Civil Engineering Reference
In-Depth Information
Figure 5.5
Computing
T
T
A
s
f
y
(10.12)(60)
607.2 k
Determining
A
c
and its c.g.
T
0.85
f
607.2
(0.85)(4)
178.59 in.
2
A
c
c
flange area
(30)(4)
120 in.
2
Obviously, the stress block must extend below the flange to provide the necessary compression
area
178.6
120
58.6 in.
2
,
as shown in Figure 5.6
.
Computing the Distance
y
from the Top of the Flange to the Center of Gravity of
A
c
4
4.19
2
(120)(2)
(58.6)
y
3.34 in.
178.6
120 in.
2
4"
y
58.6
14
58.6 in.
2
= 4.19"
30"
8 #10
(10.12 in.
2
)
14"
Figure 5.6
