W21×223 vs W21×248
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W21×248 is the heavier section at 248 lb per foot, versus 223 for W21×223 (25 lb/ft more).
Both are nominally 21 in. deep.
W21×248 has the greater bending strength: section modulus Sx of 576 in³ versus 520, about 11% more.
| Property | W21×223 | W21×248 |
|---|---|---|
| Weight | 223 lb/ft | 248 lb/ft |
| Depth (d) | 23 3/8" | 23 3/4" |
| Flange width (bf) | 12 5/8" | 12 3/4" |
| Web thickness (tw) | 1" | 1 1/8" |
| Flange thickness (tf) | 1 13/16" | 2" |
| Area (A) | 66.5 in² | 73.8 in² |
| Moment of inertia (Ix) | 6080 in⁴ | 6830 in⁴ |
| Section modulus (Sx) | 520 in³ | 576 in³ |
| Plastic modulus (Zx) | 601 in³ | 671 in³ |
Open W21×223 in the interactive size chart →
Full detail: W21×223 · W21×248. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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