CS 400x209 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 400x209 (México) · Doble T CS 400x209 (Argentina / LATAM) · UB 400 (UK / Australia)

The CS 400x209 steel profile weighs 209.2 kg/m (140.58 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 26,650 mm². Moment of inertia Ix = 77,205.208 cm⁴, Iy = 26,686.672 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)	19 mm	0.75 in
Flange thickness (tf)	25 mm	0.98 in
Weight	209.2 kg/m	140.58 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	26,650 mm²	41.307 in²
Moment of inertia (Ix)	77,205.21 cm⁴	1854.86 in⁴
Moment of inertia (Iy)	26,686.67 cm⁴	641.15 in⁴
Elastic section modulus (Sx)	3,860.26 cm³	235.569 in³
Elastic section modulus (Sy)	1,334.33 cm³	81.426 in³
Plastic section modulus (Zx)	4,331.88 cm³	264.348 in³
Plastic section modulus (Zy)	2,031.59 cm³	123.976 in³
Radius of gyration (rx)	17.02 cm	6.701 in
Radius of gyration (ry)	10.01 cm	3.940 in