CS 400x106 Usiminas · Weight & Dimensions

Usiminas, welded sections · Wide Flange (I-beam)

Wide flange beams (W shapes / I-beams) are the most common structural steel profile used in building construction. They are used for beams, columns, and girders in steel-framed buildings and bridges. Designed per AISC 360, Eurocode 3, and NBR 8800.

Also known as: CS 400x106 (México) · Doble T CS 400x106 (Argentina / LATAM) · UB 400 (UK / Australia)

The CS 400x106 steel profile weighs 106.5 kg/m (71.53 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 13,562.5 mm². Moment of inertia Ix = 41,726.888 cm⁴, Iy = 13,336.013 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	9.5 mm	0.37 in
Flange thickness (tf)	12.5 mm	0.49 in
Weight	106.5 kg/m	71.53 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	13,562.5 mm²	21.022 in²
Moment of inertia (Ix)	41,726.89 cm⁴	1002.49 in⁴
Moment of inertia (Iy)	13,336.01 cm⁴	320.40 in⁴
Elastic section modulus (Sx)	2,086.34 cm³	127.317 in³
Elastic section modulus (Sy)	666.8 cm³	40.691 in³
Plastic section modulus (Zx)	2,271.48 cm³	138.615 in³
Plastic section modulus (Zy)	1,008.46 cm³	61.540 in³
Radius of gyration (rx)	17.54 cm	6.906 in
Radius of gyration (ry)	9.92 cm	3.904 in