W21×93 vs W21×101
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W21×101 is the heavier section at 101 lb per foot, versus 93 for W21×93 (8 lb/ft more).
Both are nominally 21 in. deep.
W21×101 has the greater bending strength: section modulus Sx of 227 in³ versus 192, about 18% more.
| Property | W21×93 | W21×101 |
|---|---|---|
| Weight | 93 lb/ft | 101 lb/ft |
| Depth (d) | 21 5/8" | 21 3/8" |
| Flange width (bf) | 8 3/8" | 12 1/4" |
| Web thickness (tw) | 9/16" | 1/2" |
| Flange thickness (tf) | 15/16" | 13/16" |
| Area (A) | 27.3 in² | 29.8 in² |
| Moment of inertia (Ix) | 2070 in⁴ | 2420 in⁴ |
| Section modulus (Sx) | 192 in³ | 227 in³ |
| Plastic modulus (Zx) | 221 in³ | 253 in³ |
Open W21×93 in the interactive size chart →
Full detail: W21×93 · W21×101. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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