W12×65 vs W12×72
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W12×72 is the heavier section at 72 lb per foot, versus 65 for W12×65 (7 lb/ft more).
Both are nominally 12 in. deep.
W12×72 has the greater bending strength: section modulus Sx of 97.4 in³ versus 87.9, about 11% more.
| Property | W12×65 | W12×72 |
|---|---|---|
| Weight | 65 lb/ft | 72 lb/ft |
| Depth (d) | 12 1/8" | 12 1/4" |
| Flange width (bf) | 12" | 12" |
| Web thickness (tw) | 3/8" | 7/16" |
| Flange thickness (tf) | 5/8" | 11/16" |
| Area (A) | 19.1 in² | 21.1 in² |
| Moment of inertia (Ix) | 533 in⁴ | 597 in⁴ |
| Section modulus (Sx) | 87.9 in³ | 97.4 in³ |
| Plastic modulus (Zx) | 96.8 in³ | 108 in³ |
Open W12×65 in the interactive size chart →
Full detail: W12×65 · W12×72. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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