Civil Engineering Reference
In-Depth Information
Figure 8.14
V
u
at a distance
d
from face of support
78,300 lb as determined by proportions from Figure 8.14:
V
u
V
c
V
s
V
s
V
u
V
c
78,300
(0.75)(42,691)
46,282 lb at left end
V
s
46,282
0.75
61,709 lb
The limiting spacings are the same as in Example 8.3. The theoretical spacings are given in the
following table:
Theoretical
V
s
V
u
V
c
Distance from
spacing required
V
u
face of support
s
A
v
f
y
d
V
s
(ft.)
(lb.)
(lb.)
(in.)
0 to
d
1.875
78,300
61,709
4.81
2
76,800
59,709
4.97
3
64,800
43,709
6.79
4
52,800
27,709
10.71
5
40,800
11,709
Maximum 11.25
One possible arrangement (#4 stirrups might be better)
1 @ 3 in.
3 in.
7 @ 4 in.
28 in.
2 @ 6 in.
12 in.
4 @ 9 in.
36 in.
6 ft 7 in.
symmetrical about
L
