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.
W18X311 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 |
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.
Pricing more than one size? Build a full member list in the free calculator →
Stop counting W18X311s by hand.
Upload your drawing set and SteelFlo puts a box on every steel label it finds — every W18X311, on every page — ready to review and export as a bill of materials.
Related sizes
Deeper reading: Wide-Flange Beam Sizes: The Complete Guide · How to calculate steel weight