Electric overhead traveling cranes follow the same general design with some variation between the double girder and single girder models. Double girder models are built with the hoist held in between two large metal beams, typically connected to the ceiling. Sometimes these are built as free-standing, lightweight cranes for smaller lifting jobs.
Single Girder Cranes | Design Features
The single girder cranes are a type of electric overhead traveling crane. These cranes are typically utilized in a warehouse environment for the lifting of moderately heavy to extremely heavy objects. Single girder cranes are often an integral part of assembly work, easing the burden on workers and lifting the same amount of weight that would have previously taken a large team of employee’s significant effort and time to move. Such efficiency allows the mass production that defines modern economies.
A single girder crane is designed a bit differently. Unlike the double girder crane, the single girder cranes have one beam below which the hoist is connected. Single girder cranes tend to be less expensive than double girder cranes. Depending on the environment they are used, single girder cranes can be a great choice. Because of their design, the cost for a single girder crane can become high if they need to span very long distances. For shorter distances, these cranes are capable of lifting heavy loads.
Another aspect of single girder cranes to consider is how high the crane can lift the object off of the ground. In some situations, this will not matter, however in others it is imperative that you have a higher lift height. As a rule, single girder cranes are not able to lift objects as high as double girder cranes. This is due to the fact that single girder cranes have the hoist hanging below the singular beam whereas double girder cranes are able to suspend the hoist between the two beams, allowing for extra lift height. In fact, some double girder cranes are designed to be ultra-low headroom cranes that will function in areas that other cranes simply could not fit.
Single girder cranes are generally relatively simple to operate, owing to the fact that they are typically traveling in a straight line on a controlled tracked. Buttons on a control panel allow a worker to initiate the crane and determine the direction of movement.
A single girder crane is an expensive investment and careful consideration of the current and future needs of the business will ensure that the initial cost of purchasing a crane is well worth it. It may be tempting to think that a single girder crane can be used in place of a double girder crane to save money. While this may be the case, single girder cranes only save so much. The design of single girder cranes requires very strong steel to allow for saving and efficient lifting. If a single girder crane meets your needs, then it can be an invaluable tool. If your needs are better served by a double girder crane, then the slightly higher cost is likely going to be well worth it down the road.