Dimensions, weight per metre and paint area
C12x20.7 is an American Standard channel weighing 30.8 kg/m (20.7 lb/ft): a 12 m length weighs 369.6 kg. It is 304.8 mm deep and 74.7 mm wide; the web is 7.16 mm and the flanges 12.73 mm thick.
Also listed as C310X30.8.
| Depth h | 304.8 mm |
|---|---|
| Flange width b | 74.7 mm |
| Web thickness tw | 7.16 mm |
| Flange thickness tf | 12.73 mm |
| Weight per metre | 30.8 kg/m |
|---|---|
| Weight per foot | 20.7 lb/ft |
| Cross-section area | 39.2 cm² |
| Paint area per metre | 0.909 m²/m |
| Paint area per tonne | 29.5 m²/t |
| 1 m | 30.8 kg |
|---|---|
| 6 m | 184.8 kg |
| 12 m | 369.6 kg |
Dimensions and mass per AISC Shapes Database v16.0, 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.
Cutting a list of C12x20.7? Steel Optimizer reads your Excel, Tekla or Advance Steel list as it is and gives the cutting plan, the bars to buy and the waste in seconds.
Optimize a cutting list with C12x20.7 →