Topcon mmGPS 3D Paver, Reference Manual

Page: 227 / 288

Paving City Streets with Cross Slope
P/N 7010-0781
6-19
When the system is used to pave a true 2.0% slope, the crown of the
street is not at the centerline (Figure 6-21).
Figure 6-21. Curb with Same Slope
To pave from uneven curbs using slope control, choose the side of the
road with the highest curb and position the tracker over the curb. Set
the other side for the cross slope you want and begin paving
(Figure 6-22).
Figure 6-22. Paving Uneven Curbs with Slope Control
To keep the centerline in the middle of the road, the second pass has
to be set up with sonic control on each side of the paver. The left
tracker matches the lip of the curb and the right side tracker follows
the new mat (Figure 6-23 on page 6-20). The cross is not consistent
on this side of the roadway, but the joints will match.
2.0% 2.0%
Original
Centerline
New
Centerline
at 2.0% Grade Cut
Centerline
of Road
Subgrade
Sonic Tracker II
T