Agriculture Reference
In-Depth Information
B
B
A
A
E
F
D
C
1/2%
H
G
Figure 12.18-a
Step One
fiGure AdApted usinG iMAGe Courtesy of sAdik ArtunC
Figure 12.18-B
Step Two
fiGure AdApted usinG iMAGe Courtesy of sAdik ArtunC
Assuming that the .5 percent cross slope continues for the tennis
court (along a line drawn between points F and G), we can find the pro-
posed elevations for the two upper corners of the tennis court. Using the
formula S = V / H, plug in the .5 percent slope for S, measure the distance
H from spot elevations to the respective corners, then solve for V. Point
F = 97.86´, and point G = 97.55´. Next calculate points G and H considering
the slope from point E to G is 1 percent and the distance H is 120 feet.
S = V / H
.01 - V / 120
V = 120 × .01 = 1.2'
Point E elevation is 97.86'
Point G elevation is 97.86' - 1.2' = 96.66' and
Point H elevation is 97.55' - 1.2' = 96.35'
Now that we know the elevations of the two lower corners of the
tennis court (points G and H), we might then see that elevation or con-
tour 97´ falls somewhere between the two upper and lower corners. To
ind the location of contour 97´, let's irst ind its location between E and
G, then between F and H: We need to calculate the horizontal distance H
in both cases.
