I 400x180x8x15.5 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 400x180x8x15.5 (México) · Doble T I 400x180x8x15.5 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x180x8x15.5 steel profile weighs 67.0 kg/m (45.01 lb/ft), has a depth of 400 mm (15.75 in), flange width 180 mm (7.09 in). Cross-sectional area: 8,532 mm². Moment of inertia Ix = 23,984.447 cm⁴, Iy = 1,508.174 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	180 mm	7.09 in
Web thickness (tw)	8 mm	0.31 in
Flange thickness (tf)	15.5 mm	0.61 in
Weight	67.0 kg/m	45.01 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	8,532 mm²	13.225 in²
Moment of inertia (Ix)	23,984.45 cm⁴	576.23 in⁴
Moment of inertia (Iy)	1,508.17 cm⁴	36.23 in⁴
Elastic section modulus (Sx)	1,199.22 cm³	73.181 in³
Elastic section modulus (Sy)	167.57 cm³	10.226 in³
Plastic section modulus (Zx)	1,345.08 cm³	82.082 in³
Plastic section modulus (Zy)	257 cm³	15.683 in³
Radius of gyration (rx)	16.77 cm	6.601 in
Radius of gyration (ry)	4.2 cm	1.655 in