I 450x450x11x20 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 450x450x11x20 (México) · Doble T I 450x450x11x20 (Argentina / LATAM) · UB 450 (UK / Australia)

The I 450x450x11x20 steel profile weighs 176.7 kg/m (118.74 lb/ft), has a depth of 450 mm (17.72 in), flange width 450 mm (17.72 in). Cross-sectional area: 22,510 mm². Moment of inertia Ix = 89,582.758 cm⁴, Iy = 30,379.548 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	450 mm	17.72 in
Width (b)	450 mm	17.72 in
Web thickness (tw)	11 mm	0.43 in
Flange thickness (tf)	20 mm	0.79 in
Weight	176.7 kg/m	118.74 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	22,510 mm²	34.890 in²
Moment of inertia (Ix)	89,582.76 cm⁴	2152.23 in⁴
Moment of inertia (Iy)	30,379.55 cm⁴	729.87 in⁴
Elastic section modulus (Sx)	3,981.46 cm³	242.964 in³
Elastic section modulus (Sy)	1,350.2 cm³	82.395 in³
Plastic section modulus (Zx)	4,332.28 cm³	264.373 in³
Plastic section modulus (Zy)	2,037.4 cm³	124.330 in³
Radius of gyration (rx)	19.95 cm	7.854 in
Radius of gyration (ry)	11.62 cm	4.574 in