CS 650x345 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 650x345 (México) · Doble T CS 650x345 (Argentina / LATAM) · UB 650 (UK / Australia)

The CS 650x345 steel profile weighs 344.6 kg/m (231.58 lb/ft), has a depth of 650 mm (25.59 in), flange width 650 mm (25.59 in). Cross-sectional area: 43,900 mm². Moment of inertia Ix = 351,752.083 cm⁴, Iy = 114,461.378 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	650 mm	25.59 in
Width (b)	650 mm	25.59 in
Web thickness (tw)	19 mm	0.75 in
Flange thickness (tf)	25 mm	0.98 in
Weight	344.6 kg/m	231.58 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	43,900 mm²	68.045 in²
Moment of inertia (Ix)	351,752.08 cm⁴	8450.84 in⁴
Moment of inertia (Iy)	114,461.38 cm⁴	2749.93 in⁴
Elastic section modulus (Sx)	10,823.14 cm³	660.471 in³
Elastic section modulus (Sy)	3,521.89 cm³	214.920 in³
Plastic section modulus (Zx)	11,866.25 cm³	724.126 in³
Plastic section modulus (Zy)	5,335.4 cm³	325.587 in³
Radius of gyration (rx)	28.31 cm	11.144 in
Radius of gyration (ry)	16.15 cm	6.357 in