Steel Beam Sizes / AISC / S-Shapes / S20x66
S20x66 Dimensions, Weight and Section Properties
AISC American standard beams · v16.0
S20x66: 20 in depth, 6.26 in flange width, 66 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
S20x66 dimensions
Not to scale. Dimensions shown for reference.
Section properties
Symbols match the steel section finder. Imperial and metric values are shown side by side.
| Property | Imperial | Metric |
|---|---|---|
| Weight | 66.00 lb/ft | 98.20 kg/m |
| Depth, d | 20.00 in | 508.00 mm |
| Flange width, bf | 6.26 in | 159.00 mm |
| tw | 0.505 in | 12.800 mm |
| tf | 0.795 in | 20.200 mm |
| Area | 19.40 in² | 12,500.00 mm² |
| Ix | 1,190.00 in⁴ | 495,000,000 mm⁴ |
| Iy | 27.50 in⁴ | 11,400,000 mm⁴ |
| Sx | 119.00 in³ | 1,950,000 mm³ |
| Sy | 8.78 in³ | 144,000.00 mm³ |
| Zx | 139.00 in³ | 2,280,000 mm³ |
| Zy | 15.40 in³ | 252,000.00 mm³ |
| rx | 7.83 in | 199.00 mm |
| ry | 1.19 in | 30.20 mm |
| J | 3.58 in⁴ | 1,490,000 mm⁴ |
| Cw | 2,530.00 in⁶ | 679,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus S20x66.
Source: AISC Shapes Database v16.0 · Methodology