273 CHS — Sizes, Dimensions & Properties
9 sizes in the 273 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) |
|---|---|---|---|---|---|---|---|---|
| 273.0x5.0 | 33 | 273 | 5 | 42.1 | 3,780 | 277 | 359 | 9.48 |
| 273.0x6.0 | 39.5 | 273 | 6 | 50.3 | 4,490 | 329 | 428 | 9.44 |
| 273.0x6.3 | 41.4 | 273 | 6.3 | 52.8 | 4,700 | 344 | 448 | 9.43 |
| 273.0x8.0 | 52.3 | 273 | 8 | 66.6 | 5,850 | 429 | 562 | 9.37 |
| 273.0x10.0 | 64.9 | 273 | 10 | 82.6 | 7,150 | 524 | 692 | 9.31 |
| 273.0x12.0 | 77.2 | 273 | 12 | 98.4 | 8,400 | 615 | 818 | 9.24 |
| 273.0x12.5 | 80.3 | 273 | 12.5 | 102 | 8,700 | 637 | 849 | 9.22 |
| 273.0x14.2 | 90.6 | 273 | 14.2 | 115 | 9,700 | 710 | 952 | 9.16 |
| 273.0x16.0 | 101 | 273 | 16 | 129 | 10,700 | 784 | 1,060 | 9.1 |
273.0x5.0 CHS
- Designation
- 273.0x5.0
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 5 mm
- Mass per Metre
- 33 kg/m
- Cross-Sectional Area
- 42.1 cm2
- Second Moment of Area I
- 3,780 cm4
- Elastic Modulus Z
- 277 cm3
- Plastic Modulus S
- 359 cm3
- Radius of Gyration r
- 9.48 cm
- Torsional Constant (It)
- 7,560 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 26 m2/t
273.0x6.0 CHS
- Designation
- 273.0x6.0
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 6 mm
- Mass per Metre
- 39.5 kg/m
- Cross-Sectional Area
- 50.3 cm2
- Second Moment of Area I
- 4,490 cm4
- Elastic Modulus Z
- 329 cm3
- Plastic Modulus S
- 428 cm3
- Radius of Gyration r
- 9.44 cm
- Torsional Constant (It)
- 8,970 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 21.7 m2/t
273.0x6.3 CHS
- Designation
- 273.0x6.3
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 6.3 mm
- Mass per Metre
- 41.4 kg/m
- Cross-Sectional Area
- 52.8 cm2
- Second Moment of Area I
- 4,700 cm4
- Elastic Modulus Z
- 344 cm3
- Plastic Modulus S
- 448 cm3
- Radius of Gyration r
- 9.43 cm
- Torsional Constant (It)
- 9,390 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 20.7 m2/t
273.0x8.0 CHS
- Designation
- 273.0x8.0
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 8 mm
- Mass per Metre
- 52.3 kg/m
- Cross-Sectional Area
- 66.6 cm2
- Second Moment of Area I
- 5,850 cm4
- Elastic Modulus Z
- 429 cm3
- Plastic Modulus S
- 562 cm3
- Radius of Gyration r
- 9.37 cm
- Torsional Constant (It)
- 11,700 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 16.4 m2/t
273.0x10.0 CHS
- Designation
- 273.0x10.0
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 10 mm
- Mass per Metre
- 64.9 kg/m
- Cross-Sectional Area
- 82.6 cm2
- Second Moment of Area I
- 7,150 cm4
- Elastic Modulus Z
- 524 cm3
- Plastic Modulus S
- 692 cm3
- Radius of Gyration r
- 9.31 cm
- Torsional Constant (It)
- 14,300 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 13.2 m2/t
273.0x12.0 CHS
- Designation
- 273.0x12.0
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 12 mm
- Mass per Metre
- 77.2 kg/m
- Cross-Sectional Area
- 98.4 cm2
- Second Moment of Area I
- 8,400 cm4
- Elastic Modulus Z
- 615 cm3
- Plastic Modulus S
- 818 cm3
- Radius of Gyration r
- 9.24 cm
- Torsional Constant (It)
- 16,800 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 11.1 m2/t
273.0x12.5 CHS
- Designation
- 273.0x12.5
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 12.5 mm
- Mass per Metre
- 80.3 kg/m
- Cross-Sectional Area
- 102 cm2
- Second Moment of Area I
- 8,700 cm4
- Elastic Modulus Z
- 637 cm3
- Plastic Modulus S
- 849 cm3
- Radius of Gyration r
- 9.22 cm
- Torsional Constant (It)
- 17,400 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 10.7 m2/t
273.0x14.2 CHS
- Designation
- 273.0x14.2
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 14.2 mm
- Mass per Metre
- 90.6 kg/m
- Cross-Sectional Area
- 115 cm2
- Second Moment of Area I
- 9,700 cm4
- Elastic Modulus Z
- 710 cm3
- Plastic Modulus S
- 952 cm3
- Radius of Gyration r
- 9.16 cm
- Torsional Constant (It)
- 19,400 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 9.46 m2/t
273.0x16.0 CHS
- Designation
- 273.0x16.0
- Outside Diameter (D)
- 273 mm
- Wall Thickness (t)
- 16 mm
- Mass per Metre
- 101 kg/m
- Cross-Sectional Area
- 129 cm2
- Second Moment of Area I
- 10,700 cm4
- Elastic Modulus Z
- 784 cm3
- Plastic Modulus S
- 1,060 cm3
- Radius of Gyration r
- 9.1 cm
- Torsional Constant (It)
- 21,400 cm4
- Surface Area per Metre
- 0.858 m2/m
- Surface Area per Tonne
- 8.46 m2/t
273 CHS — Overview
The 273 serial size group contains 9 sections, ranging from 101 kg/m to 33 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.