W21X55 Dimensions & Weight

W21X55 is an AISC wide-flange (W) shape with a cross-section area of 16.16 in², weighing 55 lb per foot — a size that shows up in general building framing.

W21X55 Dimensions

Property	Imperial	Metric
Cross-section area (A)computed from weight and steel density	16.16 in²	104.3 cm²
Weight	55 lb/ft	81.8 kg/m

What does W21X55 cost?

At an example material price of $0.92/lb, W21X55 runs about $50.60 per foot, or roughly $1,012 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 W21X55s off a drawing set by hand? SteelFlo finds every steel label on your PDF automatically — 3 takeoffs free.

Related sizes

W21X4444 lb/ft
W21X4848 lb/ft
W21X5050 lb/ft
W21X5757 lb/ft
W21X6262 lb/ft
W21X6868 lb/ft
W21X7373 lb/ft
W21X8383 lb/ft

Deeper reading: Wide-Flange Beam Sizes: The Complete Guide · How to calculate steel weight