What is a crane?

Crane beam is a pre -refined metal beam on which a crab or lifting head of a travel crane runs. Such beams are usually "I" profile rays, which can be reinforced at different points depending on the load and crane configuration. They may contain several layers of crane beams such as disposable bearing, double beams or bridge beams. The configuration largely depends on the light in the building and the crane load that is designed to rise. During the lifting of operations, there are often serious tensions and special attention should be paid to evaluation, reinforcement and periodic control and maintenance. Depending on the type of installation, overhead cranes usually have between one and three crane beams. The crab or passenger head of the crane is equipped with a set of rollers, which either runs on the top or on the lower cross member of the beam I. In installations with one beam, only a crab beam is used. In a double carrier or bridge crane, the crab beam is equipped with carriages on OBOAt the ends and moves up and down the loading area on two other crane beams.

Installing beams with a single crane nose are useful in applications where no transverse movement is required. These machines, also known as Monorail cranes, can travel along the length of the beam and raise or lower load. This type of crane is useful in narrow spaces where the movement movement is limited to space length. These cranes generally run at the bottom of the beam, which is usually supported in several points along its upper cross member. One disadvantage is a reduced height of the hook, because the crab and the hook is usually placed under the crane beam.

Bridge and double supporting cranes are much more flexible and all three -dimensional movement of the hook. In these installations, the crab can move around the load -bearing crane to cover the width of the space. In addition, the load -bearing crane set can move along the entire length of the spaceA much wider area than a monorail. This type of crane has another advantage in the fact that the crab beam runs on the side nasals or is raised to run between them. This allows widespread hook heights and improved flexibility.

Crane wirds, especially crab beams, are constantly exposed to a number of stress loads during operation. These include vertical voltage developed by load, side voltage caused by acceleration and cracks and transverse stresses caused by load fluctuations. Crane's beams are often reinforced with flat plates or channels along their mounting cross -sections to withstand these voltages. In order to ensure the safety of personal and load operations, the crane beams should be properly evaluated regularly checked by signs of damage.