W40×264 vs W40×277
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W40×277 is the heavier section at 277 lb per foot, versus 264 for W40×264 (13 lb/ft more).
Both are nominally 40 in. deep.
W40×277 has the greater bending strength: section modulus Sx of 1100 in³ versus 971, about 13% more.
| Property | W40×264 | W40×277 |
|---|---|---|
| Weight | 264 lb/ft | 277 lb/ft |
| Depth (d) | 40" | 39 3/4" |
| Flange width (bf) | 11 7/8" | 15 7/8" |
| Web thickness (tw) | 15/16" | 13/16" |
| Flange thickness (tf) | 1 3/4" | 1 9/16" |
| Area (A) | 77.4 in² | 81.5 in² |
| Moment of inertia (Ix) | 19400 in⁴ | 21900 in⁴ |
| Section modulus (Sx) | 971 in³ | 1100 in³ |
| Plastic modulus (Zx) | 1130 in³ | 1250 in³ |
Open W40×264 in the interactive size chart →
Full detail: W40×264 · W40×277. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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