What are the different types of overhead cranes?
What are the different types of overhead cranes?
The different types of overhead cranes include gantry cranes, jib cranes, bridge cranes, workstation cranes, monorail cranes, top-running, and under-running.
What is the difference between gantry crane and overhead crane?
The difference between an overhead crane and a gantry is that the crane girders are attached to the legs of the gantry so that they can run without runway beams and columns. Overhead cranes can be installed by utilizing the building’s column construction so that they are able to serve most of the areas in the building.
What is a Underhung crane?
Underhung cranes—sometimes referred to as under-running cranes—do not require supportive floor columns. This is because they typically ride on the lower flange of a runway beam suspended from the facility roof or rafters. By optimizing end approaches, underhung overhead cranes make the most of facility space.
What is an Underhung hoist?
An Underhung Crane is a type of overhead crane with end trucks that ride on the bottom flange of the runway beams instead of on top. Sometimes these overhead cranes are called “under-running” instead of underhung. These runway beams are often suspended from the roof, which eliminates the need for extra support columns.
What is a boom crane?
A boom truck crane, or a telescoping crane, uses high-boom angles and a hoist to lift loads. These cranes are designed for strength and stability and are typically used to lift heavy loads vertically.
What is the difference between a gantry and bridge crane?
A gantry crane is similar to a bridge crane, but instead of moving on suspended runways, the crane uses legs to support the bridge, trolley, and hoist. These legs travel on rails that are embedded in, or on top of the floor or ground structure.
What type of crane has a bridge supported by two or more legs?
A hoist, the lifting component of a crane, travels along the bridge. If the bridge is rigidly supported on two or more legs running on a fixed rail at ground level, the crane is called a gantry crane (USA, ASME B30 series) or a goliath crane (UK, BS 466).
What is a top running crane?
A top running overhead crane has a fixed rail or track system installed on the top of each runway beam—allowing the end trucks to carry the bridge and hoist along the top of the runway system. Top running cranes can be built to capacities of anywhere from 1/4-ton to excesses of 100-tons.
Which motor is used in overhead crane?
Conventional AC operated crane drives use slip ring induction motor whose rotor windings are connected to power resistance in 4 to 5 steps by power contactors.
What makes an Under Running Crane a running Crane?
Under running cranes run on wheels supported by the bottom flange of the runway beam and are most commonly supported by ceiling trusses or the roof structure. They’re ideal for facilities that lack vertical clearance.
How big can a top running Crane be?
Top running cranes can be built to capacities of anywhere from 1/4-ton to excesses of 100-tons. These types of overhead cranes are supported by the building structure or runway support columns and are ideal for moving extremely heavy loads.
Where does a top running Crane run on a runway?
Top running cranes run on a fixed rail or track system on the top of each runway beam. They can be configured in a single girder or double girder bridge design and are ideal for moving extremely heavy loads.
