StructureCalcs20 x 20 x 2.0 SHS
Square Hollow Section · AS/NZS 1163 · Australia / New Zealand
20 x 20 x 2.0 SHS is a square hollow section 20 × 20 mm with a 2.0 mm wall, weighing 1.1 kg/m. The dimensions below are the published AS/NZS 1163 values; the drawing is generated from them.
Square Hollow Sections carry equal stiffness about both geometric axes, which makes them a natural column and truss-chord choice.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Overall depth, d | 20 mm | 0.79 in |
| Overall width, b | 20 mm | 0.79 in |
| Wall thickness, t | 2.0 mm | 0.079 in |
| Mass per metre | 1.1 kg/m | 0.7 lb/ft |
| Area, A | 134 mm² | 0.21 in² |
| Second moment, Ix | 6,922 mm⁴ | 0.0 in⁴ |
| Second moment, Iy | 6,922 mm⁴ | 0.0 in⁴ |
Derived section properties
Integrated from the section's own outline including its outside corner radii, whose arcs are integrated analytically rather than approximated by facets. For 20 x 20 x 2.0 SHS the computed area agrees with the published value to better than 0.01% and Ix to better than 0.01%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 692 mm³ |
| Elastic modulus, Zy | 692 mm³ |
| Plastic modulus, Sx | 877 mm³ |
| Plastic modulus, Sy | 877 mm³ |
| Radius of gyration, rx | 7.2 mm |
| Radius of gyration, ry | 7.2 mm |
Z is the elastic modulus and S the plastic modulus, following AS 4100. Under AISC 360 the letters are reversed.
Neighbouring sizes
Where these numbers come from
Published AS/NZS 1163 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API