U 120x45x3.2 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 120x45x3.2 (UK / Australia)

The U 120x45x3.2 steel profile weighs 5.0 kg/m (3.37 lb/ft), has a depth of 120 mm (4.72 in), flange width 45 mm (1.77 in). Cross-sectional area: 638.315 mm². Moment of inertia Ix = 132.619 cm⁴, Iy = 11.759 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	120 mm	4.72 in
Width (b)	45 mm	1.77 in
Thickness (t)	3.2 mm	0.13 in
Weight	5.0 kg/m	3.37 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	638.32 mm²	0.989 in²
Moment of inertia (Ix)	132.62 cm⁴	3.19 in⁴
Moment of inertia (Iy)	11.76 cm⁴	0.28 in⁴
Elastic section modulus (Sx)	22.1 cm³	1.349 in³
Elastic section modulus (Sy)	3.46 cm³	0.211 in³
Plastic section modulus (Zx)	27.13 cm³	1.656 in³
Plastic section modulus (Zy)	4.56 cm³	0.278 in³
Radius of gyration (rx)	4.56 cm	1.795 in
Radius of gyration (ry)	1.36 cm	0.534 in