70x70 SHS — Sizes, Dimensions & Properties
8 sizes in the 70x70 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) |
|---|---|---|---|---|---|---|---|---|
| 70x70x3.0 | 6.24 | 70 | 3 | 7.94 | 59 | 16.9 | 19.9 | 2.73 |
| 70x70x3.2 | 6.63 | 70 | 3.2 | 8.44 | 62.3 | 17.8 | 21 | 2.72 |
| 70x70x3.6 | 7.4 | 70 | 3.6 | 9.42 | 68.6 | 19.6 | 23.3 | 2.7 |
| 70x70x4.0 | 8.15 | 70 | 4 | 10.4 | 74.7 | 21.3 | 25.5 | 2.68 |
| 70x70x5.0 | 9.99 | 70 | 5 | 12.7 | 88.5 | 25.3 | 30.8 | 2.64 |
| 70x70x6.0 | 11.8 | 70 | 6 | 15 | 101 | 28.7 | 35.5 | 2.59 |
| 70x70x6.3 | 12.3 | 70 | 6.3 | 15.6 | 104 | 29.7 | 36.9 | 2.58 |
| 70x70x8.0 | 15 | 70 | 8 | 19.2 | 120 | 34.2 | 43.8 | 2.5 |
70x70x3.0 SHS
- Designation
- 70x70x3.0
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 3 mm
- Mass per Metre
- 6.24 kg/m
- Cross-Sectional Area
- 7.94 cm2
- Second Moment of Area I
- 59 cm4
- Elastic Modulus Z
- 16.9 cm3
- Plastic Modulus S
- 19.9 cm3
- Radius of Gyration r
- 2.73 cm
- Torsional Constant (It)
- 92.2 cm4
- Surface Area per Metre
- 0.272 m2/m
- Surface Area per Tonne
- 43.6 m2/t
70x70x3.2 SHS
- Designation
- 70x70x3.2
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 3.2 mm
- Mass per Metre
- 6.63 kg/m
- Cross-Sectional Area
- 8.44 cm2
- Second Moment of Area I
- 62.3 cm4
- Elastic Modulus Z
- 17.8 cm3
- Plastic Modulus S
- 21 cm3
- Radius of Gyration r
- 2.72 cm
- Torsional Constant (It)
- 97.6 cm4
- Surface Area per Metre
- 0.272 m2/m
- Surface Area per Tonne
- 41 m2/t
70x70x3.6 SHS
- Designation
- 70x70x3.6
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 3.6 mm
- Mass per Metre
- 7.4 kg/m
- Cross-Sectional Area
- 9.42 cm2
- Second Moment of Area I
- 68.6 cm4
- Elastic Modulus Z
- 19.6 cm3
- Plastic Modulus S
- 23.3 cm3
- Radius of Gyration r
- 2.7 cm
- Torsional Constant (It)
- 108 cm4
- Surface Area per Metre
- 0.271 m2/m
- Surface Area per Tonne
- 36.6 m2/t
70x70x4.0 SHS
- Designation
- 70x70x4.0
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 4 mm
- Mass per Metre
- 8.15 kg/m
- Cross-Sectional Area
- 10.4 cm2
- Second Moment of Area I
- 74.7 cm4
- Elastic Modulus Z
- 21.3 cm3
- Plastic Modulus S
- 25.5 cm3
- Radius of Gyration r
- 2.68 cm
- Torsional Constant (It)
- 118 cm4
- Surface Area per Metre
- 0.27 m2/m
- Surface Area per Tonne
- 33.1 m2/t
70x70x5.0 SHS
- Designation
- 70x70x5.0
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 5 mm
- Mass per Metre
- 9.99 kg/m
- Cross-Sectional Area
- 12.7 cm2
- Second Moment of Area I
- 88.5 cm4
- Elastic Modulus Z
- 25.3 cm3
- Plastic Modulus S
- 30.8 cm3
- Radius of Gyration r
- 2.64 cm
- Torsional Constant (It)
- 142 cm4
- Surface Area per Metre
- 0.267 m2/m
- Surface Area per Tonne
- 26.7 m2/t
70x70x6.0 SHS
- Designation
- 70x70x6.0
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 6 mm
- Mass per Metre
- 11.8 kg/m
- Cross-Sectional Area
- 15 cm2
- Second Moment of Area I
- 101 cm4
- Elastic Modulus Z
- 28.7 cm3
- Plastic Modulus S
- 35.5 cm3
- Radius of Gyration r
- 2.59 cm
- Torsional Constant (It)
- 163 cm4
- Surface Area per Metre
- 0.265 m2/m
- Surface Area per Tonne
- 22.5 m2/t
70x70x6.3 SHS
- Designation
- 70x70x6.3
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 6.3 mm
- Mass per Metre
- 12.3 kg/m
- Cross-Sectional Area
- 15.6 cm2
- Second Moment of Area I
- 104 cm4
- Elastic Modulus Z
- 29.7 cm3
- Plastic Modulus S
- 36.9 cm3
- Radius of Gyration r
- 2.58 cm
- Torsional Constant (It)
- 169 cm4
- Surface Area per Metre
- 0.264 m2/m
- Surface Area per Tonne
- 21.5 m2/t
70x70x8.0 SHS
- Designation
- 70x70x8.0
- Outside Dimension (D)
- 70 mm
- Wall Thickness (t)
- 8 mm
- Mass per Metre
- 15 kg/m
- Cross-Sectional Area
- 19.2 cm2
- Second Moment of Area I
- 120 cm4
- Elastic Modulus Z
- 34.2 cm3
- Plastic Modulus S
- 43.8 cm3
- Radius of Gyration r
- 2.5 cm
- Torsional Constant (It)
- 200 cm4
- Surface Area per Metre
- 0.259 m2/m
- Surface Area per Tonne
- 17.3 m2/t
70x70 SHS — Overview
The 70x70 serial size group contains 8 sections, ranging from 15 kg/m to 6.24 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.