StructureCalcs350 x 250 x 12.5 RHS
Rectangular Hollow Section · AS/NZS 1163 · Australia / New Zealand
350 x 250 x 12.5 RHS is a rectangular hollow section 350 × 250 mm with a 12.5 mm wall, weighing 108.6 kg/m. The dimensions below are the published AS/NZS 1163 values; the drawing is generated from them.
Rectangular Hollow Sections combine one strong axis with clean flat faces for connections, and resist torsion far better than open sections of similar mass.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Overall depth, d | 350 mm | 13.78 in |
| Overall width, b | 250 mm | 9.84 in |
| Wall thickness, t | 12.5 mm | 0.492 in |
| Mass per metre | 108.6 kg/m | 73.0 lb/ft |
| Area, A | 13,839 mm² | 21.45 in² |
| Second moment, Ix | 233,449,855 mm⁴ | 560.9 in⁴ |
| Second moment, Iy | 139,072,149 mm⁴ | 334.1 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 350 x 250 x 12.5 RHS 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 | 1,333,999 mm³ |
| Elastic modulus, Zy | 1,112,577 mm³ |
| Plastic modulus, Sx | 1,621,771 mm³ |
| Plastic modulus, Sy | 1,289,221 mm³ |
| Radius of gyration, rx | 129.9 mm |
| Radius of gyration, ry | 100.2 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