Trilogy Nebula - Step 2. Pool Layout and Measurement; Rectangle Layout and Squareness; Step 3. Elevation and Grading; Determining Highest Corner

When laying out the pool, note that the dimensions are to the outside edge of the pool coping. Most permit
plans are measured to the waters edge. The coping of a Trilogy Pool is approximately 6” on all sides. There is a differ-
ence of 12” between the length and width dimensions in the installation guide and those of the permit plans. Depend-
ing on the customer and the local building inspector, this fact can be a critical consideration. Distances between the
water’s edge to most property lines, electrical lines, and other structures such as houses, garages, sheds and patios
must be exact to plan specications.
Start with a 14’ wide by 30’ long rectangle with diagonal measurements of 33’ 1” (the diagonal measurements
insure that your layout is square). Place stakes in the ground at each corner of the rectangle, then place the remaining
stakes in the ground as shown in Figure 1. Connect the stakes with string. Use spray paint to follow the contour of the
string. Remove the string and stakes, leaving only the outline of the pool.
Elevation and grade of the pool area are two of the most often overlooked or miscalculated variables in the
installation process. While considering all the variables concerning elevation and grade, always remember that you want
water to run away from the pool. Before excavation, use the provided Installation Planning Guide to calculate all critical
measurements (Form 1).
Check the four corners of the pool layout with the aid of a transit level or a sight level to determine the highest
corner. This corner will be used in planning the elevation of the pool. In a typical installation, the elevation of the pool
should be 4-6 inches above the existing grade around the pool. However, careful consideration should be given to pool
type, size and drainage of the future pool deck, as well as the elevation of the surrounding landscape and existing struc-
tures, patios and sidewalks.
Step 2.
POOL LAYOUT
Step 3.
ELEVATION
FIG. 1
23'
18'-10"
17'-2"
15'-6"
11'-7"
5'-7"
4'-2"
4'-1"
7'
14'
19'-1"
17'-6"
15'-10"
12'-6"
9'-9"
8'-4"
6'-11"
4'-6"
6'-6"
4'-6"
8"
9"
5'-6"
1'-2"
1'-1"
1'-3"
1'-8"
10"
3'-5"
14'
STAKES -
33'-1"
R2'-9"
R6'-6"
R1'-7"
R4'-6"
R2'-9"
R5'-6"
R2'-9"
R7'
1'-4 9/16"
1'-4 3/8"
30'
2'x2'
3' DP
4'-6"