I 400x400x12.5x15.5 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 400x400x12.5x15.5 (México) · Doble T I 400x400x12.5x15.5 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x12.5x15.5 steel profile weighs 133.6 kg/m (89.75 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 17,012.5 mm². Moment of inertia Ix = 51,088.992 cm⁴, Iy = 16,539.339 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)	15.5 mm	0.61 in
Weight	133.6 kg/m	89.75 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	17,012.5 mm²	26.369 in²
Moment of inertia (Ix)	51,088.99 cm⁴	1227.41 in⁴
Moment of inertia (Iy)	16,539.34 cm⁴	397.36 in⁴
Elastic section modulus (Sx)	2,554.45 cm³	155.883 in³
Elastic section modulus (Sy)	826.97 cm³	50.465 in³
Plastic section modulus (Zx)	2,809.4 cm³	171.441 in³
Plastic section modulus (Zy)	1,254.41 cm³	76.549 in³
Radius of gyration (rx)	17.33 cm	6.823 in
Radius of gyration (ry)	9.86 cm	3.882 in