A Bridge Crane system consists of three major components.
the Bridge Crane, which traverses across the runway
the hoist & trolley, which traverses across the bridge and lifts up and down
the runway, which is tied to the building structure.
Top Running vs. Under Running
Top Running vs. Under Running is primarily determined by two factors:
Capacity - Although under running can be up to 25 ton capacity, the practical limit is more like 15 tons and the economic sweet spot is 1 to 7.5 ton range.
Support Structure - Under running can be suspended directly from the overhead steel (for lighter cranes). Top running cranes will require a bracket off the building support steel (up to 10 tons capacity) or independent columns for heavier capacities.
A Bridge Crane system consists of three major components.
- the Bridge Crane, which traverses across the runway
- the hoist & trolley, which traverses across the bridge and lifts up and down
- the runway, which is tied to the building structure.
Top Running vs. Under Running
Top Running vs. Under Running is primarily determined by two factors:
- Capacity - Although under running can be up to 25 ton capacity, the practical limit is more like 15 tons and the economic sweet spot is 1 to 7.5 ton range.
- Support Structure - Under running can be suspended directly from the overhead steel (for lighter cranes). Top running cranes will require a bracket off the building support steel (up to 10 tons capacity) or independent columns for heavier capacities.
