W18X71 Dimensions & Weight

W18X71 is an AISC wide-flange (W) shape with an actual depth of 18.47 in and a 7.64 in wide flange, weighing 71 lb per foot — a workhorse size for floor beams and roof framing on commercial jobs.

W18X71 Dimensions

Property	Imperial	Metric
Depth (d)	18.47 in	469.1 mm
Flange width (bf)	7.64 in	193.9 mm
Cross-section area (A)	20.8 in²	134.2 cm²
Weight	71 lb/ft	105.7 kg/m

What does W18X71 cost?

At an example material price of $0.92/lb, W18X71 runs about $65.32 per foot, or roughly $1,306 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 W18X71s off a drawing set by hand? SteelFlo finds every steel label on your PDF automatically — 3 takeoffs free.

Related sizes

W18X3535 lb/ft
W18X4040 lb/ft
W18X4646 lb/ft
W18X5050 lb/ft
W18X5555 lb/ft
W18X6060 lb/ft
W18X6565 lb/ft
W18X7676 lb/ft

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