Dimensions, weight per metre and paint area
W8x21 is a wide-flange shape weighing 31.3 kg/m (21.0 lb/ft): a 12 m length weighs 375.6 kg. It is 210.3 mm deep and 133.9 mm wide; the web is 6.35 mm and the flanges 10.16 mm thick.
Also listed as W200X31.3.
| Depth h | 210.3 mm |
|---|---|
| Flange width b | 133.9 mm |
| Web thickness tw | 6.35 mm |
| Flange thickness tf | 10.16 mm |
| Weight per metre | 31.3 kg/m |
|---|---|
| Weight per foot | 21.0 lb/ft |
| Cross-section area | 39.9 cm² |
| Paint area per metre | 0.957 m²/m |
| Paint area per tonne | 30.6 m²/t |
| 1 m | 31.3 kg |
|---|---|
| 6 m | 187.8 kg |
| 12 m | 375.6 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 W8x21? 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 W8x21 →