What Is an Overhead Crane?
Overhead cranes are lifting systems that travel on rails mounted on the load-bearing columns of a building. Also known as ceiling cranes or travelling bridge cranes, they speed up material handling in production lines, assembly areas and warehouses.
Single-Girder vs. Double-Girder Differences
Single-Girder Overhead Cranes
These models with a single main girder are typically manufactured up to 16 tons. The trolley runs on the lower flange of the girder. Thanks to their lighter structure they are easier to integrate into existing buildings and place less load on the structural building.
Double-Girder Overhead Cranes
Consisting of two parallel main girders, double-girder models can reach high capacities up to 250 tons. Since the trolley travels on rails on top of the girders, greater hook height is achieved. Preferred in heavy industry and steel production facilities.
Overhead Crane Advantages
- Floor space savings: Thanks to overhead handling, the facility floor is free for production
- High precision: Precise positioning with variable-frequency drives
- Safety: Overload protection, limit switches and emergency-stop systems
- Efficiency: Faster and continuous handling compared to forklifts and mobile cranes
- Long life: Service life of 25-30 years with proper maintenance
Capacity Selection
When determining overhead crane capacity, take into account the maximum load to be lifted, hook and sling weights, dynamic load factors and future capacity needs. Selecting a capacity 25% above the planned maximum load is recommended.
Installation Requirements
Before overhead crane installation, the building steel structure must be capable of carrying crane loads. Column spacings, building height, runway rails and power supply lines must be planned at the design stage.