U 100x80x4.75 Tecnometal · Weight & Dimensions

Tecnometal, cold-formed sections (Brazil) · 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 100x80x4.75 (UK / Australia)

The U 100x80x4.75 steel profile weighs 9.1 kg/m (6.12 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,160.781 mm². Moment of inertia Ix = 194.675 cm⁴, Iy = 77.454 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.75 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	80 mm	3.15 in
Thickness (t)	4.8 mm	0.19 in
Fillet radius (r)	4.8 mm	0.19 in
Weight	9.1 kg/m	6.12 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,160.78 mm²	1.799 in²
Moment of inertia (Ix)	194.67 cm⁴	4.68 in⁴
Moment of inertia (Iy)	77.45 cm⁴	1.86 in⁴
Elastic section modulus (Sx)	38.93 cm³	2.376 in³
Elastic section modulus (Sy)	14.63 cm³	0.893 in³
Plastic section modulus (Zx)	45.89 cm³	2.801 in³
Plastic section modulus (Zy)	19.5 cm³	1.190 in³
Radius of gyration (rx)	4.1 cm	1.612 in
Radius of gyration (ry)	2.58 cm	1.017 in