Explain rigid screed extension, Mechanical Engineering

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Rigid screed extension

When the basic width of the paver screed (8 feet for small pavers and 10 feet for the larger machines) needs to be changed to accommodate increased paving widths, rigid screed extensions can be employed. These extensions come in several widths, usually 6 in., 1 ft., 2 ft., 3 ft. and 5 ft. sections. Further, it is very important that the extension be set at the same elevation and angle as the basic screed to prevent the presence of a transition line or ridge at the intersection of the main screed and the extension or between different sections of extension. Whenever a rigid screed extension is employed on the basic paver screed, auger extensions and the accompanying auger tunnel extensions should also be added. The length of all the auger and tunnel extensions should, in general, be the same length as the added screed extensions to allow room between the end of the auger and the end plate of the screed. Typically the distance between the end of the auger extension and the end plate should be about 18 inches.

 


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