Man and machine make a great team and this is no more evident than when man is faced with a larger-than-life task where a crane is his best friend. Depending upon the nature of your job, there are many types of cranes to meet your needs. One frequently used type is the overhead bridge crane.
This crane is available in two standard styles: namely, single girder bridge crane and double girder bridge crane. When headroom is of no concern, the most money-friendly option is the single girder. Providing the most economical service of electric cranes, there are two choices in this style- Top Running and Underhung.
A Top Running single girder’s bridge beam rests on the end truck and features an underhung hoist: whereas the Underhung crane also features an underhung hoist but is different with its construction of hanging from an end truck. The Underhung crane’s end truck is located below the runway beam where it is housed along with the underhung hoist. Of the two choices, Underhung is the most popular.
To determine the right one for you, consider your required capacity. With a capacity of 1 ton and up to 20 tons, the single girder features wide flange girders of up to 75 feet and spans of 60 feet. For a smaller capacity job, consider the 5 to 10 ton with 25 feet lift and spans up to 60 feet. This smaller model entices buyers with its quick ship guarantee offered by ProservCrane to be delivered within 3 weeks.
On the other hand, the double girder has a lot to offer. With an increased capacity at more than 15 tons and spans of over 60 feet, this crane is available in a four-wheel or eight-wheel bogie configuration. As with the single model, A4 dual drive is standard with a tubular steel frame and end plates that provide rail sweeps and are enhanced with shock-absorbing bumpers. Depending upon the demands of your job, the double girder can be ordered with up to Class “E” service. This enables a capacity as high as 250 tons, reaching lengths of 180 feet.
Some additional features include the enclosed or open cab option with or without heating and air conditioning. Line and load reactors, radio control, bridge alarm and a rotating beacon are available as well.
Again, the right overhead bridge cranes depends on your job’s needs. If CMAA Class “C” and “D” will do the job, then check out the single girder crane. When Class “E” is necessary, look into the double girder.