W40×503 vs W40×593
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W40×593 is the heavier section at 593 lb per foot, versus 503 for W40×503 (90 lb/ft more).
Both are nominally 40 in. deep.
W40×593 has the greater bending strength: section modulus Sx of 2340 in³ versus 1980, about 18% more.
| Property | W40×503 | W40×593 |
|---|---|---|
| Weight | 503 lb/ft | 593 lb/ft |
| Depth (d) | 42" | 43" |
| Flange width (bf) | 16 3/8" | 16 3/4" |
| Web thickness (tw) | 1 9/16" | 1 13/16" |
| Flange thickness (tf) | 2 3/4" | 3 1/4" |
| Area (A) | 148 in² | 174 in² |
| Moment of inertia (Ix) | 41600 in⁴ | 50400 in⁴ |
| Section modulus (Sx) | 1980 in³ | 2340 in³ |
| Plastic modulus (Zx) | 2320 in³ | 2760 in³ |
Open W40×503 in the interactive size chart →
Full detail: W40×503 · W40×593. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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