W6x15 is a wide flange steel beam that is 5.99 in deep with a 5.99 in flange and weighs 15 lb/ft (22.5 kg/m). Its metric designation is W150x22.5. All values below come from the AISC Shapes Database v16.0.
W6x15 Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 15 lb/ft | 22.5 kg/m |
| Cross-sectional area | A | 4.43 in² | 2,860 mm² |
| Depth | d | 5.99 in | 152 mm |
| Flange width | bf | 5.99 in | 152 mm |
| Web thickness | tw | 0.23 in | 5.84 mm |
| Flange thickness | tf | 0.26 in | 6.6 mm |
| Distance to web toe of fillet (design) | kdes | 0.51 in | 13 mm |
| Distance to web toe of fillet (detailing) | kdet | 0.75 in | 19.1 mm |
| Web center line to flange toe of fillet | k1 | 0.5625 in | 14.3 mm |
| Distance between web toes of fillets | T | 4.5 in | 114 mm |
| Workable gage (inner holes) | WGi | 3.5 in | 88.9 mm |
W6x15 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 29.1 in⁴ | 12.1 ×10⁶ mm⁴ |
| Elastic section modulus, x-axis | Sx | 9.72 in³ | 159 ×10³ mm³ |
| Plastic section modulus, x-axis | Zx | 10.8 in³ | 177 ×10³ mm³ |
| Radius of gyration, x-axis | rx | 2.56 in | 65 mm |
| Moment of inertia, y-axis | Iy | 9.32 in⁴ | 3.88 ×10⁶ mm⁴ |
| Elastic section modulus, y-axis | Sy | 3.11 in³ | 51 ×10³ mm³ |
| Plastic section modulus, y-axis | Zy | 4.75 in³ | 77.8 ×10³ mm³ |
| Radius of gyration, y-axis | ry | 1.45 in | 36.8 mm |
| Torsional constant | J | 0.101 in⁴ | 42 ×10³ mm⁴ |
| Warping constant | Cw | 76.5 in⁶ | 20.5 ×10⁹ mm⁶ |
| Effective radius of gyration | rts | 1.66 in | 42.2 mm |
| Distance between flange centroids | ho | 5.73 in | 146 mm |
| Flange slenderness | bf/2tf | 11.5 | 11.5 |
| Web slenderness | h/tw | 21.6 | 21.6 |
W6x15 Weight Calculator
Enter a length to get the total weight of a W6x15 beam. A 20 ft length weighs 300 lb.
Uses the AISC nominal weight: 15 lb/ft (22.5 kg/m).
Beams Similar to W6x15
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) |
|---|---|---|---|
| W6x16 | 16 | 6.28 | 4.03 |
| W6x12 | 12 | 6.03 | 4 |
| W6x20 | 20 | 6.2 | 6.02 |
See every W6 size in the W6 beam sizes chart, or compare all shapes in the wide flange beam sizes chart. Working in millimetres? W6x15 is listed as W150x22.5 in the metric wide flange beam sizes chart.
W6x15 FAQ
What does W6x15 mean?
W means wide flange. The first number (6) is the nominal depth in inches, and the second number (15) is the weight in pounds per foot. The actual depth of W6x15 is 5.99 in. How to read steel beam sizes.
How much does a W6x15 beam weigh?
W6x15 weighs 15 lb per foot (22.5 kg per meter). A 20 ft beam weighs about 300 lb. Use the calculator above for any length.
What is the metric equivalent of W6x15?
The metric (SI) designation is W150x22.5: 152 mm deep with a 152 mm flange and 22.5 kg/m.
How far can a W6x15 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.