CS 550x441 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 550x441 (México) · Doble T CS 550x441 (Argentina / LATAM) · UB 550 (UK / Australia)

The CS 550x441 steel profile weighs 441.3 kg/m (296.52 lb/ft), has a depth of 550 mm (21.65 in), flange width 550 mm (21.65 in). Cross-sectional area: 56,212.5 mm². Moment of inertia Ix = 299,480.273 cm⁴, Iy = 104,108.096 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)	31.5 mm	1.24 in
Flange thickness (tf)	37.5 mm	1.48 in
Weight	441.3 kg/m	296.52 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	56,212.5 mm²	87.129 in²
Moment of inertia (Ix)	299,480.27 cm⁴	7195.01 in⁴
Moment of inertia (Iy)	104,108.1 cm⁴	2501.20 in⁴
Elastic section modulus (Sx)	10,890.19 cm³	664.563 in³
Elastic section modulus (Sy)	3,785.75 cm³	231.022 in³
Plastic section modulus (Zx)	12,347.11 cm³	753.470 in³
Plastic section modulus (Zy)	5,789.7 cm³	353.311 in³
Radius of gyration (rx)	23.08 cm	9.087 in
Radius of gyration (ry)	13.61 cm	5.358 in