W21X48 Dimensions & Weight

W21X48 is an AISC wide-flange (W) shape with an actual depth of 20.57 in and a 8.14 in wide flange, weighing 48 lb per foot — a size you will see on longer floor spans and transfer framing.

W21X48 Dimensions

Property	Imperial	Metric
Depth (d)	20.57 in	522.5 mm
Flange width (bf)	8.14 in	206.8 mm
Cross-section area (A)	14.1 in²	91 cm²
Weight	48 lb/ft	71.4 kg/m

What does W21X48 cost?

At an example material price of $0.92/lb, W21X48 runs about $44.16 per foot, or roughly $883 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 W21X48s off a drawing set by hand? SteelFlo finds every steel label on your PDF automatically — 3 takeoffs free.

Related sizes

W21X4444 lb/ft
W21X5050 lb/ft
W21X5555 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