W12×252 vs W12×279
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W12×279 is the heavier section at 279 lb per foot, versus 252 for W12×252 (27 lb/ft more).
Both are nominally 12 in. deep.
W12×279 has the greater bending strength: section modulus Sx of 393 in³ versus 353, about 11% more.
| Property | W12×252 | W12×279 |
|---|---|---|
| Weight | 252 lb/ft | 279 lb/ft |
| Depth (d) | 15 3/8" | 15 7/8" |
| Flange width (bf) | 13" | 13 1/8" |
| Web thickness (tw) | 1 3/8" | 1 1/2" |
| Flange thickness (tf) | 2 1/4" | 2 1/2" |
| Area (A) | 74.1 in² | 81.9 in² |
| Moment of inertia (Ix) | 2720 in⁴ | 3110 in⁴ |
| Section modulus (Sx) | 353 in³ | 393 in³ |
| Plastic modulus (Zx) | 428 in³ | 481 in³ |
Open W12×252 in the interactive size chart →
Full detail: W12×252 · W12×279. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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