Civil Engineering Reference
In-Depth Information
Problem 2.29
(
Ans.
845.5 ft-k)
24"
30"
6 #10
3"
3"
18"
For Problems 2.30 to 2.34 determine the nominal moment capacity
M
n
for each of the rectangular beams.
Prob. No.
c
b
(in.)
d
(in.)
Bars
f
(ksi)
f
y
(ksi)
Ans.
2.30
18
25.5
4 #10
3.0
60
—
2.31
16
27
8 # 9
4.0
60
903.6 ft-k
2.32
15
21
3 #11
4.5
60
—
2.33
21
28
4 #10
5.0
75
818.3 ft-k
2.34
18
33
6 #10
4.0
60
—
Problem 2.36
For Problems 2.35 to 2.39, determine
M
n
if
f
y
60,000
psi and
c
f
4000 psi.
10"
14"
10"
Problem 2.35
(
Ans.
704 ft-k)
4"
24"
10"
4"
4 #10
7"
3"
33"
26"
20"
2.37
Repeat Problem 2.35 if four #11 bars are used. (
Ans.
865 ft-k)
5 #9
3"
2.38
Compute
M
n
for the beam of Problem 2.36 if six #10
bars are used.
16"
