W8x10 is a wide flange steel beam that is 7.89 in deep with a 3.94 in flange and weighs 10 lb/ft (15 kg/m). Its metric designation is W200x15. All values below come from the AISC Shapes Database v16.0.
W8x10 Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 10 lb/ft | 15 kg/m |
| Cross-sectional area | A | 2.96 in² | 1,910 mm² |
| Depth | d | 7.89 in | 200 mm |
| Flange width | bf | 3.94 in | 100 mm |
| Web thickness | tw | 0.17 in | 4.32 mm |
| Flange thickness | tf | 0.205 in | 5.21 mm |
| Distance to web toe of fillet (design) | kdes | 0.505 in | 12.8 mm |
| Distance to web toe of fillet (detailing) | kdet | 0.6875 in | 17.5 mm |
| Web center line to flange toe of fillet | k1 | 0.5 in | 12.7 mm |
| Distance between web toes of fillets | T | 6.5 in | 165 mm |
| Workable gage (inner holes) | WGi | 2.25 in | 57.2 mm |
W8x10 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 30.8 in⁴ | 12.8 ×10⁶ mm⁴ |
| Elastic section modulus, x-axis | Sx | 7.81 in³ | 128 ×10³ mm³ |
| Plastic section modulus, x-axis | Zx | 8.87 in³ | 145 ×10³ mm³ |
| Radius of gyration, x-axis | rx | 3.22 in | 81.8 mm |
| Moment of inertia, y-axis | Iy | 2.09 in⁴ | 0.87 ×10⁶ mm⁴ |
| Elastic section modulus, y-axis | Sy | 1.06 in³ | 17.4 ×10³ mm³ |
| Plastic section modulus, y-axis | Zy | 1.66 in³ | 27.2 ×10³ mm³ |
| Radius of gyration, y-axis | ry | 0.841 in | 21.4 mm |
| Torsional constant | J | 0.0426 in⁴ | 17.7 ×10³ mm⁴ |
| Warping constant | Cw | 30.9 in⁶ | 8.3 ×10⁹ mm⁶ |
| Effective radius of gyration | rts | 1.01 in | 25.7 mm |
| Distance between flange centroids | ho | 7.69 in | 195 mm |
| Flange slenderness | bf/2tf | 9.61 | 9.61 |
| Web slenderness | h/tw | 40.5 | 40.5 |
W8x10 Weight Calculator
Enter a length to get the total weight of a W8x10 beam. A 20 ft length weighs 200 lb.
Uses the AISC nominal weight: 10 lb/ft (15 kg/m).
Beams Similar to W8x10
See every W8 size in the W8 beam sizes chart, or compare all shapes in the wide flange beam sizes chart. Working in millimetres? W8x10 is listed as W200x15 in the metric wide flange beam sizes chart.
W8x10 FAQ
What does W8x10 mean?
W means wide flange. The first number (8) is the nominal depth in inches, and the second number (10) is the weight in pounds per foot. The actual depth of W8x10 is 7.89 in. How to read steel beam sizes.
How much does a W8x10 beam weigh?
W8x10 weighs 10 lb per foot (15 kg per meter). A 20 ft beam weighs about 200 lb. Use the calculator above for any length.
What is the metric equivalent of W8x10?
The metric (SI) designation is W200x15: 200 mm deep with a 100 mm flange and 15 kg/m.
How far can a W8x10 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.