C3X3.5 Dimensions & Weight

C3X3.5 is an AISC American Standard channel with a nominal depth of 3 in, weighing 3.5 lb per foot — commonly used for stair stringers, lintels, trimmers, and edge framing. It is the lightest of the 4 C3 sizes listed here.

Get the AISC weights table (Excel): C3X3.5 and every other size

Free. Needs a free Steelflo account (also includes 3 free takeoffs, no card).

or start a free takeoff to count C3X3.5 on your drawing.

Weights for every AISC size, in Excel. All AISC sizes in Excel. Free with a Steelflo account.

Get the weights table

C3X3.5 Dimensions

Property	Imperial	Metric
Nominal depthfrom the designation	3 in	76.2 mm
Cross-section area (A)computed from weight and steel density	1.03 in²	6.6 cm²
Weight	3.5 lb/ft	5.2 kg/m

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

What does C3X3.5 weigh and cost?

C3X3.5 weighs 3.5 lb per foot. At an example material price of $0.92/lb that is about $3.22 per foot. Set your quantity, length, and price to total your own run:

QtyLength (ft)$ / lb

Count them on my drawing →

Total weight

70 lbs

Material cost

$64.40

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 →

Tallying by hand?

Free steel takeoff template (Excel) with 4,600+ sections across 6 standards built in

Free. Needs a free Steelflo account (also includes 3 free takeoffs, no card).