400x400 SHS — Sizes, Dimensions & Properties
6 sizes in the 400x400 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) |
|---|---|---|---|---|---|---|---|---|
| 400x400x8.0 | 97.9 | 400 | 8 | 125 | 31,857 | 1,593 | 1,830 | 16 |
| 400x400x10.0 | 122 | 400 | 10 | 155 | 39,128 | 1,956 | 2,260 | 15.9 |
| 400x400x12.0 | 145 | 400 | 12 | 185 | 46,130 | 2,306 | 2,679 | 15.8 |
| 400x400x12.5 | 151 | 400 | 12.5 | 192 | 47,839 | 2,392 | 2,782 | 15.8 |
| 400x400x16.0 | 191 | 400 | 16 | 243 | 59,344 | 2,967 | 3,484 | 15.6 |
| 400x400x20.0 | 235 | 400 | 20 | 300 | 71,535 | 3,577 | 4,247 | 15.4 |
400x400x8.0 SHS
- Designation
- 400x400x8.0
- Outside Dimension (D)
- 400 mm
- Wall Thickness (t)
- 8 mm
- Mass per Metre
- 97.9 kg/m
- Cross-Sectional Area
- 125 cm2
- Second Moment of Area I
- 31,857 cm4
- Elastic Modulus Z
- 1,593 cm3
- Plastic Modulus S
- 1,830 cm3
- Radius of Gyration r
- 16 cm
- Torsional Constant (It)
- 48,695 cm4
- Surface Area per Metre
- 1.58 m2/m
- Surface Area per Tonne
- 16.1 m2/t
400x400x10.0 SHS
- Designation
- 400x400x10.0
- Outside Dimension (D)
- 400 mm
- Wall Thickness (t)
- 10 mm
- Mass per Metre
- 122 kg/m
- Cross-Sectional Area
- 155 cm2
- Second Moment of Area I
- 39,128 cm4
- Elastic Modulus Z
- 1,956 cm3
- Plastic Modulus S
- 2,260 cm3
- Radius of Gyration r
- 15.9 cm
- Torsional Constant (It)
- 60,092 cm4
- Surface Area per Metre
- 1.57 m2/m
- Surface Area per Tonne
- 12.9 m2/t
400x400x12.0 SHS
- Designation
- 400x400x12.0
- Outside Dimension (D)
- 400 mm
- Wall Thickness (t)
- 12 mm
- Mass per Metre
- 145 kg/m
- Cross-Sectional Area
- 185 cm2
- Second Moment of Area I
- 46,130 cm4
- Elastic Modulus Z
- 2,306 cm3
- Plastic Modulus S
- 2,679 cm3
- Radius of Gyration r
- 15.8 cm
- Torsional Constant (It)
- 71,181 cm4
- Surface Area per Metre
- 1.57 m2/m
- Surface Area per Tonne
- 10.8 m2/t
400x400x12.5 SHS
- Designation
- 400x400x12.5
- Outside Dimension (D)
- 400 mm
- Wall Thickness (t)
- 12.5 mm
- Mass per Metre
- 151 kg/m
- Cross-Sectional Area
- 192 cm2
- Second Moment of Area I
- 47,839 cm4
- Elastic Modulus Z
- 2,392 cm3
- Plastic Modulus S
- 2,782 cm3
- Radius of Gyration r
- 15.8 cm
- Torsional Constant (It)
- 73,906 cm4
- Surface Area per Metre
- 1.57 m2/m
- Surface Area per Tonne
- 10.4 m2/t
400x400x16.0 SHS
- Designation
- 400x400x16.0
- Outside Dimension (D)
- 400 mm
- Wall Thickness (t)
- 16 mm
- Mass per Metre
- 191 kg/m
- Cross-Sectional Area
- 243 cm2
- Second Moment of Area I
- 59,344 cm4
- Elastic Modulus Z
- 2,967 cm3
- Plastic Modulus S
- 3,484 cm3
- Radius of Gyration r
- 15.6 cm
- Torsional Constant (It)
- 92,442 cm4
- Surface Area per Metre
- 1.56 m2/m
- Surface Area per Tonne
- 8.2 m2/t
400x400x20.0 SHS
- Designation
- 400x400x20.0
- Outside Dimension (D)
- 400 mm
- Wall Thickness (t)
- 20 mm
- Mass per Metre
- 235 kg/m
- Cross-Sectional Area
- 300 cm2
- Second Moment of Area I
- 71,535 cm4
- Elastic Modulus Z
- 3,577 cm3
- Plastic Modulus S
- 4,247 cm3
- Radius of Gyration r
- 15.4 cm
- Torsional Constant (It)
- 112,489 cm4
- Surface Area per Metre
- 1.55 m2/m
- Surface Area per Tonne
- 6.6 m2/t
400x400 SHS — Overview
The 400x400 serial size group contains 6 sections, ranging from 235 kg/m to 97.9 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.