Civil Engineering Reference
In-Depth Information
Problem 15.2
16"
16"
4"
24"
17"
3 #11
3"
12"
Problem 15.3
(
Ans.
8.14 ft-k)
the cantilever 8 in. to one side of the beam
L
,
f
y
60,000
c
psi,
f
4000 psi.
4
"
P
D
=
18 k,
P
L
= 24 k
neglect beam weight
16
"
26
"
5 #10
6
"
5
"
6
"
5
"
10'
16
"
15.7
If the reinforced concrete spandrel beam shown in
the accompanying illustration has
4000 psi and
f
y
60,000 psi, determine the spacing required for #3 stirrups
at a distance
d
from the face of the support where
V
u
32 k and
T
u
10 ft-k. Clear cover
in. (
Ans.
5.87 ft-k
10 ft-k
Torsion reinf. reqd @ 7.81 in. on
center)
c
f
15.4
Repeat Problem 15.1 if the width is changed from
15 in. to 12 in. and the depth from 24 in. to 28 in.
1
2
c
15.5
Repeat Problem 15.3 if
f
3000 psi. (
Ans.
7.05 ft-k)
15.6
What minimum total theoretical depth is needed for
the 20-in.-wide beam shown if no torsional reinforcing is
to be used? The concentrated load is located at the end of
