Mass4.77kg/m
A608mm²
Ix0.35110⁶ mm⁴
Zx6.910³ mm³
Dimensions
| Parameter | Symbol | Value | Unit | Data |
|---|---|---|---|---|
| Leg length 1 | b1 | 75.0 | mm | U |
| Leg length 2 | b2 | 50.0 | mm | U |
| Thickness | t | 5.0 | mm | U |
| Root radius | r1 | 6.0 | mm | U |
Section Properties
| Parameter | Symbol | Value | Unit | Data |
|---|---|---|---|---|
| General | ||||
| Mass per metre | mass | 4.77 | kg/m | C |
| Gross area | A | 608 | mm² | C |
| Centroid x̄ (from left/heel) | xc | 11.8 | mm | C |
| Centroid ȳ (from bottom) | yc | 24.1 | mm | C |
| About x-axis (major) | ||||
| Second moment of area IxAbout centroidal axis parallel to leg b2 | Ix | 0.351 | 10⁶ mm⁴ | C |
| Elastic section modulus Zx (min) | Zx | 6.9 | 10³ mm³ | C |
| Radius of gyration rx | rx | 24.0 | mm | C |
| About y-axis (minor) | ||||
| Second moment of area IyAbout centroidal axis parallel to leg b1 | Iy | 0.127 | 10⁶ mm⁴ | C |
| Elastic section modulus Zy (min) | Zy | 3.3 | 10³ mm³ | C |
| Radius of gyration ry | ry | 14.4 | mm | C |
| Principal axes | ||||
| Major principal second moment I1 | I1 | 0.405 | 10⁶ mm⁴ | C |
| Minor principal second moment I2 | I2 | 0.073 | 10⁶ mm⁴ | C |
| Minimum radius of gyration r2 | r2 | 11.0 | mm | C |
| Principal axis angleAngle between x-axis and major principal axis | alpha | 23.7 | ° | C |
| Torsion & warping | ||||
| Torsion constant JApproximate thin-walled value, fillets neglected | J | 0.005 | 10⁶ mm⁴ | C |
| Surface area | ||||
| External surface areaToe radii neglected | extArea | 0.247 | m²/m | C |
Nominal designation mass 4.75 kg/m; calculated 4.77 kg/m (+0.4%).
Steel Grades
| Grade | Standard | fy MPa | fu MPa | Note | Data |
|---|---|---|---|---|---|
| 300 | AS/NZS 3679.1:2016 | 320 | 440 | Typical grade supplied – confirm availability with supplier | U |
Strengths shown for governing thickness t = 5.0 mm. Density 7850 kg/m³, E = 200 000 MPa.
Source & Verification
- Source publisher
- Pending verification – nominal dimensions entered by the application developer
- Source document
- AS/NZS 3679.1:2016 Structural steel – Hot-rolled bars and sections
- Edition
- 2016
- Publication year
- 2016
- Page reference
- —
- Last updated
- 2026-10-12
- Verification status
- Unverified
Toe radii neglected in calculated properties. Nominal dimensions require verification against AS/NZS 3679.1 and the manufacturer catalogue before design use.