Civil Engineering Reference
In-Depth Information
Bearing Pressure for Strength Design
(1.2)(20)
(1.6)(15)
10.00
q
u
4.80 ksf
Depth Required for Shear at a Distance
d
from Face of Wall (Figure 12.6)
Figure 12.6
10.00
2
6
12
8.5
V
u
(4.80)
18.20 k
12
18,200
(0.75)(2
3000)(12)
18.46
3.5
21.96
12
d
Try again
Assume 20-in. Footing (
d
16.5 in.)
20
12
28
12
q
e
4000
(150)
(100)
3517 psf
35
3.517
Width required
9.95 ft
Say 10
0
Bearing Pressure for Strength Design
q
u
(1.2)(20)
(1.6)(15)
10.00
4.80 ksf
Depth Required for Shear
10.00
2
6
16.50
12
V
u
12
(4.80)
15.0 k
15,000
(0.75)(2
d
3000)(12)
15.21
3.5
18.71
Use 20
total depth
(
A
subsequent
check
of
a
19-
in
.
footing
shows
it
will
not
quite
work
as
to
depth
.)
