U 120x45x2.5 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 120x45x2.5 (UK / Australia)

The U 120x45x2.5 steel profile weighs 4.0 kg/m (2.66 lb/ft), has a depth of 120 mm (4.72 in), flange width 45 mm (1.77 in). Cross-sectional area: 504.441 mm². Moment of inertia Ix = 106.47 cm⁴, Iy = 9.423 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)	2.5 mm	0.10 in
Weight	4.0 kg/m	2.66 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	504.44 mm²	0.782 in²
Moment of inertia (Ix)	106.47 cm⁴	2.56 in⁴
Moment of inertia (Iy)	9.42 cm⁴	0.23 in⁴
Elastic section modulus (Sx)	17.74 cm³	1.083 in³
Elastic section modulus (Sy)	2.75 cm³	0.168 in³
Plastic section modulus (Zx)	21.48 cm³	1.311 in³
Plastic section modulus (Zy)	3.61 cm³	0.220 in³
Radius of gyration (rx)	4.59 cm	1.809 in
Radius of gyration (ry)	1.37 cm	0.538 in