Demag-Terex Cranes Introduces Double Girder Design

Demag-Terex Cranes Introduces Double Girder Design
12/24/2015 1:19:44 PM

Demag V-Type Crane

Industry leader Demag-Terex has expanded upon their V-type single girder crane with Terex Material Handling's new V-type double girder overhead traveling crane. The new double girder models are able to handle a load capacity of up to 50 tons, and come with a standard span of 35 meters, with longer girder lengths available upon request.

"Following the positive response from the market for our V-type single girder crane, we have taken the next logical step with the introduction of the double girder design,” said Andreas Hambrock, Senior Director of the Universal and Modular Cranes’ Business Line at Terex Material Handling.

Demag-Terex, which recently celebrated 50 years of business in North America under the Demag Cranes brand, continues a tradition of innovation dating back to early 19th century Germany. Larry Collier has worked with Demag for over two decades.

The new model is highlighted by the crane girder’s lower weight, compared to cranes manufactured in box section girders. This gives the crane the ability to bear a higher weight capacity.

This reduced weight means reduced deadweight, in turn creating less wheel pressure and less stress on crane runways, buildings, and vehicles. This design has many benefits, from reducing general wear and tear at equivalent load capacities, to granting more architectural freedom in the design of factory buildings.

The V-type’s design features mechanically connected girders that are naturally more rigid than the traditional box section girder designs. The end trucks are manufactured to precise machined tolerances for minimum wear. This creates the possibility for faster material handling in conjunction with the ability to handle more sensitive loads with accuracy and care.

The unique design also allows for increased precision, and reduced wear on its crab runway. With the crab rail in the middle of the girder, the forces are distributed evenly, making the crane girder torsion-free. It is completely torsionally rigid.

The crab rail sees less wear with the V-type design, transferring the forces of the load vertically to the girders. This helps to precisely maintain the track gauge of the crab runway.

Side connection of end carriages on the girder is a feature native to all four of Demag-Terex’s V-type double-girder crane designs. The four designs are differentiated by the shape of the girder ends, and vertical connection position, allowing for the selection of a V-type design that is best suited to the existing structure.

On new structures, the crane’s distance from the roof can be reduced to minimize maintenance expenses and construction costs, while its low deadweight was already reducing costs. With an older building, the height of the V-type girder can be increased, which can be a boon in situations where the load-bearing ability of the structure would otherwise be an issue. It also helps save money with a rope hoist that comes with a 2m+ service life classification.

Additionally, the low-impact design allows more light to pass through to the workspace below. This can improve workplace safety and sight-lines. As you can see, the Demag V-type double girder crane is a significant improvement from past designs, with many applications and advantages worth digging into for your next project.

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