2.0

Table Of Contents
Chapter 4 Working with Cross Sections
464
The prismoidal method calculation is:
Total sum of cut (or fill) area at first station (A1), cut (or fill) area at second
station (A2) plus the square root value of A1*A2. Divide the total sum by 3
and multiply by the distance between the two sections.
A prompt is displayed asking if you want to use curve correction.
6 Specify whether to use curve correction:
n
Type Y to use curve correction.
n
Type N to skip this option.
In normal volume calculations, the length between the end areas on horizontal
curves is taken from the length along the centerline curve. With curve
correction in use, the length is taken from the path of the average centroid of
the areas for a more accurate result.
The following prompt is displayed:
Use volume adjustment factors (Yes/No) <Yes>:
7 Specify whether to use volume adjustment factors:
n
Type Y to use volume adjustment factors. You are then prompted for the cut
and fill adjustment factors.
n
Type N to skip this option.
NOTE
The values you enter against these prompts are not used in calculating the
Strip surface volumes. The adjustment factors entered in the Design
Control
ä
Volume Adjustment Factors command are used exclusively. If no
data is entered for any or all of the surfaces, then an adjustment factor of 1
is applied.
You are prompted to enter the name of the strip surface.
8 Enter the name of the strip surface.
The outer limits of the strip areas are determined either by the right-of-way
offsets (Row) or by the catch points of the match slopes (Catch). Specify which
limits to use at the Strip to (Row/Catch) <Catch> prompt.
9 Specify the range of stations to process.
The defaults for the beginning and ending stations are based on the starting and
ending stations of the current alignment. The command passes through the
sections to determine the surface conditions. If several surfaces are being
calculated, then the volumes of each surface are reported separately.
To view a table listing the section codes used in the ASCII text file, see
Outputting the Section Data for a Range of Stations to an ASCII File in this
chapter.
To view a sample output file, see Stripping Volume Data for the Strip Surface 
Sample Output File in this chapter.