Paving Streets Through Intersections
P/N 7010-0341 www.topconpositioning.com
7-9
Figure 7-15. Survey to On-Grade and Return to Automatic Control
You may find after surveying that for the tracker on the curb the
number has changed slightly from the curb on the other side of
the intersection. This is due to the different depth of the base
below the lip of curbs. While paving, slowly dial the display
back to the previous number.
Method 2 for Paving Intersections
Sometimes, the base of the intersecting road is too rough to use
as a reference. An alternative is to use a simple piece of
stringline.
1. Take a section of 1/8” diameter string and nail or secure it
to the curb.
2. Pull the string tight through the intersection and nail or
secure it to the other curb (Figure 7-16 on page 7-10).
TIP
TIP
If the intersecting road has a crown, hike the
stringline up in the middle of the road to place
the string at the proper height. A hub or a stake
with a piece of wire to hold the stringline works
fine.
FiveSystem
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