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. * | Neutral Axis Parallel to Flange. | Neutral Axis Square to Flange and Coincident With Stem. | ||||||||
Thickness. | Weight per Foot. | Area of Section. | Radius of Gyrat ion in Inches | Moment of Inertia. | Section Modulus. | Radius of Gyration in Inches. | ||||
In. | In. | Lb. | Sq. In. | In. | I. | Q. | R. | T. | Q'. | R'. |
6 X4 | 5/8 | 20.6 | 6.06 | 1.04 | 7.68 | 2.58 | 1.13 | 11.50 | 3.83 | 1.38 |
6 X4 | 1/2 | 17.0 | 5.00 | .99 | 6.37 | 2.11 | 1.13 | 9.22 | 3.07 | 1.34 |
5 X3 | 1/2 | 13.5 | 3.97 | .75 | 2.60 | 1.15 | .83 | 5.23 | 2.09 | 1.18 |
5 X2 1/2 | 3/8 | 10.4 | 3.07 | .57 | 1.24 | .64 | .64 | 4.24 | 1.70 | 1.18 |
4 1/2X3 | 3/8 | 10.0 | 3.00 | .75 | 2.10 | .94 | .86 | 3.10 | 1.38 | 1.04 |
4 1/2X3 | 5/16 | 8.5 | 2.55 | .73 | 1.80 | .81 | .87 | 2.60 | 1.16 | 1.03 |
4 X3i | 1/2 | 12.5 | 3.70 | 1.01 | 3.97 | 1.60 | 1.04 | 2.88 | 1.44 | .88 |
4 X3 1/2 | 3/8 | 9.8 | 2.88 | .92 | 3.20 | 1.24 | 1.05 | 2.18 | 1.09 | .87 |
4 X2 1/2 | 3/8 | 8.6 | 2.52 | .63 | 1.20 | .62 | .69 | 2.10 | 1.05 | .92 |
4 X2 | 3/8 | 7.9 | 2.31 | .48 | .60 | .40 | .52 | 2.12 | 1.06 | .96 |
3 1/2X4 | 1/2 | 12.8 | 3.75 | 1.25 | 5.50 | 1.98 | 1.21 | 1.89 | 1.08 | .72 |
3 1/2X4 | 3/8 | 9.9 | 2.91 | 1.19 | 4.30 | 1.55 | 1.22 | 1.42 | .81 | .70 |
3 X4 | 1/2 | 11.9 | 3.48 | 1.32 | 5.23 | 1.94 | 1.23 | 1.21 | .81 | .59 |
3 X3 1/2 | 1/2 | 10.9 | 3.21 | 1.12 | 3.50 | 1.49 | 1.06 | 1.20 | .80 | .62 |
3 X3 1/2 | 7/16 | 9.8 | 2.88 | 1.11 | 3.30 | 1.37 | 1.08 | 1.31 | .88 | .68 |
3 X3 1/2 | 3/8 | 8.5 | 2.49 | 1.09 | 2.90 | 1.21 | 1.09 | .93 | .62 | .61 |
3 X2 1/2 | 3/8 | 7.2 | 2.10 | .71 | 1.10 | .60 | .72 | .89 | .60 | .66 |
3 X2 1/2 | 5/16 | 6.1 | 1.80 | .68 | .94 | .52 | .73 | .75 | .50 | .65 |
3 X2 | 3/8 | 6.4 | 1.88 | .55 | .53 | .37 | .56 | .85 | .57 | .71 |
3 X 1 1/2 | 3/8 | 5.7 | 1.68 | .40 | .22 | .20 | .34 | .85 | .57 | .75 |
2 1/2X3 | 3/8 | 7.2 | 2.10 | .97 | 1.80 | .87 | .92 | .54 | .43 | .51 |
2 1/2X3 | 5/16 | 6.1 | 1.80 | .92 | 1.60 | .76 | .94 | .44 | .35 | .51 |
2 1/4X1 1/4 | 1/4 | 3.1 | .90 | .32 | .10 | .11 | .34 | .24 | .23 | .54 |
* Distance measured from outside of flange.
 
Continue to: