W36×302 vs W36×318
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W36×318 is the heavier section at 318 lb per foot, versus 302 for W36×302 (16 lb/ft more).
Both are nominally 36 in. deep.
W36×302 has the greater bending strength: section modulus Sx of 1130 in³ versus 1110, about 2% more.
| Property | W36×302 | W36×318 |
|---|---|---|
| Weight | 302 lb/ft | 318 lb/ft |
| Depth (d) | 37 3/8" | 38 1/4" |
| Flange width (bf) | 16 5/8" | 12 3/8" |
| Web thickness (tw) | 15/16" | 1 3/16" |
| Flange thickness (tf) | 1 11/16" | 2 1/8" |
| Area (A) | 89 in² | 93.4 in² |
| Moment of inertia (Ix) | 21100 in⁴ | 21200 in⁴ |
| Section modulus (Sx) | 1130 in³ | 1110 in³ |
| Plastic modulus (Zx) | 1280 in³ | 1300 in³ |
Open W36×302 in the interactive size chart →
Full detail: W36×302 · W36×318. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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