Dimensions, weight per metre and paint area
406x178x54 UB is a universal beam weighing 54.1 kg/m: a 12 m length weighs 649.2 kg. It is 402.6 mm deep and 177.7 mm wide; the web is 7.7 mm and the flanges 10.9 mm thick.
Also listed as UB406X178X54.
| Depth h | 402.6 mm |
|---|---|
| Flange width b | 177.7 mm |
| Web thickness tw | 7.7 mm |
| Flange thickness tf | 10.9 mm |
| Weight per metre | 54.1 kg/m |
|---|---|
| Cross-section area | 68.9 cm² |
| Paint area per metre | 1.516 m²/m |
| Paint area per tonne | 28.1 m²/t |
| 1 m | 54.1 kg |
|---|---|
| 6 m | 324.6 kg |
| 12 m | 649.2 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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