I 400x400x20x40 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 400x400x20x40 (México) · Doble T I 400x400x20x40 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x20x40 steel profile weighs 301.4 kg/m (202.57 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 38,400 mm². Moment of inertia Ix = 109,568 cm⁴, Iy = 42,688 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)	20 mm	0.79 in
Flange thickness (tf)	40 mm	1.57 in
Weight	301.4 kg/m	202.57 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	38,400 mm²	59.520 in²
Moment of inertia (Ix)	109,568 cm⁴	2632.37 in⁴
Moment of inertia (Iy)	42,688 cm⁴	1025.58 in⁴
Elastic section modulus (Sx)	5,478.4 cm³	334.314 in³
Elastic section modulus (Sy)	2,134.4 cm³	130.250 in³
Plastic section modulus (Zx)	6,272 cm³	382.743 in³
Plastic section modulus (Zy)	3,232 cm³	197.230 in³
Radius of gyration (rx)	16.89 cm	6.650 in
Radius of gyration (ry)	10.54 cm	4.151 in