CS 550x407 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 550x407 (México) · Doble T CS 550x407 (Argentina / LATAM) · UB 550 (UK / Australia)

The CS 550x407 steel profile weighs 407.3 kg/m (273.73 lb/ft), has a depth of 550 mm (21.65 in), flange width 550 mm (21.65 in). Cross-sectional area: 51,890 mm². Moment of inertia Ix = 291,353.073 cm⁴, Iy = 104,028.864 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)	37.5 mm	1.48 in
Weight	407.3 kg/m	273.73 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	51,890 mm²	80.429 in²
Moment of inertia (Ix)	291,353.07 cm⁴	6999.76 in⁴
Moment of inertia (Iy)	104,028.86 cm⁴	2499.29 in⁴
Elastic section modulus (Sx)	10,594.66 cm³	646.528 in³
Elastic section modulus (Sy)	3,782.87 cm³	230.846 in³
Plastic section modulus (Zx)	11,833.81 cm³	722.147 in³
Plastic section modulus (Zy)	5,731.46 cm³	349.757 in³
Radius of gyration (rx)	23.7 cm	9.329 in
Radius of gyration (ry)	14.16 cm	5.574 in