W14×370 vs W14×398
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×398 is the heavier section at 398 lb per foot, versus 370 for W14×370 (28 lb/ft more).
Both are nominally 14 in. deep.
W14×398 has the greater bending strength: section modulus Sx of 656 in³ versus 607, about 8% more.
| Property | W14×370 | W14×398 |
|---|---|---|
| Weight | 370 lb/ft | 398 lb/ft |
| Depth (d) | 17 7/8" | 18 1/4" |
| Flange width (bf) | 16 1/2" | 16 5/8" |
| Web thickness (tw) | 1 11/16" | 1 3/4" |
| Flange thickness (tf) | 2 11/16" | 2 7/8" |
| Area (A) | 109 in² | 117 in² |
| Moment of inertia (Ix) | 5440 in⁴ | 6000 in⁴ |
| Section modulus (Sx) | 607 in³ | 656 in³ |
| Plastic modulus (Zx) | 736 in³ | 801 in³ |
Open W14×370 in the interactive size chart →
Full detail: W14×370 · W14×398. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
Browse more: size comparisons · Steel Beam Size Chart