W30×148 vs W30×173
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W30×173 is the heavier section at 173 lb per foot, versus 148 for W30×148 (25 lb/ft more).
Both are nominally 30 in. deep.
W30×173 has the greater bending strength: section modulus Sx of 541 in³ versus 436, about 24% more.
| Property | W30×148 | W30×173 |
|---|---|---|
| Weight | 148 lb/ft | 173 lb/ft |
| Depth (d) | 30 5/8" | 30 1/2" |
| Flange width (bf) | 10 1/2" | 15" |
| Web thickness (tw) | 5/8" | 5/8" |
| Flange thickness (tf) | 1 3/16" | 1 1/16" |
| Area (A) | 43.6 in² | 50.9 in² |
| Moment of inertia (Ix) | 6680 in⁴ | 8230 in⁴ |
| Section modulus (Sx) | 436 in³ | 541 in³ |
| Plastic modulus (Zx) | 500 in³ | 607 in³ |
Open W30×148 in the interactive size chart →
Full detail: W30×148 · W30×173. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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