305x102 UB — Sizes, Dimensions & Properties
3 sizes in the 305x102 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 305x102x33 | 32.8 | 312.7 | 102.4 | 6.6 | 10.8 | 41.8 | 6,500 | 194 | 416 | 481 | 12.5 | 2.15 |
| 305x102x28 | 28.2 | 308.7 | 101.8 | 6 | 8.8 | 35.9 | 5,370 | 155 | 348 | 403 | 12.2 | 2.08 |
| 305x102x25 | 24.8 | 305.1 | 101.6 | 5.8 | 7 | 31.6 | 4,460 | 123 | 292 | 342 | 11.9 | 1.97 |
305x102x33 UB
- Designation
- 305x102x33
- Serial Size
- 305x102
- Mass per Metre
- 32.8 kg/m
- Depth of Section (h)
- 312.7 mm
- Width of Section (b)
- 102.4 mm
- Web Thickness (tw)
- 6.6 mm
- Flange Thickness (tf)
- 10.8 mm
- Root Radius (r)
- 7.6 mm
- Depth Between Fillets (d)
- 275.9 mm
- Local Buckling Ratio d/tw
- 41.8
- Local Buckling Ratio cf/tf
- 4.74
- Second Moment of Area Ixx
- 6,500 cm4
- Second Moment of Area Iyy
- 194 cm4
- Elastic Modulus Zxx
- 416 cm3
- Elastic Modulus Zyy
- 37.9 cm3
- Plastic Modulus Sxx
- 481 cm3
- Plastic Modulus Syy
- 60 cm3
- Radius of Gyration rxx
- 12.5 cm
- Radius of Gyration ryy
- 2.15 cm
- Cross-Sectional Area
- 41.8 cm2
- Buckling Parameter (u)
- 0.866
- Torsional Index (x)
- 31.6
- Warping Constant (Iw)
- 0.0442 dm6
- Torsional Constant (It)
- 12.2 cm4
- Surface Area per Metre
- 1.01 m2/m
- Surface Area per Tonne
- 30.8 m2/t
305x102x28 UB
- Designation
- 305x102x28
- Serial Size
- 305x102
- Mass per Metre
- 28.2 kg/m
- Depth of Section (h)
- 308.7 mm
- Width of Section (b)
- 101.8 mm
- Web Thickness (tw)
- 6 mm
- Flange Thickness (tf)
- 8.8 mm
- Root Radius (r)
- 7.6 mm
- Depth Between Fillets (d)
- 275.9 mm
- Local Buckling Ratio d/tw
- 46
- Local Buckling Ratio cf/tf
- 5.78
- Second Moment of Area Ixx
- 5,370 cm4
- Second Moment of Area Iyy
- 155 cm4
- Elastic Modulus Zxx
- 348 cm3
- Elastic Modulus Zyy
- 30.5 cm3
- Plastic Modulus Sxx
- 403 cm3
- Plastic Modulus Syy
- 48.4 cm3
- Radius of Gyration rxx
- 12.2 cm
- Radius of Gyration ryy
- 2.08 cm
- Cross-Sectional Area
- 35.9 cm2
- Buckling Parameter (u)
- 0.859
- Torsional Index (x)
- 37.4
- Warping Constant (Iw)
- 0.0349 dm6
- Torsional Constant (It)
- 7.4 cm4
- Surface Area per Metre
- 1 m2/m
- Surface Area per Tonne
- 35.5 m2/t
305x102x25 UB
- Designation
- 305x102x25
- Serial Size
- 305x102
- Mass per Metre
- 24.8 kg/m
- Depth of Section (h)
- 305.1 mm
- Width of Section (b)
- 101.6 mm
- Web Thickness (tw)
- 5.8 mm
- Flange Thickness (tf)
- 7 mm
- Root Radius (r)
- 7.6 mm
- Depth Between Fillets (d)
- 275.9 mm
- Local Buckling Ratio d/tw
- 47.6
- Local Buckling Ratio cf/tf
- 7.26
- Second Moment of Area Ixx
- 4,460 cm4
- Second Moment of Area Iyy
- 123 cm4
- Elastic Modulus Zxx
- 292 cm3
- Elastic Modulus Zyy
- 24.2 cm3
- Plastic Modulus Sxx
- 342 cm3
- Plastic Modulus Syy
- 38.8 cm3
- Radius of Gyration rxx
- 11.9 cm
- Radius of Gyration ryy
- 1.97 cm
- Cross-Sectional Area
- 31.6 cm2
- Buckling Parameter (u)
- 0.846
- Torsional Index (x)
- 43.4
- Warping Constant (Iw)
- 0.0273 dm6
- Torsional Constant (It)
- 4.77 cm4
- Surface Area per Metre
- 0.992 m2/m
- Surface Area per Tonne
- 40 m2/t
305x102 UB — Overview
The 305x102 serial size group contains 3 sections, ranging from 24.8 kg/m to 32.8 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.