W14×99 vs W14×109
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×109 is the heavier section at 109 lb per foot, versus 99 for W14×99 (10 lb/ft more).
Both are nominally 14 in. deep.
W14×109 has the greater bending strength: section modulus Sx of 173 in³ versus 157, about 10% more.
| Property | W14×99 | W14×109 |
|---|---|---|
| Weight | 99 lb/ft | 109 lb/ft |
| Depth (d) | 14 1/8" | 14 3/8" |
| Flange width (bf) | 14 5/8" | 14 5/8" |
| Web thickness (tw) | 1/2" | 1/2" |
| Flange thickness (tf) | 3/4" | 7/8" |
| Area (A) | 29.1 in² | 32 in² |
| Moment of inertia (Ix) | 1110 in⁴ | 1240 in⁴ |
| Section modulus (Sx) | 157 in³ | 173 in³ |
| Plastic modulus (Zx) | 173 in³ | 192 in³ |
Open W14×99 in the interactive size chart →
Full detail: W14×99 · W14×109. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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