CS 550x358 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 550x358 (México) · Doble T CS 550x358 (Argentina / LATAM) · UB 550 (UK / Australia)

The CS 550x358 steel profile weighs 357.6 kg/m (240.34 lb/ft), has a depth of 550 mm (21.65 in), flange width 550 mm (21.65 in). Cross-sectional area: 45,558.8 mm². Moment of inertia Ix = 254,731.354 cm⁴, Iy = 87,392.488 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)	22.4 mm	0.88 in
Flange thickness (tf)	31.5 mm	1.24 in
Weight	357.6 kg/m	240.34 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	45,558.8 mm²	70.616 in²
Moment of inertia (Ix)	254,731.35 cm⁴	6119.92 in⁴
Moment of inertia (Iy)	87,392.49 cm⁴	2099.60 in⁴
Elastic section modulus (Sx)	9,262.96 cm³	565.263 in³
Elastic section modulus (Sy)	3,177.91 cm³	193.929 in³
Plastic section modulus (Zx)	10,311.16 cm³	629.228 in³
Plastic section modulus (Zy)	4,825.46 cm³	294.469 in³
Radius of gyration (rx)	23.65 cm	9.309 in
Radius of gyration (ry)	13.85 cm	5.453 in