I 450x450x20x50 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 450x450x20x50 (México) · Doble T I 450x450x20x50 (Argentina / LATAM) · UB 450 (UK / Australia)

The I 450x450x20x50 steel profile weighs 408.2 kg/m (274.31 lb/ft), has a depth of 450 mm (17.72 in), flange width 450 mm (17.72 in). Cross-sectional area: 52,000 mm². Moment of inertia Ix = 188,083.333 cm⁴, Iy = 75,960.833 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)	50 mm	1.97 in
Weight	408.2 kg/m	274.31 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	52,000 mm²	80.600 in²
Moment of inertia (Ix)	188,083.33 cm⁴	4518.70 in⁴
Moment of inertia (Iy)	75,960.83 cm⁴	1824.96 in⁴
Elastic section modulus (Sx)	8,359.26 cm³	510.115 in³
Elastic section modulus (Sy)	3,376.04 cm³	206.019 in³
Plastic section modulus (Zx)	9,612.5 cm³	586.593 in³
Plastic section modulus (Zy)	5,097.5 cm³	311.070 in³
Radius of gyration (rx)	19.02 cm	7.488 in
Radius of gyration (ry)	12.09 cm	4.758 in