U 75x40x3.42 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 75x40x3.42 (UK / Australia)

The U 75x40x3.42 steel profile weighs 3.9 kg/m (2.59 lb/ft), has a depth of 75 mm (2.95 in), flange width 40 mm (1.57 in). Cross-sectional area: 491.625 mm². Moment of inertia Ix = 42.001 cm⁴, Iy = 7.682 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.42 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	75 mm	2.95 in
Width (b)	40 mm	1.57 in
Thickness (t)	3.4 mm	0.13 in
Fillet radius (r)	3.4 mm	0.13 in
Weight	3.9 kg/m	2.59 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	491.62 mm²	0.762 in²
Moment of inertia (Ix)	42 cm⁴	1.01 in⁴
Moment of inertia (Iy)	7.68 cm⁴	0.18 in⁴
Elastic section modulus (Sx)	11.2 cm³	0.683 in³
Elastic section modulus (Sy)	2.74 cm³	0.167 in³
Plastic section modulus (Zx)	13.75 cm³	0.839 in³
Plastic section modulus (Zy)	3.64 cm³	0.222 in³
Radius of gyration (rx)	2.92 cm	1.151 in
Radius of gyration (ry)	1.25 cm	0.492 in