W40X278 Dimensions & Weight
W40X278 is an AISC wide-flange (W) shape with an actual depth of 40.2 in and a 12 in wide flange, weighing 278 lb per foot — a deep section used for girders, transfer beams, and long-span roof framing.
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Count every W40X278 on your drawing. Count W40X278 on your drawing. 3 free takeoffs, no card.
Start a free takeoffW40X278 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 40.2 in | 1,021.1 mm |
| Flange width (bf) | 12 in | 304.8 mm |
| Cross-section area (A) | 81.8 in² | 527.7 cm² |
| Weight | 278 lb/ft | 413.7 kg/m |
Standard: AISC. Values from the published section tables; dimensions not listed here are not shown rather than estimated.
What does W40X278 weigh and cost?
W40X278 weighs 278 lb per foot. At an example material price of $0.92/lb that is about $255.76 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