U 80x40x3 Cimagbo · Weight & Dimensions

Cimagbo, 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 (UK / Australia)

The U 80x40x3 steel profile weighs 3.5 kg/m (2.38 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 450.394 mm². Moment of inertia Ix = 43.883 cm⁴, Iy = 7.022 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 mm	0.12 in
Fillet radius (r)	3 mm	0.12 in
Weight	3.5 kg/m	2.38 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	450.39 mm²	0.698 in²
Moment of inertia (Ix)	43.88 cm⁴	1.05 in⁴
Moment of inertia (Iy)	7.02 cm⁴	0.17 in⁴
Elastic section modulus (Sx)	10.97 cm³	0.669 in³
Elastic section modulus (Sy)	2.45 cm³	0.150 in³
Plastic section modulus (Zx)	13.34 cm³	0.814 in³
Plastic section modulus (Zy)	3.25 cm³	0.198 in³
Radius of gyration (rx)	3.12 cm	1.229 in
Radius of gyration (ry)	1.25 cm	0.492 in