I 640x240x15.5x30 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 640x240x15.5x30 (México) · Doble T I 640x240x15.5x30 (Argentina / LATAM) · UB 640 (UK / Australia)

The I 640x240x15.5x30 steel profile weighs 183.6 kg/m (123.39 lb/ft), has a depth of 640 mm (25.20 in), flange width 240 mm (9.45 in). Cross-sectional area: 23,390 mm². Moment of inertia Ix = 159,265.967 cm⁴, Iy = 6,929.999 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	640 mm	25.20 in
Width (b)	240 mm	9.45 in
Web thickness (tw)	15.5 mm	0.61 in
Flange thickness (tf)	30 mm	1.18 in
Weight	183.6 kg/m	123.39 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	23,390 mm²	36.255 in²
Moment of inertia (Ix)	159,265.97 cm⁴	3826.36 in⁴
Moment of inertia (Iy)	6,930 cm⁴	166.49 in⁴
Elastic section modulus (Sx)	4,977.06 cm³	303.720 in³
Elastic section modulus (Sy)	577.5 cm³	35.241 in³
Plastic section modulus (Zx)	5,695.55 cm³	347.565 in³
Plastic section modulus (Zy)	898.84 cm³	54.851 in³
Radius of gyration (rx)	26.09 cm	10.273 in
Radius of gyration (ry)	5.44 cm	2.143 in