ST12X40 Dimensions & Weight

ST12X40 is an AISC structural tee with a nominal depth of 12 in, weighing 40 lb per foot — commonly used for truss chords, hangers, and lintels. It is the lightest of the 5 ST12 sizes listed here.

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ST12X40 Dimensions

Property	Imperial	Metric
Nominal depthfrom the designation	12 in	304.8 mm
Cross-section area (A)computed from weight and steel density	11.76 in²	75.9 cm²
Weight	40 lb/ft	59.5 kg/m

Standard: AISC. Values from the published section tables; dimensions not listed here are not shown rather than estimated.

What does ST12X40 weigh and cost?

ST12X40 weighs 40 lb per foot. At an example material price of $0.92/lb that is about $36.80 per foot. Set your quantity, length, and price to total your own run:

QtyLength (ft)$ / lb

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Total weight

800 lbs

Material cost

$736.00

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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