Dimensions, weight per metre and paint area
HM 400x300 is a medium-flange H-section (HM series) weighing 107 kg/m: a 12 m length weighs 1,284.0 kg. It is 390 mm deep and 300 mm wide; the web is 10 mm and the flanges 16 mm thick.
| Depth h | 390 mm |
|---|---|
| Flange width b | 300 mm |
| Web thickness tw | 10 mm |
| Flange thickness tf | 16 mm |
| Weight per metre | 107 kg/m |
|---|---|
| Cross-section area | 136.3 cm² |
| Paint area per metre | 1.980 m²/m |
| Paint area per tonne | 18.6 m²/t |
| 1 m | 107 kg |
|---|---|
| 6 m | 642.0 kg |
| 12 m | 1,284.0 kg |
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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