203x133 UB — Sizes, Dimensions & Properties
2 sizes in the 203x133 serial size group. All dimensions in mm, section properties in cm units.
| Designation | Mass (kg/m) | h (mm) | b (mm) | tw (mm) | tf (mm) | A (cm2) | Ixx (cm4) | Iyy (cm4) | Zxx (cm3) | Sxx (cm3) | rxx (cm) | ryy (cm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 203x133x30 | 30 | 206.8 | 133.9 | 6.4 | 9.6 | 38.2 | 2,900 | 385 | 280 | 314 | 8.71 | 3.17 |
| 203x133x25 | 25.1 | 203.2 | 133.2 | 5.7 | 7.8 | 32 | 2,340 | 308 | 230 | 258 | 8.56 | 3.1 |
203x133x30 UB
- Designation
- 203x133x30
- Serial Size
- 203x133
- Mass per Metre
- 30 kg/m
- Depth of Section (h)
- 206.8 mm
- Width of Section (b)
- 133.9 mm
- Web Thickness (tw)
- 6.4 mm
- Flange Thickness (tf)
- 9.6 mm
- Root Radius (r)
- 7.6 mm
- Depth Between Fillets (d)
- 172.4 mm
- Local Buckling Ratio d/tw
- 26.9
- Local Buckling Ratio cf/tf
- 6.97
- Second Moment of Area Ixx
- 2,900 cm4
- Second Moment of Area Iyy
- 385 cm4
- Elastic Modulus Zxx
- 280 cm3
- Elastic Modulus Zyy
- 57.5 cm3
- Plastic Modulus Sxx
- 314 cm3
- Plastic Modulus Syy
- 88.2 cm3
- Radius of Gyration rxx
- 8.71 cm
- Radius of Gyration ryy
- 3.17 cm
- Cross-Sectional Area
- 38.2 cm2
- Buckling Parameter (u)
- 0.881
- Torsional Index (x)
- 21.5
- Warping Constant (Iw)
- 0.0374 dm6
- Torsional Constant (It)
- 10.3 cm4
- Surface Area per Metre
- 0.923 m2/m
- Surface Area per Tonne
- 30.8 m2/t
203x133x25 UB
- Designation
- 203x133x25
- Serial Size
- 203x133
- Mass per Metre
- 25.1 kg/m
- Depth of Section (h)
- 203.2 mm
- Width of Section (b)
- 133.2 mm
- Web Thickness (tw)
- 5.7 mm
- Flange Thickness (tf)
- 7.8 mm
- Root Radius (r)
- 7.6 mm
- Depth Between Fillets (d)
- 172.4 mm
- Local Buckling Ratio d/tw
- 30.2
- Local Buckling Ratio cf/tf
- 8.54
- Second Moment of Area Ixx
- 2,340 cm4
- Second Moment of Area Iyy
- 308 cm4
- Elastic Modulus Zxx
- 230 cm3
- Elastic Modulus Zyy
- 46.2 cm3
- Plastic Modulus Sxx
- 258 cm3
- Plastic Modulus Syy
- 70.9 cm3
- Radius of Gyration rxx
- 8.56 cm
- Radius of Gyration ryy
- 3.1 cm
- Cross-Sectional Area
- 32 cm2
- Buckling Parameter (u)
- 0.877
- Torsional Index (x)
- 25.6
- Warping Constant (Iw)
- 0.0294 dm6
- Torsional Constant (It)
- 5.96 cm4
- Surface Area per Metre
- 0.915 m2/m
- Surface Area per Tonne
- 36.5 m2/t
203x133 UB — Overview
The 203x133 serial size group contains 2 sections, ranging from 25.1 kg/m to 30 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.