U 80x40x4.75 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 80x40x4.75 (UK / Australia)

The U 80x40x4.75 steel profile weighs 5.4 kg/m (3.62 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 685.781 mm². Moment of inertia Ix = 63.152 cm⁴, Iy = 10.268 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)	4.8 mm	0.19 in
Weight	5.4 kg/m	3.62 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	685.78 mm²	1.063 in²
Moment of inertia (Ix)	63.15 cm⁴	1.52 in⁴
Moment of inertia (Iy)	10.27 cm⁴	0.25 in⁴
Elastic section modulus (Sx)	15.79 cm³	0.963 in³
Elastic section modulus (Sy)	3.7 cm³	0.226 in³
Plastic section modulus (Zx)	20.17 cm³	1.231 in³
Plastic section modulus (Zy)	4.97 cm³	0.303 in³
Radius of gyration (rx)	3.03 cm	1.195 in
Radius of gyration (ry)	1.22 cm	0.482 in