W8X21 Dimensions & Weight
W8X21 is an AISC wide-flange (W) shape with an actual depth of 8.28 in and a 5.27 in wide flange, weighing 21 lb per foot — a shallow section typical for lintels, stub columns, and light residential framing.
W8X21 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 8.28 in | 210.3 mm |
| Flange width (bf) | 5.27 in | 133.9 mm |
| Cross-section area (A) | 6.16 in² | 39.7 cm² |
| Weight | 21 lb/ft | 31.3 kg/m |
What does W8X21 cost?
At an example material price of $0.92/lb, W8X21 runs about $19.32 per foot, or roughly $386 for a 20-ft length.
Example pricing only. Actual steel pricing varies by region, grade, quantity, and market conditions — use your own supplier numbers for real bids.
Counting W8X21s off a drawing set by hand? SteelFlo finds every steel label on your PDF automatically — 3 takeoffs free.
Related sizes
Deeper reading: Wide-Flange Beam Sizes: The Complete Guide · How to calculate steel weight