Dimensions, weight per metre and paint area
I 400x150x12.5x25 is an I-section weighing 95.8 kg/m: a 12 m length weighs 1,149.6 kg. It is 400 mm deep and 150 mm wide; the web is 12.5 mm and the flanges 25 mm thick.
| Depth h | 400 mm |
|---|---|
| Flange width b | 150 mm |
| Web thickness tw | 12.5 mm |
| Flange thickness tf | 25 mm |
| Weight per metre | 95.8 kg/m |
|---|---|
| Cross-section area | 122.0 cm² |
| Paint area per metre | 1.400 m²/m |
| Paint area per tonne | 14.7 m²/t |
| 1 m | 95.8 kg |
|---|---|
| 6 m | 574.8 kg |
| 12 m | 1,149.6 kg |
Dimensions and mass per JIS G 3192, 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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