overview
The terms gantry crane and overhead crane (or bridge crane) are often used interchangeably, as both types of crane straddle their workload. The distinction most often drawn between the two is that with gantry cranes, the entire structure (including gantry) is usually wheeled (often on rails). By contrast, the supporting structure of an overhead crane is fixed in location, often in the form of the walls or ceiling of a building, to which is attached a movable hoist running overhead along a rail or beam (which may itself move). Further confusing the issue is that gantry cranes may also incorporate a movable beam-mounted hoist in addition to the entire structure being wheeled, and some overhead cranes are suspended from a freestanding gantry. The quayside container crane is a container handling crane installed at large dockside for loading and unloading ship-borne containers to the container trucks. The dockside container crane is composed of a supporting frame that can travel on a rail track. Instead of a hook, the cranes are equipped with a specialized spreader which can be locked on the container.parameter
| based technology paramters | capacity | under spreader t | 35 | 41 | 51 | 65 | ||||
| above spreader(t) | 45 | 50 | 61 | 75 | ||||||
| lifting height | above rail (m) | 37 | 25 | 50 | 35 | 58 | 40 | 62 | 42 | |
| below rail (m) | 12 | 15 | 18 | 20 | ||||||
| Ex-extension distance (m) | 30 | 45 | 51 | 65 | ||||||
| Post-extension spacing (m） | 10 | 15 | 15 | 25 | ||||||
| rail base (m) | 16 | 16/22 | 30.48 | 30.48 | ||||||
| trolley travel distance (m) | 56 | 76/82 | 96.48 | 120.48 | ||||||
| Door frame inside width (m) (more than) | 17.5 | 17.5 | 18.5 | 18.5 | ||||||
| The door frame is connected to the beam net height (m) (more than) | 13 | 13 | 13 | 13 | ||||||
| buffer distance( less than m) | 27 | 27 | 27 | 27 | ||||||
| speed | lifting speed | full load (m/min) | 50 | 60 | 75 | 90 | ||||
| empty load (m/min) | 120 | 120 | 150 | 180 | ||||||
| trolley travel speed (m/min) | 180 | 210 | 240 | 240 | ||||||
| crane travel speed (m/min) | 45 | 45 | 45 | 45 | ||||||
| One-way pitch time (min) | 5 | 5 | 5 | 5 | ||||||