Dimensions, weight per metre and paint area
W21x73 is a wide-flange shape weighing 108.6 kg/m (73.0 lb/ft): a 12 m length weighs 1,303.2 kg. It is 538.5 mm deep and 210.8 mm wide; the web is 11.56 mm and the flanges 18.8 mm thick.
Also listed as W530X109.
| Depth h | 538.5 mm |
|---|---|
| Flange width b | 210.8 mm |
| Web thickness tw | 11.56 mm |
| Flange thickness tf | 18.8 mm |
| Weight per metre | 108.6 kg/m |
|---|---|
| Weight per foot | 73.0 lb/ft |
| Cross-section area | 138.3 cm² |
| Paint area per metre | 1.921 m²/m |
| Paint area per tonne | 17.7 m²/t |
| 1 m | 108.6 kg |
|---|---|
| 6 m | 651.6 kg |
| 12 m | 1,303.2 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.
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