W16×45 vs W16×50
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W16×50 is the heavier section at 50 lb per foot, versus 45 for W16×45 (5 lb/ft more).
Both are nominally 16 in. deep.
W16×50 has the greater bending strength: section modulus Sx of 81 in³ versus 72.7, about 11% more.
| Property | W16×45 | W16×50 |
|---|---|---|
| Weight | 45 lb/ft | 50 lb/ft |
| Depth (d) | 16 1/8" | 16 1/4" |
| Flange width (bf) | 7" | 7 1/8" |
| Web thickness (tw) | 3/8" | 3/8" |
| Flange thickness (tf) | 9/16" | 5/8" |
| Area (A) | 13.3 in² | 14.7 in² |
| Moment of inertia (Ix) | 586 in⁴ | 659 in⁴ |
| Section modulus (Sx) | 72.7 in³ | 81 in³ |
| Plastic modulus (Zx) | 82.3 in³ | 92 in³ |
Open W16×45 in the interactive size chart →
Full detail: W16×45 · W16×50. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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