W33×318 vs W33×354
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W33×354 is the heavier section at 354 lb per foot, versus 318 for W33×318 (36 lb/ft more).
Both are nominally 33 in. deep.
W33×354 has the greater bending strength: section modulus Sx of 1240 in³ versus 1110, about 12% more.
| Property | W33×318 | W33×354 |
|---|---|---|
| Weight | 318 lb/ft | 354 lb/ft |
| Depth (d) | 35 1/8" | 35 1/2" |
| Flange width (bf) | 16" | 16 1/8" |
| Web thickness (tw) | 1 1/16" | 1 3/16" |
| Flange thickness (tf) | 1 7/8" | 2 1/16" |
| Area (A) | 93.7 in² | 104 in² |
| Moment of inertia (Ix) | 19500 in⁴ | 22000 in⁴ |
| Section modulus (Sx) | 1110 in³ | 1240 in³ |
| Plastic modulus (Zx) | 1270 in³ | 1420 in³ |
Open W33×318 in the interactive size chart →
Full detail: W33×318 · W33×354. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
Browse more: size comparisons · Steel Beam Size Chart