This section is from the book "The Building Trades Pocketbook", by International Correspondence Schools. Also available from Amazon: Building Trades Pocketbook: a Handy Manual of reference on Building Construction.
Distance of Center of Gravity From Flange.* | Parallel to Flange. | Natural Axis Square to Flange and Coincident With Stem. | ||||||||
Size of T. Flange by Stem. | Thickness. | Weight Per Foot. | Area of Section. | Radius of Gyration. Inches. | Moment of Inertia. | Section Modulus. | Radius of Gyration. Inches. | |||
In. | In. | Lb. | Sq. In. | In. | J. | Q | R. | T. | Q' | R'. |
4 X4 | 1/2 | 13.60 | 4.00 | 1.18 | 5.70 | 2.02 | 1.20 | 2.80 | 1.40 | .84 |
4 X4 | 3/8 | 10.40 | 3.07 | 1.15 | 4.70 | 1.64 | 1.23 | 2.19 | 1.09 | .85 |
3 1/2X3 1/2 | 1/2 | 11.70 | 3.45 | 1.06 | 3.72 | 1.52 | 1.04 | 1.89 | 1.08 | .74 |
3 1/2X3 1/2 | 7/16 | 10.40 | 3.07 | 1.03 | 3.35 | 1.35 | 1.05 | 1.65 | .94 | .73 |
3 1/2X3 1/2 | 5/16 | 6.80 | 2.04 | .98 | 2.30 | .93 | 1.09 | 1.07 | .61 | .73 |
3 X3 | 1/2 | 10.00 | 2.94 | .93 | 2.31 | 1.10 | .88 | 1.20 | .80 | .64 |
3 X3 | 7/16 | 9.10 | 2.67 | .92 | 2.12 | 1.01 | .90 | 1.08 | .72 | .64 |
3 X3 | 3/8 | 7.80 | 2.28 | .88 | 1.81 | .86 | .90 | .90 | .60 | .63 |
3 X3 | 5/16 | 6.60 | 1.95 | .86 | 1.60 | .74 | .90 | .75 | .50 | .62 |
2 1/2X2 1/2 | 3/8 | 6.40 | 1.89 | .76 | 1.00 | .59 | .74 | .52 | .42 | .53 |
2 1/2X2 1/2 | 5/16 | 5.50 | 1.62 | .74 | .87 | .50 | .74 | .44 | .35 | .52 |
2 1/4X2 1/4 | 5/16 | 4.90 | 1.44 | .69 | .66 | .42 | .68 | .33 | .30 | .48 |
2 1/4X2 1/4 | 1/4 | 4.10 | 1.20 | .66 | .51 | .32 | .67 | .25 | .22 | .47 |
2 X2 | 5/16 | 4.30 | 1.26 | .63 | .45 | .33 | .60 | .23 | .23 | .43 |
2 X2 | 1/4 | 3.70 | 1.08 | .59 | .36 | .25 | .60 | .18 | .18 | .42 |
1 3/4X1 3/4 | 1/4 | 3.10 | .90 | .54 | .23 | .19 | .51 | .12 | .14 | .37 |
1 3/4x1 3/4 | 3/16 | 2.25 | .66 | .52 | .17 | .14 | .51 | .09 | .10 | .37 |
1 1/2x1 1/2 | 1/4 | 2.55 | .75 | .42 | .15 | .14 | .49 | .08 | .10 | .34 |
1 1/2x1 1/2 | 3/16 | 1.85 | .54 | .44 | .11 | .11 | .45 | .06 | .07 | .31 |
1 1/4X1 1/4 | 1/4 | 2.04 | .60 | .40 | .08 | .10 | .36 | .05 | .07 | .27 |
1 1/4x1 1/4 | 3/16 | 1.55 | .45 | .38 | .06 | .07 | .37 | .03 | .05 | .26 |
1 XI | 3/16 | 1.23 | .36 | .32 | .03 | .05 | .29 | .02 | .04 | .21 |
1 XI | 1/8 | .90 | .26 | .29 | .02 | .03 | .29 | .01 | .02 | .21 |
* Distance measured from outside of flange.
 
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