I 550x550x30x60 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 550x550x30x60 (México) · Doble T I 550x550x30x60 (Argentina / LATAM) · UB 550 (UK / Australia)

The I 550x550x30x60 steel profile weighs 619.4 kg/m (416.22 lb/ft), has a depth of 550 mm (21.65 in), flange width 550 mm (21.65 in). Cross-sectional area: 78,900 mm². Moment of inertia Ix = 418,021.75 cm⁴, Iy = 166,471.75 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)	30 mm	1.18 in
Flange thickness (tf)	60 mm	2.36 in
Weight	619.4 kg/m	416.22 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	78,900 mm²	122.295 in²
Moment of inertia (Ix)	418,021.75 cm⁴	10042.97 in⁴
Moment of inertia (Iy)	166,471.75 cm⁴	3999.48 in⁴
Elastic section modulus (Sx)	15,200.79 cm³	927.613 in³
Elastic section modulus (Sy)	6,053.52 cm³	369.410 in³
Plastic section modulus (Zx)	17,556.75 cm³	1071.383 in³
Plastic section modulus (Zy)	9,171.75 cm³	559.697 in³
Radius of gyration (rx)	23.02 cm	9.062 in
Radius of gyration (ry)	14.53 cm	5.719 in