I 400x400x12x16 Cintac · Weight & Dimensions

Cintac, 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.

Also known as: I 400x400x12x16 (México) · Doble T I 400x400x12x16 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x12x16 steel profile weighs 135.2 kg/m (90.84 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 17,216 mm². Moment of inertia Ix = 52,196.83 cm⁴, Iy = 17,071.966 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 mm	0.47 in
Flange thickness (tf)	16 mm	0.63 in
Weight	135.2 kg/m	90.84 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	17,216 mm²	26.685 in²
Moment of inertia (Ix)	52,196.83 cm⁴	1254.03 in⁴
Moment of inertia (Iy)	17,071.97 cm⁴	410.15 in⁴
Elastic section modulus (Sx)	2,609.84 cm³	159.263 in³
Elastic section modulus (Sy)	853.6 cm³	52.090 in³
Plastic section modulus (Zx)	2,863.87 cm³	174.765 in³
Plastic section modulus (Zy)	1,293.25 cm³	78.919 in³
Radius of gyration (rx)	17.41 cm	6.855 in
Radius of gyration (ry)	9.96 cm	3.920 in