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Stake Out Alignments
The Starting Point of the vertical alignment is charac-
terized by
Starting Station
and
Elevation
.
Note: As soon as we have created a starting point for
vertical (or horizontal) alignment, the corresponding
component is considered to be not empty, even as it
has no linear sections.
Tap the “
Delete
” ( ) button in the Starting Point
screen if you need to delete the component com-
pletely.
Starting station of vertical alignment does not have to
be equal to starting station of horizontal component,
but there is not much reason to set it before the start
of horizontal alignment, as stake point generation is
tied to the horizontal alignment. In our example, ver-
tical starting station is equal to the horizontal one. So,
set the
Starting Station
to “1+00.0”, and
Elevation
to
150.0. As with horizontal alignment, later changing
the starting point coordinate (elevation) will shift the
whole vertical profile without deforming it.
Next, we will enter a level line smoothly blending into
a slope and back to level.
Like with horizontal alignment, tap the “ New Section ”
button to create first section (see Figure 23).
Figure 23
All we can change here actually are horizontal length
(via “ Hor. Length ” or “ End Station ” fields) and slope
(directly via “ Slope ” or indirectly via “ End Elevation ”).
Set the length to 75.0, leave the section level and tap
New Section
to go on. In the new section created, tap
“ Straight Line ” button to change type to “ Parabolic
Curve ” (Figure 24).
Figure 24