Top Running Single Girders

Bridge Cranes

Motorized Top Running Single Girders

Bridge Cranes

The wheels on motorized, top running single girders operate on either ASCE crane rail, square or rectangular rail. They tend to have a longer wheel and bearing life expectancy than underhung cranes of the same type and capacity.

Motorized, top running single girders offer excellent headroom advantages over other styles of cranes due to the extra lift height that is gained by having the crane girder on top of the end trucks rather than suspended from the bottom of the trucks as in underhung applications.

Motorized, top running single girders that require spans exceeding 60 to 65 ft. are likely to be constructed as a box girder. Motorized single girder bridge cranes have a very light weight to span ratio and in many cases can reduce the size of the runway and building structure required to support them. These cranes are often referred to as mono box bridge cranes.

CMAA Class C is standard but an overhead bridge crane is available in classes A-D. To decide which class meets your application needs refer to CMAA Classifications.

Features of Motorized Top Running Single Girders:

Best utilized where reliability and long term maintenance savings are important
Generally move at higher speeds than underhung cranes with speeds approaching 200 fpm.
Excellent headroom
Available in 1 to 20 ton capacities with spans that can exceed 85 ft.
Powered overhead bridge crane can be shipped preassembled and receive an operation check prior to leaving the shop.*
Remote controls and pendants traveling along an independent track are available to keep operators a safe distance from the working load.
Many sizes and capacities are pre-engineered for quicker delivery dates.

Applications

Wire Mill
Handling Coils
Mold Handling
Metal Storage
Fabrication
Stamping

*If an overhead bridge crane has an end truck length of over 8 ft. it will be disassembled for shipping

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Manual Top Running Single Girders

Bridge Cranes

Push/Pull Manual Top Running Single Girders

Top Running Bridge Cranes

Push Pull Manual Top Running Overhead Bridge Crane by CraneWerks in Morristown, IN

Features

Inexpensively manipulates loads up to 5 tons and spans up to 45 ft.
While push/pulls type cranes available up to 5 tons, they are generally not recommended for capacities over 2 tons.
Operates best when installed at elevations of 15’ and less
They are not recommended where floors are slick or where floors are covered with debris as it is important for the operator to have good footing at all times when using these cranes.
Push/pull overhead traveling cranes become harder to use as the physical size of the product increases.

Design Details

One of the most economical ways to move light loads

Since these top running bridge cranes are pushed/pulled by the operator they control the speed. This allows the operator to adjust to changing production demands. Top running cranes in general offer the advantage of raising the elevation of the hoist to a higher point than underhung cranes. This gives excellent hook height allowing the crane to lift equipment and products higher.

Hand Chain Manual Top Running Single Girders

Top Running Bridge Cranes

Manual Chain Top Running Overhead Bridge Crane by CraneWerks of Morristown, IN

Features

Can manipulate loads up to 15 ton in capacity.
Higher capacities are available with the use of a double girder crane.
Spans of these types of overhead traveling cranes are generally limited to 50 ft.
Use for maintenance, die handling, and fabrication assembly applications

Design Details

Hand chain driven manual bridges are operated by pulling a chain that is looped over a chain wheel to turn the drive shaft and the drive gears on the bridges wheels. Due to the relatively slow nature of a manual chain hoist, they are recommended for use in applications that require precision spotting.

As the loads increase in size and weight, hand chain bridge cranes are preferred over manual push/pull cranes. The heavier the load, the more force it takes to move it. Another advantage of the hand geared overhead traveling crane is that it can be operated at a safe distance from the load.

Manual bridges work well with chain hoists, wire rope hoists, air hoists and air balancers. Each crane can be equipped with an electrical festoon wire or an air hose to provide power to your desired lifting apparatus.