U 400x100x3 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 400x100x3 (UK / Australia)

The U 400x100x3 steel profile weighs 13.9 kg/m (9.34 lb/ft), has a depth of 400 mm (15.75 in), flange width 100 mm (3.94 in). Cross-sectional area: 1,770.394 mm². Moment of inertia Ix = 3,846.913 cm⁴, Iy = 143.34 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	100 mm	3.94 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	3 mm	0.12 in
Weight	13.9 kg/m	9.34 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,770.39 mm²	2.744 in²
Moment of inertia (Ix)	3,846.91 cm⁴	92.42 in⁴
Moment of inertia (Iy)	143.34 cm⁴	3.44 in⁴
Elastic section modulus (Sx)	192.35 cm³	11.738 in³
Elastic section modulus (Sy)	17.47 cm³	1.066 in³
Plastic section modulus (Zx)	235.52 cm³	14.372 in³
Plastic section modulus (Zy)	22.76 cm³	1.389 in³
Radius of gyration (rx)	14.74 cm	5.803 in
Radius of gyration (ry)	2.85 cm	1.120 in