Agriculture Reference
In-Depth Information
L e v e l A r e a
L e v e l A r e a
1 0 6 . 5
1 0 6 . 5
Figures 12.4-a and 12.4-B
Figure 12.4-A is a plan view of the contours shown in Figure 12.4-B
the finish floor elevation in this example, the average slope is calculated
as follows:
104.5 − 102. 5 = 2.0'
2.0' / 2 = 1.0' then
Add the result of 1.0´ to 102.5 = 103.5. This is your initial elevation
for the proposed building.
Once the finish floor elevation is determined, the other existing
contours would be manipulated following the example in Figure 12.1-D.
SiGnature SoLution: creatinG a
SLopinG Surface
Grading an existing site to accommodate a building, a paved surface for
a parking lot, or a sports field considers two basic grading operations: (1)
creating a level or moderate sloping surface, and (2) collecting and direct-
ing surface drainage to direct excess water away from the level surface
being prepared for a structure, paved surface, or sports field. Figure 12.1-D
is a diagram that combines the two grading procedures: creating a level or
sloping surface and creating a swale to carry surface water away from the
level area. Figure 12.4-A represents what this grading operation would look
like in plan, and Figure 12.4-B overlays the grading plan with its contours
