StructureCalcs75 x 25 x 1.6 RHS
Rectangular Hollow Section · AS/NZS 1163 · Australia / New Zealand
75 x 25 x 1.6 RHS is a rectangular hollow section 75 × 25 mm with a 1.6 mm wall, weighing 2.4 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 | 75 mm | 2.95 in |
| Overall width, b | 25 mm | 0.98 in |
| Wall thickness, t | 1.6 mm | 0.063 in |
| Mass per metre | 2.4 kg/m | 1.6 lb/ft |
| Area, A | 303 mm² | 0.47 in² |
| Second moment, Ix | 197,353 mm⁴ | 0.5 in⁴ |
| Second moment, Iy | 34,688 mm⁴ | 0.1 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 75 x 25 x 1.6 RHS the computed area agrees with the published value to 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 | 5,263 mm³ |
| Elastic modulus, Zy | 2,775 mm³ |
| Plastic modulus, Sx | 6,815 mm³ |
| Plastic modulus, Sy | 3,108 mm³ |
| Radius of gyration, rx | 25.5 mm |
| Radius of gyration, ry | 10.7 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