StructureCalcs165.1 x 3.5 CHS
Circular Hollow Section · AS/NZS 1163 · Australia / New Zealand
165.1 x 3.5 CHS is a circular hollow section 165.1 mm in outside diameter with a 3.5 mm wall, weighing 14.0 kg/m. The dimensions below are the published AS/NZS 1163 values; the drawing is generated from them.
Circular Hollow Sections are cold-formed tubes to AS/NZS 1163 — efficient in compression and torsion, with identical stiffness about every axis.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Outside diameter, d | 165.1 mm | 6.50 in |
| Wall thickness, t | 3.5 mm | 0.138 in |
| Mass per metre | 14.0 kg/m | 9.4 lb/ft |
| Area, A | 1,777 mm² | 2.75 in² |
| Second moment, Ix | 5,803,042 mm⁴ | 13.9 in⁴ |
| Second moment, Iy | 5,803,042 mm⁴ | 13.9 in⁴ |
Derived section properties
Integrated analytically from the exact circular tube. For 165.1 x 3.5 CHS 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 | 70,297 mm³ |
| Elastic modulus, Zy | 70,297 mm³ |
| Plastic modulus, Sx | 91,415 mm³ |
| Plastic modulus, Sy | 91,415 mm³ |
| Radius of gyration, rx | 57.1 mm |
| Radius of gyration, ry | 57.1 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