U 80x40x3.2 IAS · Weight & Dimensions

IAS, cold-formed sections · Cold-formed Channel

Cold-formed channels (U shapes) are similar to C shapes but without stiffening lips. Used for light structural framing, supports, and secondary members.

Also known as: U 80x40x3.2 (UK / Australia)

The U 80x40x3.2 steel profile weighs 3.8 kg/m (2.52 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 478.315 mm². Moment of inertia Ix = 46.31 cm⁴, Iy = 7.424 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	40 mm	1.57 in
Thickness (t)	3.2 mm	0.13 in
Weight	3.8 kg/m	2.52 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	478.32 mm²	0.741 in²
Moment of inertia (Ix)	46.31 cm⁴	1.11 in⁴
Moment of inertia (Iy)	7.42 cm⁴	0.18 in⁴
Elastic section modulus (Sx)	11.58 cm³	0.707 in³
Elastic section modulus (Sy)	2.6 cm³	0.159 in³
Plastic section modulus (Zx)	14.16 cm³	0.864 in³
Plastic section modulus (Zy)	3.45 cm³	0.211 in³
Radius of gyration (rx)	3.11 cm	1.225 in
Radius of gyration (ry)	1.25 cm	0.490 in