W21X57 Dimensions & Weight

W21X57 is an AISC wide-flange (W) shape with an actual depth of 21.06 in and a 6.56 in wide flange, weighing 57 lb per foot — a size you will see on longer floor spans and transfer framing.

W21X57 Dimensions

Property	Imperial	Metric
Depth (d)	21.06 in	534.9 mm
Flange width (bf)	6.56 in	166.5 mm
Cross-section area (A)	16.7 in²	107.7 cm²
Weight	57 lb/ft	84.8 kg/m

What does W21X57 cost?

At an example material price of $0.92/lb, W21X57 runs about $52.44 per foot, or roughly $1,049 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 W21X57s 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
W21X5555 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