I 400x400x12.5x25 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 400x400x12.5x25 (México) · Doble T I 400x400x12.5x25 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x12.5x25 steel profile weighs 191.3 kg/m (128.58 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 24,375 mm². Moment of inertia Ix = 74,882.813 cm⁴, Iy = 26,672.363 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)	12.5 mm	0.49 in
Flange thickness (tf)	25 mm	0.98 in
Weight	191.3 kg/m	128.58 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	24,375 mm²	37.781 in²
Moment of inertia (Ix)	74,882.81 cm⁴	1799.06 in⁴
Moment of inertia (Iy)	26,672.36 cm⁴	640.80 in⁴
Elastic section modulus (Sx)	3,744.14 cm³	228.482 in³
Elastic section modulus (Sy)	1,333.62 cm³	81.383 in³
Plastic section modulus (Zx)	4,132.81 cm³	252.201 in³
Plastic section modulus (Zy)	2,013.67 cm³	122.882 in³
Radius of gyration (rx)	17.53 cm	6.901 in
Radius of gyration (ry)	10.46 cm	4.118 in