W10×45 vs W10×49
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W10×49 is the heavier section at 49 lb per foot, versus 45 for W10×45 (4 lb/ft more).
Both are nominally 10 in. deep.
W10×49 has the greater bending strength: section modulus Sx of 54.6 in³ versus 49.1, about 11% more.
| Property | W10×45 | W10×49 |
|---|---|---|
| Weight | 45 lb/ft | 49 lb/ft |
| Depth (d) | 10 1/8" | 10" |
| Flange width (bf) | 8" | 10" |
| Web thickness (tw) | 3/8" | 5/16" |
| Flange thickness (tf) | 5/8" | 9/16" |
| Area (A) | 13.3 in² | 14.4 in² |
| Moment of inertia (Ix) | 248 in⁴ | 272 in⁴ |
| Section modulus (Sx) | 49.1 in³ | 54.6 in³ |
| Plastic modulus (Zx) | 54.9 in³ | 60.4 in³ |
Open W10×45 in the interactive size chart →
Full detail: W10×45 · W10×49. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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