CS 400x155 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 400x155 (México) · Doble T CS 400x155 (Argentina / LATAM) · UB 400 (UK / Australia)

The CS 400x155 steel profile weighs 154.9 kg/m (104.08 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 19,725 mm². Moment of inertia Ix = 60,148.358 cm⁴, Iy = 20,272.559 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)	12.5 mm	0.49 in
Flange thickness (tf)	19 mm	0.75 in
Weight	154.9 kg/m	104.08 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	19,725 mm²	30.574 in²
Moment of inertia (Ix)	60,148.36 cm⁴	1445.06 in⁴
Moment of inertia (Iy)	20,272.56 cm⁴	487.05 in⁴
Elastic section modulus (Sx)	3,007.42 cm³	183.525 in³
Elastic section modulus (Sy)	1,013.63 cm³	61.856 in³
Plastic section modulus (Zx)	3,305.11 cm³	201.691 in³
Plastic section modulus (Zy)	1,534.14 cm³	93.619 in³
Radius of gyration (rx)	17.46 cm	6.875 in
Radius of gyration (ry)	10.14 cm	3.991 in