I 450x300x8x12 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 450x300x8x12 (México) · Doble T I 450x300x8x12 (Argentina / LATAM) · UB 450 (UK / Australia)

The I 450x300x8x12 steel profile weighs 83.3 kg/m (55.97 lb/ft), has a depth of 450 mm (17.72 in), flange width 300 mm (11.81 in). Cross-sectional area: 10,608 mm². Moment of inertia Ix = 39,694.478 cm⁴, Iy = 5,401.818 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)	12 mm	0.47 in
Weight	83.3 kg/m	55.97 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	10,608 mm²	16.442 in²
Moment of inertia (Ix)	39,694.48 cm⁴	953.66 in⁴
Moment of inertia (Iy)	5,401.82 cm⁴	129.78 in⁴
Elastic section modulus (Sx)	1,764.2 cm³	107.658 in³
Elastic section modulus (Sy)	360.12 cm³	21.976 in³
Plastic section modulus (Zx)	1,939.75 cm³	118.371 in³
Plastic section modulus (Zy)	546.82 cm³	33.369 in³
Radius of gyration (rx)	19.34 cm	7.616 in
Radius of gyration (ry)	7.14 cm	2.809 in