Harriman Material Handling

BRIDGE CRANES

Single Girder Manual

Push/Pull (shown)

One of the most economical ways to move light loads, these top running bridge cranes are pushed/pulled by the operator, who controls the speed. This allows them to adjust to changing production demands. Top running cranes offer the advantage of a higher hoist elevation than underhung cranes. The extra hook height allows the crane to lift equipment and products higher.

• Inexpensively manipulates loads up to five tons and spans up to 110 ft.
• However, because push/pull overhead traveling cranes become harder to use as the physical size of the product increases, it is generally not recommended for capacities over two tons.
• Operates best when installed at elevations of 15’ or below
• Because it’s important for the operator to have good footing at all times, they are not recommended where floors are slick or regularly covered with debris

Hand Chain Drive

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 loads increase in size and weight, hand chain bridge cranes become preferable to manual push/pull cranes.

• Can manipulate loads up to 15 tons
• Higher capacities are available with a double-girder setup
• Spans are generally limited to 110 ft.
• Works well with chain fall hoists, electric hoists, air hoists and air balancers.
• Great for maintenance, die handling, and fabrication assembly applications