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Flagpole Footing Design Based on Chapter 18 both IBC & UBC
INPUT DATA & DESIGN SUMMARY
IS FOOTING RESTRAINED @ GRADE LEVEL ?
(1=YES,0=NO)
LATERAL FORCE @ TOP OF POLE
P =
HEIGHT OF POLE ABOVE GRADE
H =
DIAMETER OF POLE FOOTING
B =
LATERAL SOIL BEARING CAPACITY
S =
ISOLATED POLE FACTOR (IBC 1804.3.1 or UBC note 3 on Tab 18-I-A)
F =
FIRST TRIAL DEPTH
D =
Units ? ( English = 1, Metric = 2 )
ANALYSIS
NONCONSTRAINED
CONSTRAINED
LATERAL FORCE @ TOP OF POLE
P
=>
HEIGHT OF POLE ABOVE GRADE
H
=>
DIAMETER OF POLE FOOTING
B
=>
LATERAL SOIL BEARING CAPACITY
FS
=>
1ST TRIAL
TRY D
1
=>
LAT SOIL BEARING @ 1/3 D
S
1
=>
LAT SOIL BEARING @ 1.0 D
S
3
=>
CONSTANT 2.34P/(BS
1
)
A
=>
-
-
REQD FOOTING DEPTH
RQRD D =>
2ND TRIAL :
TRY D2=>
LAT SOIL BEARING @ 1/3 D
S
1
=>
LAT SOIL BEARING @ 1.0 D
S
3
=>
CONSTANT 2.34P/(BS
1
)
A
=>
-
-
REQD FOOTING DEPTH
RQRD D =>
3RD TRIAL :
TRY D3=>
LAT SOIL BEARING @ 1/3 D
S
1
=>
LAT SOIL BEARING @ 1.0 D
S
3
=>
CONSTANT 2.34P/(BS
1
)
A
=>
-
-
REQD FOOTING DEPTH
RQRD D =>
4TH TRIAL :
TRY D4=>
LAT SOIL BEARING @ 1/3 D
S
1
=>
LAT SOIL BEARING @ 1.0 D
S
3
=>
CONSTANT 2.34P/(BS
1
)
A
=>
-
-
REQD FOOTING DEPTH
RQRD D =>
5TH TRIAL :
TRY D5=>
LAT SOIL BEARING @ 1/3 D
S
1
=>
LAT SOIL BEARING @ 1.0 D
S
3
=>
CONSTANT 2.34P/(BS
1
)
A
=>
-
-
REQD FOOTING DEPTH
RQRD D =>
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