W8×31 wide-flange beam
W8×31 weighs 31 lb per foot. Detailing dimensions and section properties below come from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.
Detailing dimensions
| Depth (d) | 8" |
|---|---|
| Flange width (bf) | 8" |
| Web thickness (tw) | 5/16" |
| Flange thickness (tf) | 7/16" |
| k (detailing) | 1 1/8" |
| Workable gage (g) | 5 1/2" |
Section properties
| Weight | 31 lb/ft |
|---|---|
| Area (A) | 9.13 in² |
| Ix | 110 in⁴ |
| Sx | 27.5 in³ |
| Zx | 30.4 in³ |
| rx | 3.47 in |
| Iy | 37.1 in⁴ |
| Sy | 9.27 in³ |
| Zy | 14.1 in³ |
| ry | 2.02 in |
| J | 0.536 in⁴ |
Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need W8×31 cut, formed, or fabricated? Huntington Steel & Supply Co.