W16×77 vs W16×89
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W16×89 is the heavier section at 89 lb per foot, versus 77 for W16×77 (12 lb/ft more).
Both are nominally 16 in. deep.
W16×89 has the greater bending strength: section modulus Sx of 155 in³ versus 134, about 16% more.
| Property | W16×77 | W16×89 |
|---|---|---|
| Weight | 77 lb/ft | 89 lb/ft |
| Depth (d) | 16 1/2" | 16 3/4" |
| Flange width (bf) | 10 1/4" | 10 3/8" |
| Web thickness (tw) | 7/16" | 1/2" |
| Flange thickness (tf) | 3/4" | 7/8" |
| Area (A) | 22.6 in² | 26.2 in² |
| Moment of inertia (Ix) | 1110 in⁴ | 1300 in⁴ |
| Section modulus (Sx) | 134 in³ | 155 in³ |
| Plastic modulus (Zx) | 150 in³ | 175 in³ |
Open W16×77 in the interactive size chart →
Full detail: W16×77 · W16×89. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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