I 650x650x20x40 CISC · Weight & Dimensions

CISC, 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: I 650x650x20x40 (México) · Doble T I 650x650x20x40 (Argentina / LATAM) · UB 650 (UK / Australia)

The I 650x650x20x40 steel profile weighs 497.7 kg/m (334.45 lb/ft), has a depth of 650 mm (25.59 in), flange width 650 mm (25.59 in). Cross-sectional area: 63,400 mm². Moment of inertia Ix = 515,288.833 cm⁴, Iy = 183,121.333 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)	20 mm	0.79 in
Flange thickness (tf)	40 mm	1.57 in
Weight	497.7 kg/m	334.45 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	63,400 mm²	98.270 in²
Moment of inertia (Ix)	515,288.83 cm⁴	12379.81 in⁴
Moment of inertia (Iy)	183,121.33 cm⁴	4399.49 in⁴
Elastic section modulus (Sx)	15,855.04 cm³	967.538 in³
Elastic section modulus (Sy)	5,634.5 cm³	343.840 in³
Plastic section modulus (Zx)	17,484.5 cm³	1066.974 in³
Plastic section modulus (Zy)	8,507 cm³	519.131 in³
Radius of gyration (rx)	28.51 cm	11.224 in
Radius of gyration (ry)	17 cm	6.691 in