305x127 UB — Sizes, Dimensions & Properties
3 sizes in the 305x127 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 305x127x48 | 48.1 | 311 | 125.3 | 9 | 14 | 61.2 | 9,570 | 461 | 616 | 711 | 12.5 | 2.74 |
| 305x127x42 | 41.9 | 307.2 | 124.3 | 8 | 12.1 | 53.4 | 8,200 | 389 | 534 | 614 | 12.4 | 2.7 |
| 305x127x37 | 37 | 304.4 | 123.4 | 7.1 | 10.7 | 47.2 | 7,170 | 336 | 471 | 539 | 12.3 | 2.67 |
305x127x48 UB
- Designation
- 305x127x48
- Serial Size
- 305x127
- Mass per Metre
- 48.1 kg/m
- Depth of Section (h)
- 311 mm
- Width of Section (b)
- 125.3 mm
- Web Thickness (tw)
- 9 mm
- Flange Thickness (tf)
- 14 mm
- Root Radius (r)
- 8.9 mm
- Depth Between Fillets (d)
- 265.2 mm
- Local Buckling Ratio d/tw
- 29.5
- Local Buckling Ratio cf/tf
- 4.48
- Second Moment of Area Ixx
- 9,570 cm4
- Second Moment of Area Iyy
- 461 cm4
- Elastic Modulus Zxx
- 616 cm3
- Elastic Modulus Zyy
- 73.6 cm3
- Plastic Modulus Sxx
- 711 cm3
- Plastic Modulus Syy
- 116 cm3
- Radius of Gyration rxx
- 12.5 cm
- Radius of Gyration ryy
- 2.74 cm
- Cross-Sectional Area
- 61.2 cm2
- Buckling Parameter (u)
- 0.873
- Torsional Index (x)
- 23.3
- Warping Constant (Iw)
- 0.102 dm6
- Torsional Constant (It)
- 31.8 cm4
- Surface Area per Metre
- 1.09 m2/m
- Surface Area per Tonne
- 22.7 m2/t
305x127x42 UB
- Designation
- 305x127x42
- Serial Size
- 305x127
- Mass per Metre
- 41.9 kg/m
- Depth of Section (h)
- 307.2 mm
- Width of Section (b)
- 124.3 mm
- Web Thickness (tw)
- 8 mm
- Flange Thickness (tf)
- 12.1 mm
- Root Radius (r)
- 8.9 mm
- Depth Between Fillets (d)
- 265.2 mm
- Local Buckling Ratio d/tw
- 33.2
- Local Buckling Ratio cf/tf
- 5.14
- Second Moment of Area Ixx
- 8,200 cm4
- Second Moment of Area Iyy
- 389 cm4
- Elastic Modulus Zxx
- 534 cm3
- Elastic Modulus Zyy
- 62.6 cm3
- Plastic Modulus Sxx
- 614 cm3
- Plastic Modulus Syy
- 98.4 cm3
- Radius of Gyration rxx
- 12.4 cm
- Radius of Gyration ryy
- 2.7 cm
- Cross-Sectional Area
- 53.4 cm2
- Buckling Parameter (u)
- 0.872
- Torsional Index (x)
- 26.5
- Warping Constant (Iw)
- 0.0846 dm6
- Torsional Constant (It)
- 21.1 cm4
- Surface Area per Metre
- 1.08 m2/m
- Surface Area per Tonne
- 25.8 m2/t
305x127x37 UB
- Designation
- 305x127x37
- Serial Size
- 305x127
- Mass per Metre
- 37 kg/m
- Depth of Section (h)
- 304.4 mm
- Width of Section (b)
- 123.4 mm
- Web Thickness (tw)
- 7.1 mm
- Flange Thickness (tf)
- 10.7 mm
- Root Radius (r)
- 8.9 mm
- Depth Between Fillets (d)
- 265.2 mm
- Local Buckling Ratio d/tw
- 37.4
- Local Buckling Ratio cf/tf
- 5.77
- Second Moment of Area Ixx
- 7,170 cm4
- Second Moment of Area Iyy
- 336 cm4
- Elastic Modulus Zxx
- 471 cm3
- Elastic Modulus Zyy
- 54.5 cm3
- Plastic Modulus Sxx
- 539 cm3
- Plastic Modulus Syy
- 85.4 cm3
- Radius of Gyration rxx
- 12.3 cm
- Radius of Gyration ryy
- 2.67 cm
- Cross-Sectional Area
- 47.2 cm2
- Buckling Parameter (u)
- 0.872
- Torsional Index (x)
- 29.7
- Warping Constant (Iw)
- 0.0725 dm6
- Torsional Constant (It)
- 14.8 cm4
- Surface Area per Metre
- 1.07 m2/m
- Surface Area per Tonne
- 28.9 m2/t
305x127 UB — Overview
The 305x127 serial size group contains 3 sections, ranging from 37 kg/m to 48.1 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.