U 400x75x3 Cintac · Weight & Dimensions

Cintac, cold-formed 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 400x75x3 (UK / Australia)

The U 400x75x3 steel profile weighs 12.7 kg/m (8.55 lb/ft), has a depth of 400 mm (15.75 in), flange width 75 mm (2.95 in). Cross-sectional area: 1,620.394 mm². Moment of inertia Ix = 3,255.868 cm⁴, Iy = 63.275 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	75 mm	2.95 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	3 mm	0.12 in
Weight	12.7 kg/m	8.55 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,620.39 mm²	2.512 in²
Moment of inertia (Ix)	3,255.87 cm⁴	78.22 in⁴
Moment of inertia (Iy)	63.27 cm⁴	1.52 in⁴
Elastic section modulus (Sx)	162.79 cm³	9.934 in³
Elastic section modulus (Sy)	9.97 cm³	0.608 in³
Plastic section modulus (Zx)	205.75 cm³	12.555 in³
Plastic section modulus (Zy)	12.98 cm³	0.792 in³
Radius of gyration (rx)	14.17 cm	5.581 in
Radius of gyration (ry)	1.98 cm	0.778 in