StructureCalcs400 x 400 x 12.5 SHS
Square Hollow Section · AS/NZS 1163 · Australia / New Zealand
400 x 400 x 12.5 SHS is a square hollow section 400 × 400 mm with a 12.5 mm wall, weighing 147.9 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 | 400 mm | 15.75 in |
| Overall width, b | 400 mm | 15.75 in |
| Wall thickness, t | 12.5 mm | 0.492 in |
| Mass per metre | 147.9 kg/m | 99.4 lb/ft |
| Area, A | 18,839 mm² | 29.20 in² |
| Second moment, Ix | 464,268,178 mm⁴ | 1,115.4 in⁴ |
| Second moment, Iy | 464,268,178 mm⁴ | 1,115.4 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 400 x 400 x 12.5 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 | 2,321,341 mm³ |
| Elastic modulus, Zy | 2,321,341 mm³ |
| Plastic modulus, Sx | 2,709,921 mm³ |
| Plastic modulus, Sy | 2,709,921 mm³ |
| Radius of gyration, rx | 157.0 mm |
| Radius of gyration, ry | 157.0 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