W16×89 vs W16×100
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W16×100 is the heavier section at 100 lb per foot, versus 89 for W16×89 (11 lb/ft more).
Both are nominally 16 in. deep.
W16×100 has the greater bending strength: section modulus Sx of 175 in³ versus 155, about 13% more.
| Property | W16×89 | W16×100 |
|---|---|---|
| Weight | 89 lb/ft | 100 lb/ft |
| Depth (d) | 16 3/4" | 17" |
| Flange width (bf) | 10 3/8" | 10 3/8" |
| Web thickness (tw) | 1/2" | 9/16" |
| Flange thickness (tf) | 7/8" | 1" |
| Area (A) | 26.2 in² | 29.4 in² |
| Moment of inertia (Ix) | 1300 in⁴ | 1490 in⁴ |
| Section modulus (Sx) | 155 in³ | 175 in³ |
| Plastic modulus (Zx) | 175 in³ | 198 in³ |
Open W16×89 in the interactive size chart →
Full detail: W16×89 · W16×100. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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