I 840x290x20x50 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.

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Also known as: I 840x290x20x50 (México) · Doble T I 840x290x20x50 (Argentina / LATAM) · UB 840 (UK / Australia)

The I 840x290x20x50 steel profile weighs 343.8 kg/m (231.05 lb/ft), has a depth of 840 mm (33.07 in), flange width 290 mm (11.42 in). Cross-sectional area: 43,800 mm². Moment of inertia Ix = 520,614 cm⁴, Iy = 20,373.5 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	840 mm	33.07 in
Width (b)	290 mm	11.42 in
Web thickness (tw)	20 mm	0.79 in
Flange thickness (tf)	50 mm	1.97 in
Weight	343.8 kg/m	231.05 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	43,800 mm²	67.890 in²
Moment of inertia (Ix)	520,614 cm⁴	12507.75 in⁴
Moment of inertia (Iy)	20,373.5 cm⁴	489.47 in⁴
Elastic section modulus (Sx)	12,395.57 cm³	756.427 in³
Elastic section modulus (Sy)	1,405.07 cm³	85.743 in³
Plastic section modulus (Zx)	14,193 cm³	866.114 in³
Plastic section modulus (Zy)	2,176.5 cm³	132.819 in³
Radius of gyration (rx)	34.48 cm	13.573 in
Radius of gyration (ry)	6.82 cm	2.685 in