8-16B, 10-20B and 10-20WB Extend-A-Mat<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> Screed Caterpillar

Before Paving Setup

Usage:

When you pave, you must first determine the width of the mat. The machine must be set up with the proper extensions, cut off shoes, and attachments that are required for the job.

If the paving width is less than the width of the machine, add cut off shoes. Cut off shoes decrease the paving width in 76.2 mm (3 inch) increments.

If the paving width is more than the width of the machine, add extensions. Extensions increase the paving width in 0.31 m (1 ft) and 0.71 m (2 ft 4 inch) increments.

The total width of the pavement must be known. Calculate the width of the strips equally. Use the appropriate attachments in order to obtain the paving width that is required.

Consider the following conditions when you begin to pave.

Allow at least 104 mm (4 inch) of clearances between the outside of the screed and a straight curb for steering. This will prevent the paver from becoming locked against the curb. If the paver becomes locked with the curb, the machine must back up. This will cause marks in the mat surface.
When you lay multiple passes, stagger the overlaps approximately 50.8 mm (2 inch) at each joint that is matched.
When multiple passes are required, the cut off strip should be laid prior to the final pass. Use the setup width for the final pass.
The cut off shoes should be in the opposite side of the joint matching side.
Do not overlap excessively at either end of the screed. Improper compaction, bridging, and tearing may result. Overlap should be held at a minimum at all times.
When paving wide roads, a middle pass should be paved first. This will place the crown in the center of the road.
When paving roads with curbs and gutters, the screed can overhang the gutter on the top course. On the binder course, the gutter flange should be treated as a straight curb. Laying the full width of the pavement is better than laying narrow passes that equal the correct width. This is true even if some hand spreading is required at the curbs.