W12×72 vs W12×79
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W12×79 is the heavier section at 79 lb per foot, versus 72 for W12×72 (7 lb/ft more).
Both are nominally 12 in. deep.
W12×79 has the greater bending strength: section modulus Sx of 107 in³ versus 97.4, about 10% more.
| Property | W12×72 | W12×79 |
|---|---|---|
| Weight | 72 lb/ft | 79 lb/ft |
| Depth (d) | 12 1/4" | 12 3/8" |
| Flange width (bf) | 12" | 12 1/8" |
| Web thickness (tw) | 7/16" | 1/2" |
| Flange thickness (tf) | 11/16" | 3/4" |
| Area (A) | 21.1 in² | 23.2 in² |
| Moment of inertia (Ix) | 597 in⁴ | 662 in⁴ |
| Section modulus (Sx) | 97.4 in³ | 107 in³ |
| Plastic modulus (Zx) | 108 in³ | 119 in³ |
Open W12×72 in the interactive size chart →
Full detail: W12×72 · W12×79. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
Browse more: size comparisons · Steel Beam Size Chart