I 450x450x20x40 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 450x450x20x40 (México) · Doble T I 450x450x20x40 (Argentina / LATAM) · UB 450 (UK / Australia)

The I 450x450x20x40 steel profile weighs 340.7 kg/m (228.94 lb/ft), has a depth of 450 mm (17.72 in), flange width 450 mm (17.72 in). Cross-sectional area: 43,400 mm². Moment of inertia Ix = 160,212.167 cm⁴, Iy = 60,774.667 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)	40 mm	1.57 in
Weight	340.7 kg/m	228.94 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	43,400 mm²	67.270 in²
Moment of inertia (Ix)	160,212.17 cm⁴	3849.10 in⁴
Moment of inertia (Iy)	60,774.67 cm⁴	1460.11 in⁴
Elastic section modulus (Sx)	7,120.54 cm³	434.524 in³
Elastic section modulus (Sy)	2,701.1 cm³	164.832 in³
Plastic section modulus (Zx)	8,064.5 cm³	492.128 in³
Plastic section modulus (Zy)	4,087 cm³	249.405 in³
Radius of gyration (rx)	19.21 cm	7.564 in
Radius of gyration (ry)	11.83 cm	4.659 in