U 80 x 8,4 Tecnometal · Weight & Dimensions

Tecnometal, hot-rolled 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 80 x 8,4 (UK / Australia)

The U 80 x 8,4 steel profile weighs 8.4 kg/m (5.63 lb/ft), has a depth of 80 mm (3.15 in), flange width 45 mm (1.77 in). Cross-sectional area: 1,082.92 mm². Moment of inertia Ix = 108.437 cm⁴, Iy = 21.436 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	45 mm	1.77 in
Web thickness (tw)	5 mm	0.20 in
Flange thickness (tf)	8 mm	0.31 in
Fillet radius (r)	10 mm	0.39 in
Weight	8.4 kg/m	5.63 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,082.92 mm²	1.679 in²
Moment of inertia (Ix)	108.44 cm⁴	2.61 in⁴
Moment of inertia (Iy)	21.44 cm⁴	0.51 in⁴
Elastic section modulus (Sx)	27.11 cm³	1.654 in³
Elastic section modulus (Sy)	7.39 cm³	0.451 in³
Plastic section modulus (Zx)	32.32 cm³	1.972 in³
Plastic section modulus (Zy)	13.1 cm³	0.799 in³
Radius of gyration (rx)	3.16 cm	1.246 in
Radius of gyration (ry)	1.41 cm	0.554 in