U 100x40x3.04 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 100x40x3.04 (UK / Australia)

The U 100x40x3.04 steel profile weighs 4.1 kg/m (2.73 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 516.8 mm². Moment of inertia Ix = 75.209 cm⁴, Iy = 7.633 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.04 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	40 mm	1.57 in
Thickness (t)	3.0 mm	0.12 in
Fillet radius (r)	3.0 mm	0.12 in
Weight	4.1 kg/m	2.73 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	516.8 mm²	0.801 in²
Moment of inertia (Ix)	75.21 cm⁴	1.81 in⁴
Moment of inertia (Iy)	7.63 cm⁴	0.18 in⁴
Elastic section modulus (Sx)	15.04 cm³	0.918 in³
Elastic section modulus (Sy)	2.57 cm³	0.157 in³
Plastic section modulus (Zx)	18.49 cm³	1.128 in³
Plastic section modulus (Zy)	3.38 cm³	0.206 in³
Radius of gyration (rx)	3.81 cm	1.502 in
Radius of gyration (ry)	1.22 cm	0.478 in