Page 37 - Civil Engineering Formulas

Moment of inertia and section modulus Radius of gyration = (Bc 1 3 – B 1 h 3 + bc 2 3 – b 1 h 1 3 ) aH 2 + B 1d 2 + b 1d 1 (2H – d 1) I aH + B 1 d + b 1 d 1 (h + h 1 ) (Bd + bd 1 ) + a a a 1 = (Bc 1 3 – bh 3 + ac 2 3 ) I 2 2 2 1 ali 2 + bd 2 2 = c 1 c

1
2
1
3
=
c 1
I
a h H b B
H
B 1 2 d b 2
h
b 2 1 h a B (Continued)
Section b a B b 2
FIGURE 2.1
B 1 2 h
1
d
d
d
2
1
c
c
1
2
c
c
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