Civil Engineering Reference
In-Depth Information
1/
2
"
8"
18"
12"
4"
1-1/2"
9"
9"
12"
FIGURE E6.7
r
x
=
4.29 in.
5.14 in.
4
I
y
=
2.06 in.
3
S
y
=
r
y
=
0.763 in.
x
=
0.67 in.
For cover plated member:
25.6 in.
2
A
=
2
(
8.82
)
+
2
(
12
)(
0.5
)
−
2
(
4
)(
1
/
2
)
=
2
(
8
)(
0.5
)(
6.25
)
2
2
(
8
)(
0.5
)
3
/
12
637 in.
4
I
x
=
2
(
162
)
+
+
=
637
25.6
=
r
x
=
5.00 in.
0.67
)
2
2
(
2
)(
4
)
3
(
0.5
)/
12
2
)
2
I
y
=
2
(
5.14
)
+
2
(
8.82
)(
3
+
+
+
2
(
2
)(
4
)(
0.5
)(
2
+
387 in.
4
=
387
25.6
=
r
y
=
3.89 in.
L
r
min
=
(
19.55
)(
12
)
3.89
=
60.4
≤
100 OK
5.034
E
KL
r
min
=
0.75
(
19.55
)(
12
)
3.89
=
45.3
≤
F
y
≤
121
0.629
E
KL
r
min
=
45.3
≥
F
y
≥
15
