W8×48 vs W8×58
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W8×58 is the heavier section at 58 lb per foot, versus 48 for W8×48 (10 lb/ft more).
Both are nominally 8 in. deep.
W8×58 has the greater bending strength: section modulus Sx of 52 in³ versus 43.2, about 20% more.
| Property | W8×48 | W8×58 |
|---|---|---|
| Weight | 48 lb/ft | 58 lb/ft |
| Depth (d) | 8 1/2" | 8 3/4" |
| Flange width (bf) | 8 1/8" | 8 1/4" |
| Web thickness (tw) | 3/8" | 1/2" |
| Flange thickness (tf) | 11/16" | 13/16" |
| Area (A) | 14.1 in² | 17.1 in² |
| Moment of inertia (Ix) | 184 in⁴ | 228 in⁴ |
| Section modulus (Sx) | 43.2 in³ | 52 in³ |
| Plastic modulus (Zx) | 49 in³ | 59.8 in³ |
Open W8×48 in the interactive size chart →
Full detail: W8×48 · W8×58. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
Browse more: size comparisons · Steel Beam Size Chart