U 100x40x4.75 IAS · Weight & Dimensions

IAS, 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 100x40x4.75 (UK / Australia)

The U 100x40x4.75 steel profile weighs 6.1 kg/m (4.12 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 780.781 mm². Moment of inertia Ix = 108.414 cm⁴, Iy = 11.096 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	40 mm	1.57 in
Thickness (t)	4.8 mm	0.19 in
Weight	6.1 kg/m	4.12 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	780.78 mm²	1.210 in²
Moment of inertia (Ix)	108.41 cm⁴	2.60 in⁴
Moment of inertia (Iy)	11.1 cm⁴	0.27 in⁴
Elastic section modulus (Sx)	21.68 cm³	1.323 in³
Elastic section modulus (Sy)	3.83 cm³	0.234 in³
Plastic section modulus (Zx)	27.8 cm³	1.696 in³
Plastic section modulus (Zy)	5.11 cm³	0.312 in³
Radius of gyration (rx)	3.73 cm	1.467 in
Radius of gyration (ry)	1.19 cm	0.469 in