Page 38 - Civil Engineering Formulas

(h + h 1 ) (II – d)]

Radius of gyration I (Bd + bd 1 ) + a = (Bc 1 3 – bh 3 + ac 2 3 ) ali 2 + bd 2 ali + bd II – c 1 I [Bd + a

I 1 2 1 = 2 = = r
c 1 2 c H 1 c 2 c

Moment of inertia and section modulus = (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) aH + B 1 d + b 1 d 1 a a 2 2 H d d b B

1
2
3
1
=
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
15