Double Girder Cranes

Crane

Double Girder Crane
A single girder or double girder design will be one of the largest contributors to the complexity and overall cost of a new overhead crane system. A bridge crane is a type of overhead crane that includes two or more overhead runways built into the building?s support structure. Bridge cranes have different configurations and can be comprised of one or two beams?more often referred to as a single girder or double girder design. Girders can be made of rolled steel or can be fabricated by welding the beams into a steel box design for added strength and rigidity. The bridge is a load-bearing beam that runs the width of the crane bay and is the primary structural component that connects the runways and moves the hoist forward and backward using a trolley. The trolley and hoist can be designed to be top running or under running depending on the design of the building structure and the requirements needed to make the lift. A single girder or double girder design will be one of the largest contributors to the complexity and overall cost of a new overhead crane system. In this article, we?ll discuss the advantages, disadvantages, and differences between single girder and double girder bridge crane systems. You?ll want to give careful consideration to the bridge design of your overhead crane system to make sure that you understand the requirements of the lifting task and the environment where the crane will be operating.