Surrey Crane Training - Bridge cranes or likewise called overhead cranes are a type of industrial material handling crane making use of a line and hook mechanism that runs on a horizontal beam running along two widely separated rails. Many overhead cranes can be seen within a long factory building and they can run along the building's two long walls, like a gantry crane.
Normally, overhead cranes consist of either a double beam or single beam construction. These could be made by making use of either a more complex girder style or typical steel beams. The single bridge box girder crane is complete with the hoist and the system and is operated with a control pendant. When the application needs heavier capacity systems for ten tons or more, double girder bridge cranes are more common.
With the girder box configuration, one major advantage is the lower deadweight with a stronger integrity of the overall system. One more advantage will be the hoist to lift the stuff and the bridge that spans the area covered by the crane, along with a trolley in order to move along the bridge.
Overhead cranes are more generally used within the steel trade. The steel is handled using this particular crane at each and every stage of the manufacturing process until the product is shipped from the factory. The crane is also responsible for pouring raw materials into a furnace and hot steel is then stored for cooling making use of an overhead crane. As soon as the coils are finished they are loaded onto trains and trucks using overhead crane. The stamper or fabricator also relies on overhead cranes so as to handle steel within the factory.
Overhead cranes are usually used in the automobile business for the dealing with raw material. There are smaller workstation cranes which are meant to deal with lighter loads within work areas like for example in sawmills and CNC shops.
In practically all paper mills, bridge cranes could be seen being used for regular maintenance requiring the removal of heavy press rolls and several machines. Some of the cast iron paper drying drums as well as several pieces of specialized machines weigh as heavy as seventy tons. The bridge cranes are utilized in the primary construction of the paper equipment in order to facilitate installation of these enormously heavy items.
The cost of a bridge crane can be largely offset in lots of circumstances with savings incurred from not leasing mobile cranes when a plant is being made which utilizes a lot of heavy process equipment.
The Rotary Overhead crane has one end of the bridge attached on a fixed pivot and the other end carried on an annular track. The bridge traverses the circular area below. Rotary Overhead cranes supply improvement over a Jib crane by making it possible to offer a longer reach while eliminating lateral strains on the building walls.
Demag Cranes & Components Corp. was one of the very first companies to mass produce steam powered cranes. The now defunct Alliance Machines were the second company to mass produce cranes. Alliance holds an AISE citation for one of the earliest cranes in the United States market. This crane was utilized in service until around 1980 and has been retired into a museum in Birmingham, Alabama.
Since the early days, a lot of innovations have come and gone, like for example, the Weston load brake is currently considered rare, whereas the wire rope hoist is still popular. Initially, the hoist contained components mated together in what is now called the built-up style hoist. These super industrial hoists are used for heavy-duty applications like steel coil handling for example. They are likewise common for users who want better quality and long life from their machinery. These built up hoists even provide for easier maintenance.
Nowadays, nearly all hoist are package hoists meaning that they are built into one unit in a single housing. These hoists are typically designed for ten years of life. This estimate is based on an industry standard wear and tear when calculating actual life.
The Material Handling Industry in North America, there are very few governing bodies in the business. The Crane Manufacturers Association of America is represented by the Overhead Alliance that likewise represents HMI or otherwise referred to as Hoist Manufacturers Institute and MMA or Monorail Manufacturers Association. The members of this organization are marketing representatives of the member companies and these product counsels have joined forces to generate advertising materials in order to raise the awareness of the advantages to overhead lifting.