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10
Hints on setting the corner ground posts:
Use the following diagrams to help you set the corner posts in a perfect rectangle.
A
B
A > B
Tunnel is
crooked.
A
B
A = B
Tunnel is
squared off.
3. Measure out from
C2 the desired
tunnel length.
24 ft.
4. Make a mark at that
measurement spot at
what looks to be
square with the
opposite end of the
tunnel.
1. Set the first
corner post C1.
2. Using a tape measure,
set the second corner
post C2.
7. Take measurements A and B above.
8. While maintaining the 24 ft. width,
adjust the two marks to the right
or left until A and B are equal.
9. Set corner posts C3 and C4.
C1
C2
C4
C3
C1
C2
C1
C2
Start here.
5. Measure out from
C1 the desired
tunnel length.
6. Make a mark at that
distance that is also 24
ft. from the mark
made in step 4.
Tunnel forms
a perfect
rectangle.
C1
C2
X
X
X
X
X
X
7617.999 Rev 06/21/2021 | AL, JG, ms