Crane manufacturers are operations that supply industries and commercial operations with materials suspension equipment. Materials handling operations require a great diversity of equipment to accommodate all of the different kinds of loads that they are used to move. Cranes are often indispensable tools for such operations.
Crane manufacturers offer many different varieties of cranes. They are made for a wide range of lifting and positioning applications and vary in load capacity up to nearly 1,000 tons. Bridge cranes, which in some cases are known as track cranes, are stretched across building structural beams and used as permanent fixtures in manufacturing or distribution facilities, operating from a set of overhead rails. Gantry cranes are bridged between two movable supports, often on wheels, and are typically used outside in large industrial construction applications. Jib cranes, unlike other classes of overhead cranes, are only supported on one side by a vertical support or wall fixture; many workstation cranes are types of jib cranes. A beam extends from the support or wall on a pivot, while the trolley carries the hoist along the overhead beam. Stacker cranes are used in automated computer warehouse systems and move vertically or horizontally on tracks to reach items in large storage facilities. They are an alternative to forklift trucks and are popular in warehouses where conditions are inhospitable to workers. For crane applications that require more than linear movements or are in hard-to-reach places, mobile cranes are used as an alternative to overhead cranes. A large percentage of modern construction operations are accomplished with the help of some kind of crane. Bridges, monuments, cargo ships and other large vehicles and vessels are built using gantry cranes, and most industrial equipment manufacturing and large metalworking processes use built-in overhead traveling cranes to move objects around. Bridge cranes present a safe, easy-to-use alternative to ground transportation in many situations, particularly when handling extremely heavy or awkwardly shaped objects. Because all of a bridge crane's constituent parts are suspended above ground, they do not occupy any space on the ground. Small jib cranes can provide excellent relief from factory or assembly workers continually lifting and moving objects around a facility while taking up little or no valuable floor space. Cranes used for material and equipment handling within a facility, like monorail cranes that are mounted to the ceiling, are often referred to as workstation cranes.
Gantry cranes are one quite common crane variety. Gantries are sometimes supported on one side only and are usually counterbalanced on the side opposite the hoist; these are called half gantries, semi-gantries or cantilevered gantries. Jib cranes differ from semi-gantries or cantilevered gantries in that the overhead arm typically pans 180 degrees horizontally, as opposed to the half gantry's fixed arm. Jib cranes may have a portable one-sided support, or smaller workstation jib crane arms may be attached to the wall; these are often called wall cranes.
Still more innovations have been offered by crane manufacturers even within the context of individual crane configurations. The bridge crane, for example, is available in single and double girder configurations. A bridge crane is a complex of vertical girders to which one (in the case of single girder cranes) or two (in the case of double girder cranes) girders are attached. Attached to the girder or girders is a winch system that is used for lifting and lowering objects. Single girders are sometimes mistakenly considered to be diminished in their capacity for lifting loads compared to double girder varieties. In reality, the only significant difference between single girder and double girder varieties is the maximum height that the bottom of the winch hardware can achieve. Crane manufacturers can advise their customers about the best configuration for a given use. Especially in the construction industry, the applications for cranes can vary widely from project to project. In many cases, such as in the construction or repair of a bridge, mobile cranes, the dimensions and capacities of which can be specially suited for the task, are designed with that specific project in mind. This can be true in many other specialized applications as well.
Ceiling Mounted Bridge Crane - Gorbel, Inc.
Cleveland Tramrail Underhung System - Gorbel Inc.
Industrial Bridge and Jib Cranes - Brehob Corporation
Crane Hoist Fabrication Installation - Brehob Corporation
Free Standing Work Station Bridge Crane - Gorbel Inc.
Overhead Cranes - Konecranes, Inc.
Overhead cranes, also known as hoist cranes, are the simplest among different types of cranes; they consist of a simple overhead or elevated structure on which a hoist, a lifting medium, travels. However, this type of crane is extensively employed in industrial settings, as overhead cranes have high lifting capacity, and the hoist provides motion along different axes; you can move object side to side, up and down, and back and forth.
