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Figure 16-46.-Screed extension accessories.
Paving Safety

Equipment Operator Basic - Beginning construction equipment operators manual
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models, screed extensions make it possible to pave widths up to 24 feet in a single pass. Cutoff Shoes. — Cutoff  shoes  (fig.  16-47)  have  the opposite function of screed extensions. They are metal plates inserted into the screed to reduce the width of the mat being placed. Bevel End Plates.— Bevel end plates (fig. 16-48) are used to bevel the edge of the mat. On some models, the shoes can be set at any one of three positions: vertical, 30 degrees, or 45 degrees. Tons Per Hour The  equation,  used  to  compute  the  amount  of asphalt that can be layed with a paver per hour, is as follows: Figure  16-47.—Cutoff  shoes. 16-42 Where L  = W  = D  = 146 = 60  = 2,000 = Figure 16-48.-Bevel end plates. Feet per minute. The NCF uses 11 feet per minute  for  planning  purposes. Width  of  the  paver  screed Depth or thickness of compacted mat This  number  represents  the  approximate weight  of  1  cubic  foot  of  compacted hot-mix  asphalt 60 minutes in 1 hour There are 2,000 pounds in 1 ton Example: The required tonnage of hot-mix asphalt for a project is 800 tons. The screed of the paver is set at 10 feet, and the depth of asphalt is 2 inches. Estimate the amount of asphalt that can be laid per hour. By  planning  and  estimating  the  amount  of  hot-mix asphalt that can be laid per hour, you are able to tell the asphalt plant exactly how much hot-mix asphalt is required to be delivered per hour or per day. MAINTENANCE As an Equipment Operator, it is your responsibility to coordinate the proper operation, care, use, adjusting,







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