W6×12 vs W6×15
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W6×15 is the heavier section at 15 lb per foot, versus 12 for W6×12 (3 lb/ft more).
Both are nominally 6 in. deep.
W6×15 has the greater bending strength: section modulus Sx of 9.72 in³ versus 7.31, about 33% more.
| Property | W6×12 | W6×15 |
|---|---|---|
| Weight | 12 lb/ft | 15 lb/ft |
| Depth (d) | 6" | 6" |
| Flange width (bf) | 4" | 6" |
| Web thickness (tw) | 1/4" | 1/4" |
| Flange thickness (tf) | 1/4" | 1/4" |
| Area (A) | 3.55 in² | 4.43 in² |
| Moment of inertia (Ix) | 22.1 in⁴ | 29.1 in⁴ |
| Section modulus (Sx) | 7.31 in³ | 9.72 in³ |
| Plastic modulus (Zx) | 8.3 in³ | 10.8 in³ |
Open W6×12 in the interactive size chart →
Full detail: W6×12 · W6×15. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
Browse more: size comparisons · Steel Beam Size Chart