The surface of the mat will usually be higher than the top of the manhole after you lay the top course.
When you are laying two layers of asphalt, and you are laying the bottom course, the screed will not pass over the manhole. The screed must be raised in order to allow the screed to pass over the manhole. Return the screed to the proper height after passing over the manhole.
To mark the position of the manhole, place a mark alongside the mat. The mark will help the operator judge the position of the manhole while the manhole is under the paver.
The paver should be stopped when the screed is almost in contact with the manhole. The screed should be raised at this point in order to allow the screed to pass over the manhole. Raise the screed. Move the paver forward until the screed is just past the manhole. When the screed is just past the manhole, the screed is lowered to the original position.
Rake the excess material that is left on the ground around the manhole.
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| Illustration 1 | g00668769 |
If the position of the manhole will cause one of the tracks to pass over the manhole, use the thickness controls to keep the screed at the desired height as the track passes over the manhole.
For the track to travel over a manhole, a ramp must be constructed if the manhole is more than 76 mm (3 inch) above the surface.
To make the ramps, use material from the hopper of the machine.
Any asphalt on top of the manhole should be removed before the compactor passes over the manhole.