CS 550x290 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 550x290 (México) · Doble T CS 550x290 (Argentina / LATAM) · UB 550 (UK / Australia)

The CS 550x290 steel profile weighs 290.4 kg/m (195.18 lb/ft), has a depth of 550 mm (21.65 in), flange width 550 mm (21.65 in). Cross-sectional area: 37,000 mm². Moment of inertia Ix = 209,427.083 cm⁴, Iy = 69,351.496 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	550 mm	21.65 in
Width (b)	550 mm	21.65 in
Web thickness (tw)	19 mm	0.75 in
Flange thickness (tf)	25 mm	0.98 in
Weight	290.4 kg/m	195.18 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	37,000 mm²	57.350 in²
Moment of inertia (Ix)	209,427.08 cm⁴	5031.49 in⁴
Moment of inertia (Iy)	69,351.5 cm⁴	1666.17 in⁴
Elastic section modulus (Sx)	7,615.53 cm³	464.730 in³
Elastic section modulus (Sy)	2,521.87 cm³	153.895 in³
Plastic section modulus (Zx)	8,406.25 cm³	512.983 in³
Plastic section modulus (Zy)	3,826.38 cm³	233.501 in³
Radius of gyration (rx)	23.79 cm	9.367 in
Radius of gyration (ry)	13.69 cm	5.390 in