W27×258 vs W27×281
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W27×281 is the heavier section at 281 lb per foot, versus 258 for W27×258 (23 lb/ft more).
Both are nominally 27 in. deep.
W27×281 has the greater bending strength: section modulus Sx of 814 in³ versus 745, about 9% more.
| Property | W27×258 | W27×281 |
|---|---|---|
| Weight | 258 lb/ft | 281 lb/ft |
| Depth (d) | 29" | 29 1/4" |
| Flange width (bf) | 14 1/4" | 14 3/8" |
| Web thickness (tw) | 1" | 1 1/16" |
| Flange thickness (tf) | 1 3/4" | 1 15/16" |
| Area (A) | 76.1 in² | 83.1 in² |
| Moment of inertia (Ix) | 10800 in⁴ | 11900 in⁴ |
| Section modulus (Sx) | 745 in³ | 814 in³ |
| Plastic modulus (Zx) | 852 in³ | 936 in³ |
Open W27×258 in the interactive size chart →
Full detail: W27×258 · W27×281. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
Browse more: size comparisons · Steel Beam Size Chart