W21×182 vs W36×182
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W21×182 and W36×182 both weigh 182 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W36×182 is the deeper section at a nominal 36 in., versus 21 in.
W36×182 has the greater bending strength: section modulus Sx of 623 in³ versus 417, about 49% more.
| Property | W21×182 | W36×182 |
|---|---|---|
| Weight | 182 lb/ft | 182 lb/ft |
| Depth (d) | 22 3/4" | 36 3/8" |
| Flange width (bf) | 12 1/2" | 12 1/8" |
| Web thickness (tw) | 13/16" | 3/4" |
| Flange thickness (tf) | 1 1/2" | 1 3/16" |
| Area (A) | 53.6 in² | 53.6 in² |
| Moment of inertia (Ix) | 4730 in⁴ | 11300 in⁴ |
| Section modulus (Sx) | 417 in³ | 623 in³ |
| Plastic modulus (Zx) | 476 in³ | 718 in³ |
Open W21×182 in the interactive size chart →
Full detail: W21×182 · W36×182. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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