W18X311 Dimensions & Weight
W18X311 is an AISC wide-flange (W) shape with an actual depth of 22.32 in and a 12.01 in wide flange, weighing 311 lb per foot — a size you will see on longer floor spans and transfer framing. It is the heaviest of the 23 W18 sizes listed here.
Count every W18X311 on your drawing — upload a PDF, get the member list. 3 free takeoffs, no card.
Count every W18X311 on your drawing. Count W18X311 on your drawing. 3 free takeoffs, no card.
Start a free takeoffW18X311 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 22.32 in | 566.9 mm |
| Flange width (bf) | 12.01 in | 304.9 mm |
| Cross-section area (A) | 91.4 in² | 589.7 cm² |
| Weight | 311 lb/ft | 462.8 kg/m |
Standard: AISC. Values from the published section tables; dimensions not listed here are not shown rather than estimated.
What does W18X311 weigh and cost?
W18X311 weighs 311 lb per foot. At an example material price of $0.92/lb that is about $286.12 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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Deeper reading: Wide-Flange Beam Sizes: The Complete Guide · How to calculate steel weight