W12X120 Dimensions & Weight
W12X120 is an AISC wide-flange (W) shape with an actual depth of 13.12 in and a 12.32 in wide flange, weighing 120 lb per foot — a workhorse size for floor beams and roof framing on commercial jobs.
W12X120 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 13.12 in | 333.2 mm |
| Flange width (bf) | 12.32 in | 312.9 mm |
| Cross-section area (A) | 35.3 in² | 227.7 cm² |
| Weight | 120 lb/ft | 178.6 kg/m |
What does W12X120 cost?
At an example material price of $0.92/lb, W12X120 runs about $110 per foot, or roughly $2,208 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 W12X120s 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