W40×183 vs W40×199
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W40×199 is the heavier section at 199 lb per foot, versus 183 for W40×183 (16 lb/ft more).
Both are nominally 40 in. deep.
W40×199 has the greater bending strength: section modulus Sx of 770 in³ versus 675, about 14% more.
| Property | W40×183 | W40×199 |
|---|---|---|
| Weight | 183 lb/ft | 199 lb/ft |
| Depth (d) | 39" | 38 5/8" |
| Flange width (bf) | 11 3/4" | 15 3/4" |
| Web thickness (tw) | 5/8" | 5/8" |
| Flange thickness (tf) | 1 3/16" | 1 1/16" |
| Area (A) | 53.3 in² | 58.8 in² |
| Moment of inertia (Ix) | 13200 in⁴ | 14900 in⁴ |
| Section modulus (Sx) | 675 in³ | 770 in³ |
| Plastic modulus (Zx) | 774 in³ | 869 in³ |
Open W40×183 in the interactive size chart →
Full detail: W40×183 · W40×199. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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