CS 350x128 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 350x128 (México) · Doble T CS 350x128 (Argentina / LATAM) · UB 350 (UK / Australia)

The CS 350x128 steel profile weighs 127.6 kg/m (85.77 lb/ft), has a depth of 350 mm (13.78 in), flange width 350 mm (13.78 in). Cross-sectional area: 16,264 mm². Moment of inertia Ix = 38,873.44 cm⁴, Iy = 13,579.313 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	350 mm	13.78 in
Width (b)	350 mm	13.78 in
Web thickness (tw)	9.5 mm	0.37 in
Flange thickness (tf)	19 mm	0.75 in
Weight	127.6 kg/m	85.77 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	16,264 mm²	25.209 in²
Moment of inertia (Ix)	38,873.44 cm⁴	933.93 in⁴
Moment of inertia (Iy)	13,579.31 cm⁴	326.24 in⁴
Elastic section modulus (Sx)	2,221.34 cm³	135.555 in³
Elastic section modulus (Sy)	775.96 cm³	47.352 in³
Plastic section modulus (Zx)	2,432.34 cm³	148.431 in³
Plastic section modulus (Zy)	1,170.79 cm³	71.446 in³
Radius of gyration (rx)	15.46 cm	6.087 in
Radius of gyration (ry)	9.14 cm	3.597 in