W14x120 is a wide flange steel beam that is 14.5 in deep with a 14.7 in flange and weighs 120 lb/ft (179 kg/m). Its metric designation is W360x179. All values below come from the AISC Shapes Database v16.0.
W14x120 Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 120 lb/ft | 179 kg/m |
| Cross-sectional area | A | 35.3 in² | 22,800 mm² |
| Depth | d | 14.5 in | 368 mm |
| Flange width | bf | 14.7 in | 373 mm |
| Web thickness | tw | 0.59 in | 15 mm |
| Flange thickness | tf | 0.94 in | 23.9 mm |
| Distance to web toe of fillet (design) | kdes | 1.54 in | 39.1 mm |
| Distance to web toe of fillet (detailing) | kdet | 2.25 in | 57.2 mm |
| Web center line to flange toe of fillet | k1 | 1.5 in | 38.1 mm |
| Distance between web toes of fillets | T | 10 in | 254 mm |
| Workable gage (inner holes) | WGi | 5.5 in | 140 mm |
W14x120 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 1,380 in⁴ | 574 ×10⁶ mm⁴ |
| Elastic section modulus, x-axis | Sx | 190 in³ | 3,110 ×10³ mm³ |
| Plastic section modulus, x-axis | Zx | 212 in³ | 3,470 ×10³ mm³ |
| Radius of gyration, x-axis | rx | 6.24 in | 158 mm |
| Moment of inertia, y-axis | Iy | 495 in⁴ | 206 ×10⁶ mm⁴ |
| Elastic section modulus, y-axis | Sy | 67.5 in³ | 1,110 ×10³ mm³ |
| Plastic section modulus, y-axis | Zy | 102 in³ | 1,670 ×10³ mm³ |
| Radius of gyration, y-axis | ry | 3.74 in | 95 mm |
| Torsional constant | J | 9.37 in⁴ | 3,900 ×10³ mm⁴ |
| Warping constant | Cw | 22,700 in⁶ | 6,100 ×10⁹ mm⁶ |
| Effective radius of gyration | rts | 4.2 in | 107 mm |
| Distance between flange centroids | ho | 13.6 in | 345 mm |
| Flange slenderness | bf/2tf | 7.8 | 7.8 |
| Web slenderness | h/tw | 19.3 | 19.3 |
W14x120 Weight Calculator
Enter a length to get the total weight of a W14x120 beam. A 20 ft length weighs 2,400 lb.
Uses the AISC nominal weight: 120 lb/ft (179 kg/m).
Beams Similar to W14x120
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) |
|---|---|---|---|
| W14x109 | 109 | 14.3 | 14.6 |
| W14x132 | 132 | 14.7 | 14.7 |
| W14x99 | 99 | 14.2 | 14.6 |
See every W14 size in the W14 beam sizes chart, or compare all shapes in the wide flange beam sizes chart. Working in millimetres? W14x120 is listed as W360x179 in the metric wide flange beam sizes chart.
W14x120 FAQ
What does W14x120 mean?
W means wide flange. The first number (14) is the nominal depth in inches, and the second number (120) is the weight in pounds per foot. The actual depth of W14x120 is 14.5 in. How to read steel beam sizes.
How much does a W14x120 beam weigh?
W14x120 weighs 120 lb per foot (179 kg per meter). A 20 ft beam weighs about 2,400 lb. Use the calculator above for any length.
What is the metric equivalent of W14x120?
The metric (SI) designation is W360x179: 368 mm deep with a 373 mm flange and 179 kg/m.
How far can a W14x120 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.