U 75x40x3.8 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 75x40x3.8 (UK / Australia)

The U 75x40x3.8 steel profile weighs 4.3 kg/m (2.86 lb/ft), has a depth of 75 mm (2.95 in), flange width 40 mm (1.57 in). Cross-sectional area: 541.5 mm². Moment of inertia Ix = 45.675 cm⁴, Iy = 8.386 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.8 mm ≈ 9 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	75 mm	2.95 in
Width (b)	40 mm	1.57 in
Thickness (t)	3.8 mm	0.15 in
Fillet radius (r)	3.8 mm	0.15 in
Weight	4.3 kg/m	2.86 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	541.5 mm²	0.839 in²
Moment of inertia (Ix)	45.68 cm⁴	1.10 in⁴
Moment of inertia (Iy)	8.39 cm⁴	0.20 in⁴
Elastic section modulus (Sx)	12.18 cm³	0.743 in³
Elastic section modulus (Sy)	3.01 cm³	0.184 in³
Plastic section modulus (Zx)	15.12 cm³	0.923 in³
Plastic section modulus (Zy)	4.02 cm³	0.245 in³
Radius of gyration (rx)	2.9 cm	1.143 in
Radius of gyration (ry)	1.24 cm	0.490 in