W18X50 Dimensions & Weight
W18X50 is an AISC wide-flange (W) shape with an actual depth of 17.99 in and a 7.5 in wide flange, weighing 50 lb per foot — a workhorse size for floor beams and roof framing on commercial jobs.
W18X50 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 17.99 in | 456.9 mm |
| Flange width (bf) | 7.5 in | 190.4 mm |
| Cross-section area (A) | 14.7 in² | 94.8 cm² |
| Weight | 50 lb/ft | 74.4 kg/m |
What does W18X50 cost?
At an example material price of $0.92/lb, W18X50 runs about $46.00 per foot, or roughly $920 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 W18X50s off a drawing set by hand? SteelFlo finds every steel label on your PDF automatically — 3 takeoffs free.
Related sizes
Deeper reading: Wide-Flange Beam Sizes: The Complete Guide · How to calculate steel weight