Low Headroom Double Girder Overhead Crane | Suspended Crab Hoist Trolley
Short Video Description
This video shows a low headroom double girder overhead crane equipped with a suspension CD/MD electric crab hoist trolley designed for workshops requiring higher lifting height and better space utilization.
Unlike traditional double girder cranes where the hoist trolley runs on the top of the bridge girder with the hoist installed above the girder level, this design uses a trolley frame mounted on the top of the double girder, while the electric wire rope hoist is suspended under the trolley frame.
This compact arrangement reduces the vertical space occupied by the hoisting system and increases the available hook lifting height under the same building height. It is an effective solution for low clearance workshops, factories and production buildings.
The crane can be configured with CD type or MD type electric crab hoist trolley. The hoist selection depends on lifting speed, working frequency, positioning accuracy and application requirements.
The low headroom double girder overhead crane provides advantages in both cost saving and space saving by improving the utilization of existing workshop height without major building modifications.
Low headroom double girder overhead crane with suspended crab hoist trolley
Main Technical Specifications
| Item | Technical Specification |
|---|---|
| Crane type | Low Headroom Double Girder Overhead Crane / Suspended Crab Hoist Bridge Crane |
| Rated capacity | 5 Ton – 80 Ton, customized according to application |
| Bridge design | Double girder overhead travelling crane with optimized low headroom trolley arrangement |
| Hoist trolley type | Suspension CD/MD Electric Crab Hoist Trolley |
| Trolley frame arrangement | Trolley frame mounted on top of double girder |
| Electric hoist position | Electric wire rope hoist suspended under trolley frame to increase effective lifting height |
| Main advantage | Higher hook height, reduced headroom requirement and better workshop space utilization |
| Span | 10 – 35 m+, customized according to building layout |
| Lifting height | 6 – 30 m+, customized according to required hook height |
| Hoisting system | CD single speed electric wire rope hoist / MD double speed electric wire rope hoist |
| Hoisting speed | 3 – 12 m/min, customized with single speed, double speed or VFD |
| Trolley travelling speed | 20 – 40 m/min, VFD available |
| Crane travelling speed | 20 – 40 m/min, customized |
| Duty class | ISO A5 – A6 / FEM 2M – 3M according to working frequency |
| Control | Pendant control / Radio remote / Operator cabin |
| Power supply | 380V / 50Hz / 3Ph standard; 400V, 415V, 440V, 460V and 60Hz available |
| Safety devices | Overload limiter, lifting limit switches, travelling limit switches, emergency stop, buffers and alarm system |
| Application | Steel fabrication, machinery workshops, assembly plants, warehouses, production lines and heavy industrial buildings |
| Yuantai Crane engineering experience | Yuantai engineers optimize the double girder structure, trolley frame, electric hoist position, lifting height and building clearance as one complete crane system. |
How Does the Suspended Crab Hoist Trolley Increase Lifting Height?
The key feature of this low headroom double girder overhead crane is the special trolley arrangement.
The crab trolley frame runs on the top of the double girder, while the electric hoist is suspended below the trolley frame. This design lowers the hoist position compared with conventional trolley configurations.
As a result, more vertical space is available between the crane runway and the lifting hook. This helps customers achieve a higher usable lifting height without increasing the workshop building height.
Traditional Double Girder Crane vs Low Headroom Suspended Crab Trolley Crane
| Item | Traditional Double Girder Crane | Low Headroom Suspended Crab Hoist Crane |
|---|---|---|
| Hoist position | Usually mounted above or between girder level | Hoist suspended under trolley frame |
| Headroom requirement | Higher vertical space required | Reduced headroom requirement |
| Lifting height | Limited by hoist and girder arrangement | Higher effective hook height |
| Workshop suitability | Standard industrial buildings | Low clearance workshops and height-limited buildings |
| Main benefit | Heavy-duty lifting capability | Space saving and improved height utilization |
Cost & Space Saving Benefits of Low Headroom Overhead Crane
A low headroom double girder overhead crane can reduce project costs by making better use of existing workshop space.
Instead of increasing building height or modifying the roof structure, the suspended crab trolley design provides additional hook height through optimized crane configuration.
For factories planning new workshops or upgrading existing facilities, this design can improve production space utilization and reduce unnecessary construction investment.
Applications of Suspended CD/MD Electric Crab Hoist Trolley Crane
This crane configuration is commonly used in:
- Steel fabrication workshops
- Machinery manufacturing plants
- Heavy equipment assembly areas
- Automotive production facilities
- Maintenance workshops
- Warehouses requiring higher hook height
- Industrial buildings with limited roof clearance
FAQ: Low Headroom Double Girder Overhead Crane
Common questions about suspended CD/MD electric crab hoist trolley, double girder bridge crane design, lifting height improvement and space-saving solutions.
1. What is a low headroom double girder overhead crane?
A low headroom double girder overhead crane is a bridge crane designed to maximize lifting height in buildings with limited vertical clearance.
It uses a special trolley arrangement where the trolley frame is installed on top of the double girder and the electric hoist is suspended underneath.
2. How does the suspended crab trolley improve lifting height?
The suspended crab trolley lowers the position of the electric hoist compared with traditional trolley designs.
This reduces the space occupied above the hook and provides additional effective lifting height under the same building conditions.
3. Can CD and MD electric hoists be used on this crane?
Yes. The crane can use CD single-speed electric wire rope hoist or MD double-speed electric wire rope hoist.
The selection depends on lifting accuracy, working frequency and customer application requirements.
4. Is this crane suitable for low clearance workshops?
Yes. This design is especially suitable for factories where the building height is limited but higher lifting height is required.
5. What information is needed for quotation?
Provide the lifting capacity, span, lifting height, workshop height, runway elevation, working frequency, power supply and application.
Yuantai engineers will optimize the trolley structure and hoist position according to actual site conditions.
6. What experience does Yuantai Crane have with low headroom cranes?
Yuantai Crane has experience in designing and manufacturing single girder cranes, double girder overhead cranes, European style hoists and customized low headroom lifting systems.
Each project is engineered according to capacity, building clearance, lifting height and customer operation requirements.
Need a Low Headroom Double Girder Overhead Crane?
Send us your lifting capacity, span, lifting height, workshop clearance, runway elevation, working frequency and application details.
Yuantai Crane can engineer a low headroom double girder overhead crane with suspended CD/MD electric crab hoist trolley to improve lifting height, reduce space requirements and provide a cost-effective industrial lifting solution.
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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.)
- Any special requirements?_____ (e.g., extreme temperature, dusty or explosive environment, special paint color, etc.)
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