686x254 UB — Sizes, Dimensions & Properties
4 sizes in the 686x254 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 686x254x170 | 170.2 | 692.9 | 255.8 | 14.5 | 23.7 | 217 | 170,000 | 6,630 | 4,920 | 5,630 | 28 | 5.53 |
| 686x254x152 | 152.4 | 687.5 | 254.5 | 13.2 | 21 | 194 | 150,000 | 5,780 | 4,370 | 5,000 | 27.8 | 5.46 |
| 686x254x140 | 140.1 | 683.5 | 253.7 | 12.4 | 19 | 178 | 136,000 | 5,180 | 3,990 | 4,560 | 27.6 | 5.39 |
| 686x254x125 | 125.2 | 677.9 | 253 | 11.7 | 16.2 | 159 | 118,000 | 4,380 | 3,480 | 3,990 | 27.2 | 5.24 |
686x254x170 UB
- Designation
- 686x254x170
- Serial Size
- 686x254
- Mass per Metre
- 170.2 kg/m
- Depth of Section (h)
- 692.9 mm
- Width of Section (b)
- 255.8 mm
- Web Thickness (tw)
- 14.5 mm
- Flange Thickness (tf)
- 23.7 mm
- Root Radius (r)
- 15.2 mm
- Depth Between Fillets (d)
- 615.1 mm
- Local Buckling Ratio d/tw
- 42.4
- Local Buckling Ratio cf/tf
- 5.4
- Second Moment of Area Ixx
- 170,000 cm4
- Second Moment of Area Iyy
- 6,630 cm4
- Elastic Modulus Zxx
- 4,920 cm3
- Elastic Modulus Zyy
- 518 cm3
- Plastic Modulus Sxx
- 5,630 cm3
- Plastic Modulus Syy
- 811 cm3
- Radius of Gyration rxx
- 28 cm
- Radius of Gyration ryy
- 5.53 cm
- Cross-Sectional Area
- 217 cm2
- Buckling Parameter (u)
- 0.872
- Torsional Index (x)
- 31.8
- Warping Constant (Iw)
- 7.42 dm6
- Torsional Constant (It)
- 308 cm4
- Surface Area per Metre
- 2.35 m2/m
- Surface Area per Tonne
- 13.8 m2/t
686x254x152 UB
- Designation
- 686x254x152
- Serial Size
- 686x254
- Mass per Metre
- 152.4 kg/m
- Depth of Section (h)
- 687.5 mm
- Width of Section (b)
- 254.5 mm
- Web Thickness (tw)
- 13.2 mm
- Flange Thickness (tf)
- 21 mm
- Root Radius (r)
- 15.2 mm
- Depth Between Fillets (d)
- 615.1 mm
- Local Buckling Ratio d/tw
- 46.6
- Local Buckling Ratio cf/tf
- 6.06
- Second Moment of Area Ixx
- 150,000 cm4
- Second Moment of Area Iyy
- 5,780 cm4
- Elastic Modulus Zxx
- 4,370 cm3
- Elastic Modulus Zyy
- 455 cm3
- Plastic Modulus Sxx
- 5,000 cm3
- Plastic Modulus Syy
- 710 cm3
- Radius of Gyration rxx
- 27.8 cm
- Radius of Gyration ryy
- 5.46 cm
- Cross-Sectional Area
- 194 cm2
- Buckling Parameter (u)
- 0.871
- Torsional Index (x)
- 35.5
- Warping Constant (Iw)
- 6.42 dm6
- Torsional Constant (It)
- 220 cm4
- Surface Area per Metre
- 2.34 m2/m
- Surface Area per Tonne
- 15.4 m2/t
686x254x140 UB
- Designation
- 686x254x140
- Serial Size
- 686x254
- Mass per Metre
- 140.1 kg/m
- Depth of Section (h)
- 683.5 mm
- Width of Section (b)
- 253.7 mm
- Web Thickness (tw)
- 12.4 mm
- Flange Thickness (tf)
- 19 mm
- Root Radius (r)
- 15.2 mm
- Depth Between Fillets (d)
- 615.1 mm
- Local Buckling Ratio d/tw
- 49.6
- Local Buckling Ratio cf/tf
- 6.68
- Second Moment of Area Ixx
- 136,000 cm4
- Second Moment of Area Iyy
- 5,180 cm4
- Elastic Modulus Zxx
- 3,990 cm3
- Elastic Modulus Zyy
- 409 cm3
- Plastic Modulus Sxx
- 4,560 cm3
- Plastic Modulus Syy
- 638 cm3
- Radius of Gyration rxx
- 27.6 cm
- Radius of Gyration ryy
- 5.39 cm
- Cross-Sectional Area
- 178 cm2
- Buckling Parameter (u)
- 0.868
- Torsional Index (x)
- 38.7
- Warping Constant (Iw)
- 5.72 dm6
- Torsional Constant (It)
- 169 cm4
- Surface Area per Metre
- 2.33 m2/m
- Surface Area per Tonne
- 16.6 m2/t
686x254x125 UB
- Designation
- 686x254x125
- Serial Size
- 686x254
- Mass per Metre
- 125.2 kg/m
- Depth of Section (h)
- 677.9 mm
- Width of Section (b)
- 253 mm
- Web Thickness (tw)
- 11.7 mm
- Flange Thickness (tf)
- 16.2 mm
- Root Radius (r)
- 15.2 mm
- Depth Between Fillets (d)
- 615.1 mm
- Local Buckling Ratio d/tw
- 52.6
- Local Buckling Ratio cf/tf
- 7.81
- Second Moment of Area Ixx
- 118,000 cm4
- Second Moment of Area Iyy
- 4,380 cm4
- Elastic Modulus Zxx
- 3,480 cm3
- Elastic Modulus Zyy
- 346 cm3
- Plastic Modulus Sxx
- 3,990 cm3
- Plastic Modulus Syy
- 542 cm3
- Radius of Gyration rxx
- 27.2 cm
- Radius of Gyration ryy
- 5.24 cm
- Cross-Sectional Area
- 159 cm2
- Buckling Parameter (u)
- 0.862
- Torsional Index (x)
- 43.9
- Warping Constant (Iw)
- 4.8 dm6
- Torsional Constant (It)
- 116 cm4
- Surface Area per Metre
- 2.32 m2/m
- Surface Area per Tonne
- 18.5 m2/t
686x254 UB — Overview
The 686x254 serial size group contains 4 sections, ranging from 125.2 kg/m to 170.2 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.