UB 406x140x46 · Weight & Dimensions

EN — 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: UB 406x140x46 (México) · Doble T UB 406x140x46 (Argentina / LATAM) · UB 403.2 (UK / Australia)

The UB 406x140x46 steel profile weighs 46.0 kg/m (30.91 lb/ft), has a depth of 403.2 mm (15.87 in), flange width 142.2 mm (5.60 in). Cross-sectional area: 5,774.7 mm². Moment of inertia Ix = 15,368.99 cm⁴, Iy = 537.74 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	403.2 mm	15.87 in
Width (b)	142.2 mm	5.60 in
Web thickness (tw)	6.8 mm	0.27 in
Flange thickness (tf)	11.2 mm	0.44 in
Fillet radius (r)	10.2 mm	0.40 in
Weight	46.0 kg/m	30.91 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	5,774.7 mm²	8.951 in²
Moment of inertia (Ix)	15,368.99 cm⁴	369.24 in⁴
Moment of inertia (Iy)	537.74 cm⁴	12.92 in⁴
Elastic section modulus (Sx)	762.35 cm³	46.522 in³
Elastic section modulus (Sy)	75.63 cm³	4.615 in³
Plastic section modulus (Zx)	870.83 cm³	53.142 in³
Plastic section modulus (Zy)	117.64 cm³	7.179 in³
Radius of gyration (rx)	16.31 cm	6.421 in
Radius of gyration (ry)	3.05 cm	1.201 in