Structural Shapes
"I"-Beam - Standard
I-Beam (American Standard)
S-Shapes ASTM-36
| Designation Depth in inches x weight Per Ft. Lbs |
Weight Per Ft. (Lbs.) |
Depth Section (inches) |
Width Flange (inches) |
Flange Thickness (average, inches) |
Web Thickness (inches) |
Area of Section (inches2) |
Section Modulus Sx In.3 |
**Surface Area Foot of Length2 |
|---|---|---|---|---|---|---|---|---|
| S3 x (3x2-3/8) |
5.7 | *3 | 2-3/8 | 1/4 | 3/16 | 1.67 | 1.68 | 1.16 |
| 7.5 | 3 | 2-1/2 | 1/4 | 3/8 | 2.21 | 1.95 | 1.19 | |
| S4 x (4x2-5/8) |
7.7 | 4 | 2-5/8 | 5/16 | 3/16 | 2.26 | 3.04 | 1.42 |
| 9.5 | 4 | 2-3/4 | 5/16 | 5/16 | 2.79 | 3.39 | 1.44 | |
| S5 x (5x3) |
10.00 | 5 | 3 | 5/16 | 3/16 | 2.94 | 4.92 | 1.69 |
| 14.75 | 5 | 3-1/4 | 5/16 | 1/2 | 4.34 | 6.09 | 1.85 | |
| S6 x (6x3-3/8) |
12.50 | 6 | 3-3/8 | 3/8 | 1/4 | 3.67 | 7.37 | 1.95 |
| 17.50 | 6 | 3-5/8 | 3/8 | 7/16 | 5.07 | 8.77 | 1.99 | |
| S7 x (7x3-5/8) |
15 | 7 | 3-5/8 | 3/8 | 1/4 | 4.50 | 10.50 | 2.21 |
| 20.0 | 7 | 3-7/8 | 3/8 | 7/16 | 5.88 | 12.10 | 2.38 | |
| S8 x (8x4) |
48.4 | 8 | 4 | 7/16 | 1/4 | 5.41 | 14.40 | 2.48 |
| 23.0 | 8 | 4-1/8 | 7/16 | 7/16 | 6.77 | 16.20 | 2.50 | |
| S10 x (10x4-5/8) |
25.4 | 10 | 4-5/8 | 1/2 | 5/16 | 7.46 | 24.70 | 3.00 |
| 35.0 | 10 | 5 | 1/2 | 5/8 | 10.30 | 29.40 | 3.05 | |
| S12 x (12x5) |
31.8 | 12 | 5 | 9/16 | 3/8 | 9.35 | 36.40 | 3.43 |
| 35.0 | 12 | 5-1/8 | 9/16 | 7/16 | 10.30 | 38.20 | 3.44 | |
| S12 x (12x5-1/4) |
40.8 | 12 | 5-1/4 | 11/16 | 7/16 | 12.00 | 45.40 | 3.47 |
| 50.0 | 12 | 5-1/2 | 11/16 | 11/16 | 14.70 | 50.80 | 3.51 | |
| S15 x (15x5-1/4) |
42.9 | 15 | 5-1/2 | 5/8 | 7/16 | 12.60 | 59.50 | 4.06 |
| 50.0 | 15 | 5-5/8 | 5/8 | 9/16 | 14.70 | 64.80 | 4.09 | |
| 518 x (18x6) |
54.7 | 18 | 6 | 11/16 | 7/16 | 16.10 | 89.40 | 4.70 |
| 70.0 | 18 | 6-1/4 | 11/16 | 11/16 | 20.60 | 103.00 | 4.74 | |
| S20 x (20x6-1/4) |
66.0 | 20 | 6-1/4 | 13/16 | 1/2 | 19.40 | 119.00 | 5.10 |
| 75.0 | 20 | 6-3/8 | 13/16 | 5/8 | 22.00 | 128.00 | 5.12 | |
| S20 x (20x7) |
86.0 | 20-1/4 | 7 | 15/16 | 11/16 | 25.30 | 155.0 | 5.38 |
| 96.0 | 20-1/4 | 7-1/4 | 15/16 | 13/16 | 28.20 | 165.00 | 5.40 | |
| S24 x (24x7) |
80.0 | 24 | 7 | 7/8 | 1/2 | 23.50 | 175.00 | 6.00 |
| 90.0 | 24 | 7-1/8 | 7/8 | 5/8 | 26.50 | 187.00 | 6.02 | |
| 100.0 | 24 | 7-1/4 | 7/8 | 3/4 | 29.30 | 199.00 | 6.04 | |
| S24 x (24x7-7/8) |
106.00 | 24-1/2 | 7-7/8 | 1-1/8 | 5/8 | 31.20 | 240.00 | 6.33 |
| 121.00 | 24-1/2 | 8 | 1-1/8 | 13/16 | 35.60 | 258.00 | 6.36 |
* APPROXIMATE DIMENSIONS FOR DETAILING ONLY
The rounding off of decimal dimensions to fractions can lead to an accumulation of differences. (See A.I.S.C. Manual)
** For painting and sandblasting surface area (all around) square foot (Ft2) of length.