W18X55 Dimensions & Weight
W18X55 is an AISC wide-flange (W) shape with an actual depth of 18.11 in and a 7.53 in wide flange, weighing 55 lb per foot — a workhorse size for floor beams and roof framing on commercial jobs.
W18X55 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 18.11 in | 460 mm |
| Flange width (bf) | 7.53 in | 191.3 mm |
| Cross-section area (A) | 16.2 in² | 104.5 cm² |
| Weight | 55 lb/ft | 81.8 kg/m |
What does W18X55 weigh and cost?
W18X55 weighs 55 lb per foot. At an example material price of $0.92/lb that is about $50.60 per foot. Set your quantity, length, and price to total your own run:
Material only, example pricing. Actual steel pricing varies by region, grade, quantity, and market conditions — use your own supplier numbers for real bids.
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Related sizes
Deeper reading: Wide-Flange Beam Sizes: The Complete Guide · How to calculate steel weight