I 450x300x8x18 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 450x300x8x18 (México) · Doble T I 450x300x8x18 (Argentina / LATAM) · UB 450 (UK / Australia)

The I 450x300x8x18 steel profile weighs 110.8 kg/m (74.43 lb/ft), has a depth of 450 mm (17.72 in), flange width 300 mm (11.81 in). Cross-sectional area: 14,112 mm². Moment of inertia Ix = 55,148.17 cm⁴, Iy = 8,101.766 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)	18 mm	0.71 in
Weight	110.8 kg/m	74.43 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	14,112 mm²	21.874 in²
Moment of inertia (Ix)	55,148.17 cm⁴	1324.93 in⁴
Moment of inertia (Iy)	8,101.77 cm⁴	194.64 in⁴
Elastic section modulus (Sx)	2,451.03 cm³	149.572 in³
Elastic section modulus (Sy)	540.12 cm³	32.960 in³
Plastic section modulus (Zx)	2,675.59 cm³	163.275 in³
Plastic section modulus (Zy)	816.62 cm³	49.834 in³
Radius of gyration (rx)	19.77 cm	7.783 in
Radius of gyration (ry)	7.58 cm	2.983 in