Dimensions, weight per metre and paint area
I 250x125x7.5x12.5 is an I-section weighing 38.3 kg/m: a 12 m length weighs 459.6 kg. It is 250 mm deep and 125 mm wide; the web is 7.5 mm and the flanges 12.5 mm thick.
| Depth h | 250 mm |
|---|---|
| Flange width b | 125 mm |
| Web thickness tw | 7.5 mm |
| Flange thickness tf | 12.5 mm |
| Weight per metre | 38.3 kg/m |
|---|---|
| Cross-section area | 48.8 cm² |
| Paint area per metre | 1.000 m²/m |
| Paint area per tonne | 26.2 m²/t |
| 1 m | 38.3 kg |
|---|---|
| 6 m | 229.8 kg |
| 12 m | 459.6 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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