W12×305 vs W12×336
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W12×336 is the heavier section at 336 lb per foot, versus 305 for W12×305 (31 lb/ft more).
Both are nominally 12 in. deep.
W12×336 has the greater bending strength: section modulus Sx of 483 in³ versus 435, about 11% more.
| Property | W12×305 | W12×336 |
|---|---|---|
| Weight | 305 lb/ft | 336 lb/ft |
| Depth (d) | 16 3/8" | 16 7/8" |
| Flange width (bf) | 13 1/4" | 13 3/8" |
| Web thickness (tw) | 1 5/8" | 1 3/4" |
| Flange thickness (tf) | 2 11/16" | 2 15/16" |
| Area (A) | 89.5 in² | 98.9 in² |
| Moment of inertia (Ix) | 3550 in⁴ | 4060 in⁴ |
| Section modulus (Sx) | 435 in³ | 483 in³ |
| Plastic modulus (Zx) | 537 in³ | 603 in³ |
Open W12×305 in the interactive size chart →
Full detail: W12×305 · W12×336. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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