©Copyright Task Force Tips LLC 2021
10
LIX-575 June 24, 2021 Rev00
3) Locate the value of
D1
on the appropriate side load chart for your installation and select a desired installation
Height
.
Note: There are four side load charts, one corresponding to each combination of waterway diameter and extension height.
These side load charts are located on the following pages.
4) Locate the value of
D2
on the appropriate side load chart corresponding to the selected installation
Height
.
5)
Determine the value of
D3
for the proposed installation.
6) Calculate the forces that will be exerted on the mounting brackets by the force of nozzle reaction with the proposed installa tion.
6A) Calculate the moment arm about the lower mounting bracket,
L
, by adding together
D1
,
D2
,
D3
, and
H2
:
L
=
D1
+
D2
+
D3
+
H2
6B) Determine
R
using the same side load chart referenced in
Step 3
.
6C) Calculate the torque exerted about the lower bracket by multiplying together
L
and
R
:
M
=
L
x
R
6D) Calculate the force on the upper bracket by dividing
M
by
D3
:
F1
=
M
/
D3
6E) Calculate the force on the lower bracket by subtracting
R
from
F1
:
F2
=
F1
-
R
7)
Verify the forces calculated in Step 6 are LESS THAN the maximum ratings for
F1
and
F2
listed in the table below.
If either value for
F1
and
F2
Height
and
D3
and repeat
Step 6
F1
and
F2
Model
3” Waterway
18” Extension
F1 Max
3100 lbf
F2 Max
2200 lbf
L
= + + +
L
= inches [in]
R
= pound-force [lbf]
M
= x
M
= pound
-
foot [lbf
•
ft]
F1
= /
F1
= pound-force [lbf]
F2
= -
F2
= pound-force [lbf]
D2
= inches [in]
D3
= inches [in]
XGC38
