I 446x366x20x40 IAS · Weight & Dimensions

IAS, 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 446x366x20x40 (México) · Doble T I 446x366x20x40 (Argentina / LATAM) · UB 446 (UK / Australia)

The I 446x366x20x40 steel profile weighs 287.3 kg/m (193.07 lb/ft), has a depth of 446 mm (17.56 in), flange width 366 mm (14.41 in). Cross-sectional area: 36,600 mm². Moment of inertia Ix = 129,221.668 cm⁴, Iy = 32,709.664 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	446 mm	17.56 in
Width (b)	366 mm	14.41 in
Web thickness (tw)	20 mm	0.79 in
Flange thickness (tf)	40 mm	1.57 in
Weight	287.3 kg/m	193.07 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	36,600 mm²	56.730 in²
Moment of inertia (Ix)	129,221.67 cm⁴	3104.55 in⁴
Moment of inertia (Iy)	32,709.66 cm⁴	785.85 in⁴
Elastic section modulus (Sx)	5,794.69 cm³	353.615 in³
Elastic section modulus (Sy)	1,787.41 cm³	109.075 in³
Plastic section modulus (Zx)	6,613.62 cm³	403.590 in³
Plastic section modulus (Zy)	2,715.72 cm³	165.724 in³
Radius of gyration (rx)	18.79 cm	7.398 in
Radius of gyration (ry)	9.45 cm	3.722 in