W8x58 is a wide flange steel beam that is 8.75 in deep with a 8.22 in flange and weighs 58 lb/ft (86 kg/m). Its metric designation is W200x86. All values below come from the AISC Shapes Database v16.0.
W8x58 Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 58 lb/ft | 86 kg/m |
| Cross-sectional area | A | 17.1 in² | 11,000 mm² |
| Depth | d | 8.75 in | 222 mm |
| Flange width | bf | 8.22 in | 209 mm |
| Web thickness | tw | 0.51 in | 13 mm |
| Flange thickness | tf | 0.81 in | 20.6 mm |
| Distance to web toe of fillet (design) | kdes | 1.2 in | 30.5 mm |
| Distance to web toe of fillet (detailing) | kdet | 1.5 in | 38.1 mm |
| Web center line to flange toe of fillet | k1 | 0.875 in | 22.2 mm |
| Distance between web toes of fillets | T | 5.75 in | 146 mm |
| Workable gage (inner holes) | WGi | 5.5 in | 140 mm |
W8x58 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 228 in⁴ | 94.9 ×10⁶ mm⁴ |
| Elastic section modulus, x-axis | Sx | 52 in³ | 852 ×10³ mm³ |
| Plastic section modulus, x-axis | Zx | 59.8 in³ | 980 ×10³ mm³ |
| Radius of gyration, x-axis | rx | 3.65 in | 92.7 mm |
| Moment of inertia, y-axis | Iy | 75.1 in⁴ | 31.3 ×10⁶ mm⁴ |
| Elastic section modulus, y-axis | Sy | 18.3 in³ | 300 ×10³ mm³ |
| Plastic section modulus, y-axis | Zy | 27.9 in³ | 457 ×10³ mm³ |
| Radius of gyration, y-axis | ry | 2.1 in | 53.3 mm |
| Torsional constant | J | 3.33 in⁴ | 1,390 ×10³ mm⁴ |
| Warping constant | Cw | 1,180 in⁶ | 317 ×10⁹ mm⁶ |
| Effective radius of gyration | rts | 2.39 in | 60.7 mm |
| Distance between flange centroids | ho | 7.94 in | 202 mm |
| Flange slenderness | bf/2tf | 5.07 | 5.07 |
| Web slenderness | h/tw | 12.4 | 12.4 |
W8x58 Weight Calculator
Enter a length to get the total weight of a W8x58 beam. A 20 ft length weighs 1,160 lb.
Uses the AISC nominal weight: 58 lb/ft (86 kg/m).
Beams Similar to W8x58
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) |
|---|---|---|---|
| W8x67 | 67 | 9 | 8.28 |
| W8x48 | 48 | 8.5 | 8.11 |
| W8x40 | 40 | 8.25 | 8.07 |
See every W8 size in the W8 beam sizes chart, or compare all shapes in the wide flange beam sizes chart.
W8x58 FAQ
What does W8x58 mean?
W means wide flange. The first number (8) is the nominal depth in inches, and the second number (58) is the weight in pounds per foot. The actual depth of W8x58 is 8.75 in. How to read steel beam sizes.
How much does a W8x58 beam weigh?
W8x58 weighs 58 lb per foot (86 kg per meter). A 20 ft beam weighs about 1,160 lb. Use the calculator above for any length.
What is the metric equivalent of W8x58?
The metric (SI) designation is W200x86: 222 mm deep with a 209 mm flange and 86 kg/m.
How far can a W8x58 beam span?
Span depends on the load, support conditions, deflection limits and local building code, so it cannot be read from a size table. A licensed structural engineer must size any beam that carries a load.
Source: AISC Shapes Database v16.0, consistent with the AISC Steel Construction Manual, 16th Edition. Last updated: September 2026.
This page is reference information only and is not engineering advice. Do not use it for a specific design without verification by a licensed engineer or architect. Full disclaimer.