CIVIL ENGINEERING FORMULAS

FIGURE 2.1 (Continued)

Approximate values of least radius of gyrationr

D

D

D DD DCross

D

B

DD D

D

Carnegie

Phoenix column

column

r =

r =

0.3636D 0.295DD/4.58

D/4.74 D/5 BD/2.6 (B + D) D/4.74

D/3.54 D/6

Z-bar

I-beam

T-beam

Channel

Angle

Unequal legs

Angle

Equal legs

Deck

beam

19