W12x22 is a wide flange steel beam that is 12.3 in deep with a 4.03 in flange and weighs 22 lb/ft (32.7 kg/m). Its metric designation is W310x32.7. All values below come from the AISC Shapes Database v16.0.
W12x22 Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 22 lb/ft | 32.7 kg/m |
| Cross-sectional area | A | 6.48 in² | 4,180 mm² |
| Depth | d | 12.3 in | 312 mm |
| Flange width | bf | 4.03 in | 102 mm |
| Web thickness | tw | 0.26 in | 6.6 mm |
| Flange thickness | tf | 0.425 in | 10.8 mm |
| Distance to web toe of fillet (design) | kdes | 0.725 in | 18.4 mm |
| Distance to web toe of fillet (detailing) | kdet | 0.9375 in | 23.8 mm |
| Web center line to flange toe of fillet | k1 | 0.625 in | 15.9 mm |
| Distance between web toes of fillets | T | 10.375 in | 264 mm |
| Workable gage (inner holes) | WGi | 2.25 in | 57.2 mm |
W12x22 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 156 in⁴ | 64.9 ×10⁶ mm⁴ |
| Elastic section modulus, x-axis | Sx | 25.4 in³ | 416 ×10³ mm³ |
| Plastic section modulus, x-axis | Zx | 29.3 in³ | 480 ×10³ mm³ |
| Radius of gyration, x-axis | rx | 4.91 in | 125 mm |
| Moment of inertia, y-axis | Iy | 4.66 in⁴ | 1.94 ×10⁶ mm⁴ |
| Elastic section modulus, y-axis | Sy | 2.31 in³ | 37.9 ×10³ mm³ |
| Plastic section modulus, y-axis | Zy | 3.66 in³ | 60 ×10³ mm³ |
| Radius of gyration, y-axis | ry | 0.848 in | 21.5 mm |
| Torsional constant | J | 0.293 in⁴ | 122 ×10³ mm⁴ |
| Warping constant | Cw | 164 in⁶ | 44 ×10⁹ mm⁶ |
| Effective radius of gyration | rts | 1.04 in | 26.4 mm |
| Distance between flange centroids | ho | 11.9 in | 302 mm |
| Flange slenderness | bf/2tf | 4.74 | 4.74 |
| Web slenderness | h/tw | 41.8 | 41.8 |
W12x22 Weight Calculator
Enter a length to get the total weight of a W12x22 beam. A 20 ft length weighs 440 lb.
Uses the AISC nominal weight: 22 lb/ft (32.7 kg/m).
Beams Similar to W12x22
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) |
|---|---|---|---|
| W12x19 | 19 | 12.2 | 4.01 |
| W12x26 | 26 | 12.2 | 6.49 |
| W12x16 | 16 | 12 | 3.99 |
See every W12 size in the W12 beam sizes chart, or compare all shapes in the wide flange beam sizes chart.
W12x22 FAQ
What does W12x22 mean?
W means wide flange. The first number (12) is the nominal depth in inches, and the second number (22) is the weight in pounds per foot. The actual depth of W12x22 is 12.3 in. How to read steel beam sizes.
How much does a W12x22 beam weigh?
W12x22 weighs 22 lb per foot (32.7 kg per meter). A 20 ft beam weighs about 440 lb. Use the calculator above for any length.
What is the metric equivalent of W12x22?
The metric (SI) designation is W310x32.7: 312 mm deep with a 102 mm flange and 32.7 kg/m.
How far can a W12x22 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.