W18×211 vs W30×211
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W18×211 and W30×211 both weigh 211 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W30×211 is the deeper section at a nominal 30 in., versus 18 in.
W30×211 has the greater bending strength: section modulus Sx of 665 in³ versus 419, about 59% more.
| Property | W18×211 | W30×211 |
|---|---|---|
| Weight | 211 lb/ft | 211 lb/ft |
| Depth (d) | 20 5/8" | 31" |
| Flange width (bf) | 11 1/2" | 15 1/8" |
| Web thickness (tw) | 1 1/16" | 3/4" |
| Flange thickness (tf) | 1 15/16" | 1 5/16" |
| Area (A) | 62.3 in² | 62.3 in² |
| Moment of inertia (Ix) | 4330 in⁴ | 10300 in⁴ |
| Section modulus (Sx) | 419 in³ | 665 in³ |
| Plastic modulus (Zx) | 490 in³ | 751 in³ |
Open W18×211 in the interactive size chart →
Full detail: W18×211 · W30×211. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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