W14×283 vs W18×283
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×283 and W18×283 both weigh 283 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W18×283 is the deeper section at a nominal 18 in., versus 14 in.
W18×283 has the greater bending strength: section modulus Sx of 565 in³ versus 459, about 23% more.
| Property | W14×283 | W18×283 |
|---|---|---|
| Weight | 283 lb/ft | 283 lb/ft |
| Depth (d) | 16 3/4" | 21 7/8" |
| Flange width (bf) | 16 1/8" | 11 7/8" |
| Web thickness (tw) | 1 5/16" | 1 3/8" |
| Flange thickness (tf) | 2 1/16" | 2 1/2" |
| Area (A) | 83.3 in² | 83.3 in² |
| Moment of inertia (Ix) | 3840 in⁴ | 6170 in⁴ |
| Section modulus (Sx) | 459 in³ | 565 in³ |
| Plastic modulus (Zx) | 542 in³ | 676 in³ |
Open W14×283 in the interactive size chart →
Full detail: W14×283 · W18×283. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
Browse more: size comparisons · Steel Beam Size Chart