I 640x300x15.5x25 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 640x300x15.5x25 (México) · Doble T I 640x300x15.5x25 (Argentina / LATAM) · UB 640 (UK / Australia)

The I 640x300x15.5x25 steel profile weighs 189.2 kg/m (127.14 lb/ft), has a depth of 640 mm (25.20 in), flange width 300 mm (11.81 in). Cross-sectional area: 24,145 mm². Moment of inertia Ix = 168,440.621 cm⁴, Iy = 11,268.309 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	640 mm	25.20 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	15.5 mm	0.61 in
Flange thickness (tf)	25 mm	0.98 in
Weight	189.2 kg/m	127.14 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	24,145 mm²	37.425 in²
Moment of inertia (Ix)	168,440.62 cm⁴	4046.79 in⁴
Moment of inertia (Iy)	11,268.31 cm⁴	270.72 in⁴
Elastic section modulus (Sx)	5,263.77 cm³	321.216 in³
Elastic section modulus (Sy)	751.22 cm³	45.842 in³
Plastic section modulus (Zx)	5,961.39 cm³	363.788 in³
Plastic section modulus (Zy)	1,160.44 cm³	70.814 in³
Radius of gyration (rx)	26.41 cm	10.399 in
Radius of gyration (ry)	6.83 cm	2.690 in