CS 550x368 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 550x368 (México) · Doble T CS 550x368 (Argentina / LATAM) · UB 550 (UK / Australia)

The CS 550x368 steel profile weighs 367.6 kg/m (247.04 lb/ft), has a depth of 550 mm (21.65 in), flange width 550 mm (21.65 in). Cross-sectional area: 46,825 mm². Moment of inertia Ix = 257,233.883 cm⁴, Iy = 87,410.286 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)	25 mm	0.98 in
Flange thickness (tf)	31.5 mm	1.24 in
Weight	367.6 kg/m	247.04 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	46,825 mm²	72.579 in²
Moment of inertia (Ix)	257,233.88 cm⁴	6180.04 in⁴
Moment of inertia (Iy)	87,410.29 cm⁴	2100.03 in⁴
Elastic section modulus (Sx)	9,353.96 cm³	570.816 in³
Elastic section modulus (Sy)	3,178.56 cm³	193.968 in³
Plastic section modulus (Zx)	10,465.32 cm³	638.636 in³
Plastic section modulus (Zy)	4,840.47 cm³	295.385 in³
Radius of gyration (rx)	23.44 cm	9.228 in
Radius of gyration (ry)	13.66 cm	5.379 in