CS 550x395 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 550x395 (México) · Doble T CS 550x395 (Argentina / LATAM) · UB 550 (UK / Australia)

The CS 550x395 steel profile weighs 394.7 kg/m (265.24 lb/ft), has a depth of 550 mm (21.65 in), flange width 550 mm (21.65 in). Cross-sectional area: 50,275 mm². Moment of inertia Ix = 288,316.536 cm⁴, Iy = 104,011.525 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)	37.5 mm	1.48 in
Weight	394.7 kg/m	265.24 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	50,275 mm²	77.926 in²
Moment of inertia (Ix)	288,316.54 cm⁴	6926.80 in⁴
Moment of inertia (Iy)	104,011.53 cm⁴	2498.88 in⁴
Elastic section modulus (Sx)	10,484.24 cm³	639.790 in³
Elastic section modulus (Sy)	3,782.24 cm³	230.807 in³
Plastic section modulus (Zx)	11,642.03 cm³	710.443 in³
Plastic section modulus (Zy)	5,714.74 cm³	348.737 in³
Radius of gyration (rx)	23.95 cm	9.428 in
Radius of gyration (ry)	14.38 cm	5.663 in