W18X258 Dimensions & Weight

W18X258 is an AISC wide-flange (W) shape with an actual depth of 21.46 in and a 11.77 in wide flange, weighing 258 lb per foot — a size you will see on longer floor spans and transfer framing.

W18X258 Dimensions

Property	Imperial	Metric
Depth (d)	21.46 in	545.1 mm
Flange width (bf)	11.77 in	299 mm
Cross-section area (A)	75.9 in²	489.7 cm²
Weight	258 lb/ft	383.9 kg/m

What does W18X258 cost?

At an example material price of $0.92/lb, W18X258 runs about $237 per foot, or roughly $4,747 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 W18X258s 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
W18X7171 lb/ft

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