I 400x400x15.5x30 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 400x400x15.5x30 (México) · Doble T I 400x400x15.5x30 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x15.5x30 steel profile weighs 229.8 kg/m (154.41 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 29,270 mm². Moment of inertia Ix = 87,396.767 cm⁴, Iy = 32,010.551 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	15.5 mm	0.61 in
Flange thickness (tf)	30 mm	1.18 in
Weight	229.8 kg/m	154.41 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	29,270 mm²	45.368 in²
Moment of inertia (Ix)	87,396.77 cm⁴	2099.71 in⁴
Moment of inertia (Iy)	32,010.55 cm⁴	769.05 in⁴
Elastic section modulus (Sx)	4,369.84 cm³	266.665 in³
Elastic section modulus (Sy)	1,600.53 cm³	97.671 in³
Plastic section modulus (Zx)	4,887.95 cm³	298.282 in³
Plastic section modulus (Zy)	2,420.42 cm³	147.704 in³
Radius of gyration (rx)	17.28 cm	6.803 in
Radius of gyration (ry)	10.46 cm	4.117 in