Overhead cranes can move heavy loads without interfering with other machines and equipment, as loads are moved through the overhead space. The crane eliminates the need for lifting trucks in a facility's aisles, which can lead to accidents. There are a number of ways to operate overhead cranes; they can be directed manually using a wired pendant station or wireless control system. The crane is powered either by an electric hoist motor or by a pneumatic device. Since overhead cranes have multi-directional movement, they can be used in storage, loading, unloading, and manufacturing activities. Based on the need, they can be installed inside a facility or outdoors, such as at shipping yards and railway ports.
Areas where overhead cranes can be employed:
Advantages of overhead cranes:
Overhead cranes can be used indoors and outdoors, and can accommodate changes in operation.
A host of additional components, such as end effectors and hook attachments, can be easily added to overhead cranes. A single crane can perform different tasks with few additional tools.
The operation of overhead cranes is easy, and an operator can be trained in a matter of days, whereas other crane operators have to go through extensive training to be an operator. Moreover, as no manual lifting is involved, it reduces fatigue among operators.
Overhead cranes are the safest plant and facility equipment; it removes the probability of accidents since objects do not intervene with others.
Since there are few moving parts, wear and tear is limited, which directly cuts maintenance cost.
Since overhead cranes do not have to maneuver across aisles, the loads are transported along a linear path, making the operation faster.
The modern wireless operation and independent push button panels keep operator out of danger associated with loading and unloading.
Cuts labor expenses
With the installation of a single overhead crane, the need of forklifts and their operators can be eliminated. The overhead crane also makes the operation lean since a single operator can manage loads of work, easily.
With overhead cranes, objects or loads can be lifted to greater heights than the alternatives like forklifts. A warehouse can be stacked more efficiently with the help of an overhead crane.
Crane Manufacturer Terms
- A rolled
structural steel member, typically used as a bridge girder for short span
or low capacity cranes.
- A type of short end truck that is attached to the end of one girder or to a connecting member if more than one truck is utilized per girder. Bogies are used when the design of the runway necessitates more than four wheels on the crane.
- A mechanism mounted horizontally on the trolley of an overhead crane. A load is lowered or hoisted by the boom at a point other than directly under the hoist drum or trolley.
- An enclosed, rectangular cross-section of girders, trucks or other members.
- The part of an overhead crane that carries the trolley and travels parallel to the runway. Bridges consist of girders, trucks, end ties, a walkway and a drive mechanism.
- An electrical conductor, at times incorrectly referred to as a "trolley conductor," that provides power and control circuits to the trolley. Bridge conductors are located along the bridge girders.
- The compartment from which the operator controls the crane.
- The slight upward vertical curve given to girders to partially compensate for deflection due to hook load and weight of the crane.
- An assembly, also called a "trolley," that supports a load and runs on a monorail track or crane girders.
- The top or bottom plate of a box girder.
- The loads on a structure that remain in a fixed position relative to the structure.
- The walkway with handrail and toe-boards, attached to the bridge or trolley for access purposes.
- The principal horizontal beams of the crane bridge, which support the trolley and are supported by the end trucks.
- A mechanism used for lifting and lowering a load.
- The lifting attachment point suspended from the hoist machinery, typically single- or double-pronged. Double-pronged hooks are known as "sister hooks."
- A sheave used to equalize tension in opposite parts of a rope.
- The assembly of hook, swivel, bearing, sheaves, pins and frame suspended by the hoisting ropes.
- A load used in durability calculations accounting for both maximum and minimum loads.
- A grooved wheel or pulley used with a rope or chain to change direction and point of application of a pulling force.
- The unit carrying the hoisting mechanism that travels on the bridge rails.
- The vertical plate connecting the upper and lower flanges or cover plates of a girder.