U 400x100x4 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 400x100x4 (UK / Australia)

The U 400x100x4 steel profile weighs 18.4 kg/m (12.38 lb/ft), has a depth of 400 mm (15.75 in), flange width 100 mm (3.94 in). Cross-sectional area: 2,347.368 mm². Moment of inertia Ix = 5,061.967 cm⁴, Iy = 188.256 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)	4 mm	0.16 in
Fillet radius (r)	4 mm	0.16 in
Weight	18.4 kg/m	12.38 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,347.37 mm²	3.638 in²
Moment of inertia (Ix)	5,061.97 cm⁴	121.61 in⁴
Moment of inertia (Iy)	188.26 cm⁴	4.52 in⁴
Elastic section modulus (Sx)	253.1 cm³	15.445 in³
Elastic section modulus (Sy)	23.06 cm³	1.407 in³
Plastic section modulus (Zx)	312.05 cm³	19.042 in³
Plastic section modulus (Zy)	30.08 cm³	1.836 in³
Radius of gyration (rx)	14.68 cm	5.781 in
Radius of gyration (ry)	2.83 cm	1.115 in