I 450x450x20x30 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 450x450x20x30 (México) · Doble T I 450x450x20x30 (Argentina / LATAM) · UB 450 (UK / Australia)

The I 450x450x20x30 steel profile weighs 273.2 kg/m (183.58 lb/ft), has a depth of 450 mm (17.72 in), flange width 450 mm (17.72 in). Cross-sectional area: 34,800 mm². Moment of inertia Ix = 129,159 cm⁴, Iy = 45,588.5 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)	20 mm	0.79 in
Flange thickness (tf)	30 mm	1.18 in
Weight	273.2 kg/m	183.58 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	34,800 mm²	53.940 in²
Moment of inertia (Ix)	129,159 cm⁴	3103.04 in⁴
Moment of inertia (Iy)	45,588.5 cm⁴	1095.26 in⁴
Elastic section modulus (Sx)	5,740.4 cm³	350.302 in³
Elastic section modulus (Sy)	2,026.16 cm³	123.644 in³
Plastic section modulus (Zx)	6,430.5 cm³	392.415 in³
Plastic section modulus (Zy)	3,076.5 cm³	187.740 in³
Radius of gyration (rx)	19.27 cm	7.585 in
Radius of gyration (ry)	11.45 cm	4.506 in