Dimensions, weight per metre and paint area
W12x87 is a wide-flange shape weighing 129.5 kg/m (87.0 lb/ft): a 12 m length weighs 1,554.0 kg. It is 317.5 mm deep and 307.3 mm wide; the web is 13.08 mm and the flanges 20.57 mm thick.
Also listed as W310X129.
| Depth h | 317.5 mm |
|---|---|
| Flange width b | 307.3 mm |
| Web thickness tw | 13.08 mm |
| Flange thickness tf | 20.57 mm |
| Weight per metre | 129.5 kg/m |
|---|---|
| Weight per foot | 87.0 lb/ft |
| Cross-section area | 165.0 cm² |
| Paint area per metre | 1.865 m²/m |
| Paint area per tonne | 14.4 m²/t |
| 1 m | 129.5 kg |
|---|---|
| 6 m | 777.0 kg |
| 12 m | 1,554.0 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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