Single girder overhead cranes , These types of cranes are used as an economic solution for material handlings in production halls with small openings and tonnages of less than 10 tons as a standard, although Mehregan crane offers engineering solutions with open working groups for higher tonnages. . Transverse movements are performed by transverse guides placed on the carriage, which are supplied from Western European products based on reliable vendors, and longitudinal movement is also performed by the End Carriage system. These types of cranes have limitations such as low working classes and are not suitable for heavy duty applications. Also, one of the disadvantages of these types of cranes is the lower standard height of these cranes.