StructureCalcs125 x 75 x 4.0 RHS
Rectangular Hollow Section · AS/NZS 1163 · Australia / New Zealand
125 x 75 x 4.0 RHS is a rectangular hollow section 125 × 75 mm with a 4.0 mm wall, weighing 11.6 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 | 125 mm | 4.92 in |
| Overall width, b | 75 mm | 2.95 in |
| Wall thickness, t | 4.0 mm | 0.157 in |
| Mass per metre | 11.6 kg/m | 7.8 lb/ft |
| Area, A | 1,481 mm² | 2.30 in² |
| Second moment, Ix | 3,053,620 mm⁴ | 7.3 in⁴ |
| Second moment, Iy | 1,387,029 mm⁴ | 3.3 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 125 x 75 x 4.0 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 | 48,858 mm³ |
| Elastic modulus, Zy | 36,987 mm³ |
| Plastic modulus, Sx | 60,271 mm³ |
| Plastic modulus, Sy | 42,445 mm³ |
| Radius of gyration, rx | 45.4 mm |
| Radius of gyration, ry | 30.6 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