Following the worldwide launch of the V-type single-girder crane, the Demag range of cranes continues to be expanded: with its ZVKE, Terex Material Handling has presented a double-girder overhead travelling crane that will cover the load capacity range up to 50 tons in future. The V-type double-girder crane is offered using a span of up to 35 m as normal, longer girder lengths can be provided on request.
“With our ZVKE, we are sending a powerful message and consistently pursue our strategy to offer this crane having an extensive load capacity range.”
A significant feature of the V-type crane is the reduced weight of the crane girder compared with cranes that have box-section girders. The average weight saving for the single-girder design is 17%. As a result of the building with two crane girders, the share of the decreased girder weight is higher in regards to the crane. This ends in possible load capacity increases for an overhead travelling crane, which can thus be designed with a rope hoist that’s a greater load capacity. What this means is that section girder doubles -girder crane can transport higher unit loads – and attains a total weight such as the suspended load that is no higher than a crane which has a box-. As a consequence, the crane runway and building superstructure will not be subjected to any loads that were higher, despite the larger load capacity.
Precise positioning of goods that are sensitive
An additional benefit when compared with the box-section girder is the capability to handle loads more quickly, because the crane system is inherently more rigid thanks to its girders that are joined. This enables loads and placed and sensitive goods to be carried just and even more gradually.
Precise adaptation to match building geometry
The V-type double-girder crane is offered in four distinct designs. The side connection of the end passenger cars to the girder is a feature that they all share. The various kinds are distinguished by their vertical location with regards as well as the shape of the girder ends to the connection. This ensures that the crane design might be adapted in the perfect manner to the volume of present buildings. For brand new buildings, the space between the building and crane roof can be reduced. Costs are saved by this variable for the building construction as well as for its upkeep as well as care.
In the event the headroom available in existing buildings enables adequate range, a further weight-saving factor can be used. The girder height might be extended when the headroom dimension of a V-type crane is – that was defined and this empowers additional weight to be saved. This gain can be utilised where only little scope is allowed by the building superstructure for loads.
The ZVKE offers more preciseness with reference. Placing the crab rail in the middle of the V-type crane girder additionally results in a balanced distribution of forces and the crane girder stays free of any torsion. Thanks to its V-type design with vertical struts, the load-dependent forces applied by the rope hoist crab are transferred vertically to the girders. This benefit results in minimised wear on the crab train and crab trolley system.
In this manner, the V-type double-girder crane ensures the track gauge of the crab runway is just preserved.
More light – improved security
Due to its girder layout, which is based on bionic principles, the V-type crane, particularly in the double-girder version, allows considerably more light to pass compared with solid crane girders.
Andreas Hambrock: “Many of our clients appreciate the state of the art layout of our V-type crane – also because it affords a view that is better and permits light to pass through. This results in a brighter and much more pleasing feeling and, ultimately, in a safer working environment.