I 450x300x8x20 Cintac · Weight & Dimensions

Cintac, 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 450x300x8x20 (México) · Doble T I 450x300x8x20 (Argentina / LATAM) · UB 450 (UK / Australia)

The I 450x300x8x20 steel profile weighs 120.0 kg/m (80.61 lb/ft), has a depth of 450 mm (17.72 in), flange width 300 mm (11.81 in). Cross-sectional area: 15,280 mm². Moment of inertia Ix = 60,104.733 cm⁴, Iy = 9,001.749 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	450 mm	17.72 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	8 mm	0.31 in
Flange thickness (tf)	20 mm	0.79 in
Weight	120.0 kg/m	80.61 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	15,280 mm²	23.684 in²
Moment of inertia (Ix)	60,104.73 cm⁴	1444.02 in⁴
Moment of inertia (Iy)	9,001.75 cm⁴	216.27 in⁴
Elastic section modulus (Sx)	2,671.32 cm³	163.015 in³
Elastic section modulus (Sy)	600.12 cm³	36.622 in³
Plastic section modulus (Zx)	2,916.2 cm³	177.958 in³
Plastic section modulus (Zy)	906.56 cm³	55.322 in³
Radius of gyration (rx)	19.83 cm	7.808 in
Radius of gyration (ry)	7.68 cm	3.022 in