StructureCalcsST6X20.4
Structural Tee (from S) · AISC Shapes Database v15.0 · United States
ST6X20.4 is a structural tee cut from an S-shape 152.4 mm deep with a 133.4 mm wide flange, weighing 30.4 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
ST tees are cut from S-shapes and inherit the parent’s tapered flange, which the drawing here reproduces.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 152.4 mm | 6.00 in |
| Flange width, bf | 133.4 mm | 5.25 in |
| Flange thickness, tf | 16.7 mm | 0.659 in |
| Web thickness, tw | 11.7 mm | 0.462 in |
| Mass per metre | 30.4 kg/m | 20.4 lb/ft |
| Area, A | 3,845 mm² | 5.96 in² |
| Second moment, Ix | 7,866,774 mm⁴ | 18.9 in⁴ |
| Second moment, Iy | 2,805,400 mm⁴ | 6.7 in⁴ |
Derived section properties
Integrated from a square-cornered outline — the fillet radii this family really has are not drawn, so the computed values differ slightly from published. For ST6X20.4 the computed area is 0.56% from published and Ix 0.05%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 70,088 mm³ |
| Elastic modulus, Sy | 43,090 mm³ |
| Plastic modulus, Zx | 126,278 mm³ |
| Plastic modulus, Zy | 72,839 mm³ |
| Radius of gyration, rx | 45.3 mm |
| Radius of gyration, ry | 27.4 mm |
S is the elastic modulus and Z the plastic modulus, following AISC 360. Australian and British practice reverse the letters.
Neighbouring sizes
Where these numbers come from
Published AISC Shapes Database v15.0 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API