U 80x40x5 Cintac · Weight & Dimensions

Cintac, 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 80x40x5 (UK / Australia)

The U 80x40x5 steel profile weighs 5.6 kg/m (3.78 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 717.762 mm². Moment of inertia Ix = 65.55 cm⁴, Iy = 10.684 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)	5 mm	0.20 in
Fillet radius (r)	5 mm	0.20 in
Weight	5.6 kg/m	3.78 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	717.76 mm²	1.113 in²
Moment of inertia (Ix)	65.55 cm⁴	1.57 in⁴
Moment of inertia (Iy)	10.68 cm⁴	0.26 in⁴
Elastic section modulus (Sx)	16.39 cm³	1.000 in³
Elastic section modulus (Sy)	3.86 cm³	0.236 in³
Plastic section modulus (Zx)	21.09 cm³	1.287 in³
Plastic section modulus (Zy)	5.21 cm³	0.318 in³
Radius of gyration (rx)	3.02 cm	1.190 in
Radius of gyration (ry)	1.22 cm	0.480 in