD Wire Rope Hoist
Common questions about 1 to 20 ton semi-gantry cranes, single girder designs, single leg gantry cranes and economical CD/MD wire rope hoist solutions.
1. What is a single leg gantry crane?
A single leg gantry crane is a semi-gantry crane with one ground-supported gantry leg. The opposite side of the main girder is supported by an elevated runway, building column or existing structure.
This configuration is useful when a workshop already has a suitable overhead structure and only one ground travelling side is required.
2. What is the difference between a semi-gantry crane and a full gantry crane?
A full gantry crane has two ground-supported gantry legs, while a semi-gantry crane has one ground-supported side and one side supported by an elevated runway or building structure.
A semi-gantry design can be more economical when an existing building structure can safely support the crane runway.
3. Should I choose a CD or MD wire rope hoist?
Choose a CD wire rope hoist when a simple and economical single-speed lifting solution is sufficient. Choose an MD wire rope hoist when two lifting speeds and better load positioning are required.
Yuantai Crane selects the hoist according to capacity, lifting height, working frequency, lifting speed and operating requirements.
4. Is a single girder semi-gantry crane an economical solution?
Yes, when the application is suitable. A single girder semi-gantry crane can reduce structural requirements because one side uses an existing elevated runway or building structure.
A CD wire rope hoist, optimized single girder and simple control system can further reduce the equipment cost while maintaining the required lifting performance.
5. Can a single leg gantry crane lift 20 tons?
Yes. A 20 ton single leg semi-gantry crane can be engineered when the building structure, ground rail, girder, gantry leg, wheels and foundation can safely support the calculated loads.
For heavier capacities, Yuantai engineers check the building-side runway reactions, wheel loads, structural strength and stability before confirming the final design.
6. What information is needed for a 1 to 20 ton semi-gantry crane quotation?
Provide the lifting capacity, span, lifting height, ground rail gauge, travelling distance, working frequency, available building structure, headroom, power supply and required hoist type.
If CD or MD hoist selection is required, also provide the required lifting speed and positioning accuracy. A workshop drawing is useful for checking the building-side support and crane installation dimensions.
7. What experience does Yuantai Crane have with semi-gantry cranes?
Yuantai Crane has engineering and manufacturing experience with single girder semi-gantry cranes, single leg gantry cranes, workshop gantry cranes and CD/MD electric wire rope hoist systems.
For each project, Yuantai engineers review the single girder, single gantry leg, building connection, CD/MD hoist, end carriage, wheels, ground rail and electrical system according to the actual site conditions.
Need a 1 to 20 Ton Economical Semi-Gantry Crane?
Send us your lifting capacity, span, lifting height, headroom, ground rail gauge, travelling distance, working frequency, building structure and hoist requirements.
Yuantai Crane can engineer a 1 ton to 20 ton single girder semi-gantry crane or single leg gantry crane with CD or MD electric wire rope hoist for economical indoor material handling.
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Article by Bella ，who has been in the hoist and crane field since 2016. Bella provides overhead crane & gantry crane consultation services for clients who need a customized overhead travelling crane solution.Contact her to get free consultation.
Yuantai Cranes
Yuantai Cranes - Global Material Handling Crane Solution Provider & Manufacturer with CE, ISO, SGS, CNEX and other Third Party Certifications.
- Main Specifications - Capacity: 0.5–550 tons | Span: up to 40m | Speed: 0.8–12 m/min | Duty: A3–A7 | Power: 380–690V, 50/60Hz | Control: pendant/remote/cabin
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- Crane type:_____ . (e.g., overhead crane, gantry crane, jib crane)
- Max weight to lift:_____ tons. (e.g., 2t, 5t, 10t, 20t, 50t)
- Lifting height:_____ m. (How high does the hook need to reach?
- Workshop width (span):_____ m . (Distance between the two crane rails)
- Travel distance:_____ m . (How long does the crane need to move along the runway?)
- Control type:_____. (Pendant / remote / cabin Control)
- Power supply:_____. (Local voltage & frequency – e.g., 380V, 50Hz, 3-phase)
- What will it be used for?_____ (e.g., steel fabrication, concrete products, mold handling, general manufacturing, etc.)
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