W14×99 vs W30×99
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×99 and W30×99 both weigh 99 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W30×99 is the deeper section at a nominal 30 in., versus 14 in.
W30×99 has the greater bending strength: section modulus Sx of 269 in³ versus 157, about 71% more.
| Property | W14×99 | W30×99 |
|---|---|---|
| Weight | 99 lb/ft | 99 lb/ft |
| Depth (d) | 14 1/8" | 29 5/8" |
| Flange width (bf) | 14 5/8" | 10 1/2" |
| Web thickness (tw) | 1/2" | 1/2" |
| Flange thickness (tf) | 3/4" | 11/16" |
| Area (A) | 29.1 in² | 29 in² |
| Moment of inertia (Ix) | 1110 in⁴ | 3990 in⁴ |
| Section modulus (Sx) | 157 in³ | 269 in³ |
| Plastic modulus (Zx) | 173 in³ | 312 in³ |
Open W14×99 in the interactive size chart →
Full detail: W14×99 · W30×99. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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