30x20 UA — Sizes, Dimensions & Properties
2 sizes in the 30x20 serial size group. All dimensions in mm, section properties in cm units.
| Designation | Mass (kg/m) | A (mm) | B (mm) | t (mm) | A (cm2) | Ixx (cm4) | Iyy (cm4) |
|---|---|---|---|---|---|---|---|
| 30x20x4 | 1.46 | 30 | 20 | 4 | 1.86 | 1.59 | 0.553 |
| 30x20x3 | 1.12 | 30 | 20 | 3 | 1.43 | 1.25 | 0.437 |
30x20x4 UA
- Designation
- 30x20x4
- Mass per Metre
- 1.46 kg/m
- Leg Length A
- 30 mm
- Leg Length B
- 20 mm
- Thickness (t)
- 4 mm
- Root Radius (r)
- 4 mm
- Toe Radius (r2)
- 2 mm
- Cross-Sectional Area
- 1.86 cm2
- Centroid Distance cx
- 1.03 cm
- Centroid Distance cy
- 0.541 cm
- Second Moment of Area Ixx
- 1.59 cm4
- Second Moment of Area Iyy
- 0.553 cm4
- Radius of Gyration rxx
- 0.925 cm
- Radius of Gyration ryy
- 0.546 cm
- Elastic Modulus Zxx
- 0.73 cm3
- Elastic Modulus Zyy
- 0.36 cm3
- Second Moment of Area Iu
- 1.81 cm4
- Second Moment of Area Iv
- 0.33 cm4
- Radius of Gyration ru
- 0.988 cm
- Radius of Gyration rv
- 0.421 cm
- tan(alpha)
- 0.459
30x20x3 UA
- Designation
- 30x20x3
- Mass per Metre
- 1.12 kg/m
- Leg Length A
- 30 mm
- Leg Length B
- 20 mm
- Thickness (t)
- 3 mm
- Root Radius (r)
- 4 mm
- Toe Radius (r2)
- 2 mm
- Cross-Sectional Area
- 1.43 cm2
- Centroid Distance cx
- 0.99 cm
- Centroid Distance cy
- 0.502 cm
- Second Moment of Area Ixx
- 1.25 cm4
- Second Moment of Area Iyy
- 0.437 cm4
- Radius of Gyration rxx
- 0.935 cm
- Radius of Gyration ryy
- 0.553 cm
- Elastic Modulus Zxx
- 0.57 cm3
- Elastic Modulus Zyy
- 0.28 cm3
- Second Moment of Area Iu
- 1.43 cm4
- Second Moment of Area Iv
- 0.256 cm4
- Radius of Gyration ru
- 1 cm
- Radius of Gyration rv
- 0.424 cm
- tan(alpha)
- 0.461
30x20 UA — Overview
The 30x20 serial size group contains 2 sections, ranging from 1.12 kg/m to 1.46 kg/m. All sections in this group share the same nominal depth and width but differ in web and flange thickness, which affects the weight and structural capacity.
Section properties are sourced from the Tata Steel Blue Book / SCI P363. For structural design to BS EN 1993-1-1 (Eurocode 3), use these properties with the appropriate partial factors from the UK National Annex.
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Section properties from Tata Steel Blue Book / SCI P363 / BS 4-1:2005.