CIVIL ENGINEERING FORMULAS

b

2

b

2

b

2

b

2

B

2

B

2

h

Hh h H H

c

h

c

H H h H h

B

B b

b

bb

BB B

BH^3 + bh^3

12

BH^3 – bh^3

12

BH^3 + bh^3

6 H

BH^3 – bh^3

6 H

I =

I

c=

I =

=

BH^3 + bh^3

12 (BH + bh)

BH^3 – bh^3

I 12 (BH – bh)

c

Section Moment of inertia Section modulus Radius of gyration

14