Dimensions, weight per metre and paint area
686x254x125 UB is a universal beam weighing 125 kg/m: a 12 m length weighs 1,500.0 kg. It is 677.9 mm deep and 253 mm wide; the web is 11.7 mm and the flanges 16.2 mm thick.
Also listed as UB686X254X125.
| Depth h | 677.9 mm |
|---|---|
| Flange width b | 253 mm |
| Web thickness tw | 11.7 mm |
| Flange thickness tf | 16.2 mm |
| Weight per metre | 125 kg/m |
|---|---|
| Cross-section area | 159.2 cm² |
| Paint area per metre | 2.368 m²/m |
| Paint area per tonne | 19.0 m²/t |
| 1 m | 125 kg |
|---|---|
| 6 m | 750.0 kg |
| 12 m | 1,500.0 kg |
Dimensions and mass per BS 4-1, from Steel Optimizer's verified section library. Area is worked out from the mass at 7,850 kg/m³. Paint area counts the outside perimeter with square corners and ignores root radii, so it is on the safe side: typically 2–5 % above catalogue surface areas.
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