Dimensions, weight per metre and paint area
HM 450x300 is a medium-flange H-section (HM series) weighing 124 kg/m: a 12 m length weighs 1,488.0 kg. It is 440 mm deep and 300 mm wide; the web is 11 mm and the flanges 18 mm thick.
| Depth h | 440 mm |
|---|---|
| Flange width b | 300 mm |
| Web thickness tw | 11 mm |
| Flange thickness tf | 18 mm |
| Weight per metre | 124 kg/m |
|---|---|
| Cross-section area | 158.0 cm² |
| Paint area per metre | 2.080 m²/m |
| Paint area per tonne | 16.8 m²/t |
| 1 m | 124 kg |
|---|---|
| 6 m | 744.0 kg |
| 12 m | 1,488.0 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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