W18x76 is a wide flange steel beam that is 18.2 in deep with an 11 in flange and weighs 76 lb/ft (113 kg/m). Its metric designation is W460x113. All values below come from the AISC Shapes Database v16.0.
W18x76 Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 76 lb/ft | 113 kg/m |
| Cross-sectional area | A | 22.3 in² | 14,400 mm² |
| Depth | d | 18.2 in | 462 mm |
| Flange width | bf | 11 in | 279 mm |
| Web thickness | tw | 0.425 in | 10.8 mm |
| Flange thickness | tf | 0.68 in | 17.3 mm |
| Distance to web toe of fillet (design) | kdes | 1.08 in | 27.4 mm |
| Distance to web toe of fillet (detailing) | kdet | 1.5625 in | 39.7 mm |
| Web center line to flange toe of fillet | k1 | 1.0625 in | 27 mm |
| Distance between web toes of fillets | T | 15.125 in | 384 mm |
| Workable gage (inner holes) | WGi | 5.5 in | 140 mm |
W18x76 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 1,330 in⁴ | 554 ×10⁶ mm⁴ |
| Elastic section modulus, x-axis | Sx | 146 in³ | 2,390 ×10³ mm³ |
| Plastic section modulus, x-axis | Zx | 163 in³ | 2,670 ×10³ mm³ |
| Radius of gyration, x-axis | rx | 7.73 in | 196 mm |
| Moment of inertia, y-axis | Iy | 152 in⁴ | 63.3 ×10⁶ mm⁴ |
| Elastic section modulus, y-axis | Sy | 27.6 in³ | 452 ×10³ mm³ |
| Plastic section modulus, y-axis | Zy | 42.2 in³ | 692 ×10³ mm³ |
| Radius of gyration, y-axis | ry | 2.61 in | 66.3 mm |
| Torsional constant | J | 2.83 in⁴ | 1,180 ×10³ mm⁴ |
| Warping constant | Cw | 11,700 in⁶ | 3,140 ×10⁹ mm⁶ |
| Effective radius of gyration | rts | 3.02 in | 76.7 mm |
| Distance between flange centroids | ho | 17.5 in | 444 mm |
| Flange slenderness | bf/2tf | 8.11 | 8.11 |
| Web slenderness | h/tw | 37.8 | 37.8 |
W18x76 Weight Calculator
Enter a length to get the total weight of a W18x76 beam. A 20 ft length weighs 1,520 lb.
Uses the AISC nominal weight: 76 lb/ft (113 kg/m).
Beams Similar to W18x76
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) |
|---|---|---|---|
| W18x71 | 71 | 18.5 | 7.64 |
| W18x86 | 86 | 18.4 | 11.1 |
| W18x65 | 65 | 18.4 | 7.59 |
See every W18 size in the W18 beam sizes chart, or compare all shapes in the wide flange beam sizes chart. Working in millimetres? W18x76 is listed as W460x113 in the metric wide flange beam sizes chart.
W18x76 FAQ
What does W18x76 mean?
W means wide flange. The first number (18) is the nominal depth in inches, and the second number (76) is the weight in pounds per foot. The actual depth of W18x76 is 18.2 in. How to read steel beam sizes.
How much does a W18x76 beam weigh?
W18x76 weighs 76 lb per foot (113 kg per meter). A 20 ft beam weighs about 1,520 lb. Use the calculator above for any length.
What is the metric equivalent of W18x76?
The metric (SI) designation is W460x113: 462 mm deep with a 279 mm flange and 113 kg/m.
How far can a W18x76 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.