20x20 SHS — Sizes, Dimensions & Properties
2 sizes in the 20x20 serial size group. All dimensions in mm, section properties in cm units.
| Designation | Mass (kg/m) | D (mm) | t (mm) | A (cm2) | I (cm4) | Z (cm3) | S (cm3) | r (cm) |
|---|---|---|---|---|---|---|---|---|
| 20x20x2.0 | 1.1 | 20 | 2 | 1.4 | 0.739 | 0.739 | 0.93 | 0.727 |
| 20x20x2.5 | 1.32 | 20 | 2.5 | 1.68 | 0.835 | 0.835 | 1.08 | 0.705 |
20x20x2.0 SHS
- Designation
- 20x20x2.0
- Outside Dimension (D)
- 20 mm
- Wall Thickness (t)
- 2 mm
- Mass per Metre
- 1.1 kg/m
- Cross-Sectional Area
- 1.4 cm2
- Second Moment of Area I
- 0.739 cm4
- Elastic Modulus Z
- 0.739 cm3
- Plastic Modulus S
- 0.93 cm3
- Radius of Gyration r
- 0.727 cm
- Torsional Constant (It)
- 1.22 cm4
- Surface Area per Metre
- 0.0748 m2/m
- Surface Area per Tonne
- 68 m2/t
20x20x2.5 SHS
- Designation
- 20x20x2.5
- Outside Dimension (D)
- 20 mm
- Wall Thickness (t)
- 2.5 mm
- Mass per Metre
- 1.32 kg/m
- Cross-Sectional Area
- 1.68 cm2
- Second Moment of Area I
- 0.835 cm4
- Elastic Modulus Z
- 0.835 cm3
- Plastic Modulus S
- 1.08 cm3
- Radius of Gyration r
- 0.705 cm
- Torsional Constant (It)
- 1.41 cm4
- Surface Area per Metre
- 0.0736 m2/m
- Surface Area per Tonne
- 55.8 m2/t
20x20 SHS — Overview
The 20x20 serial size group contains 2 sections, ranging from 1.32 kg/m to 1.1 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.