I 400x400x9.5x15.5 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 400x400x9.5x15.5 (México) · Doble T I 400x400x9.5x15.5 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x9.5x15.5 steel profile weighs 124.9 kg/m (83.91 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 15,905.5 mm². Moment of inertia Ix = 49,832.907 cm⁴, Iy = 16,535.97 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)	9.5 mm	0.37 in
Flange thickness (tf)	15.5 mm	0.61 in
Weight	124.9 kg/m	83.91 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	15,905.5 mm²	24.654 in²
Moment of inertia (Ix)	49,832.91 cm⁴	1197.24 in⁴
Moment of inertia (Iy)	16,535.97 cm⁴	397.28 in⁴
Elastic section modulus (Sx)	2,491.65 cm³	152.050 in³
Elastic section modulus (Sy)	826.8 cm³	50.455 in³
Plastic section modulus (Zx)	2,707.28 cm³	165.209 in³
Plastic section modulus (Zy)	1,248.33 cm³	76.178 in³
Radius of gyration (rx)	17.7 cm	6.969 in
Radius of gyration (ry)	10.2 cm	4.014 in