I 400x400x12x20 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 400x400x12x20 (México) · Doble T I 400x400x12x20 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x12x20 steel profile weighs 159.5 kg/m (107.19 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 20,320 mm². Moment of inertia Ix = 62,478.933 cm⁴, Iy = 21,338.517 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)	20 mm	0.79 in
Weight	159.5 kg/m	107.19 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	20,320 mm²	31.496 in²
Moment of inertia (Ix)	62,478.93 cm⁴	1501.06 in⁴
Moment of inertia (Iy)	21,338.52 cm⁴	512.66 in⁴
Elastic section modulus (Sx)	3,123.95 cm³	190.636 in³
Elastic section modulus (Sy)	1,066.93 cm³	65.108 in³
Plastic section modulus (Zx)	3,428.8 cm³	209.239 in³
Plastic section modulus (Zy)	1,612.96 cm³	98.429 in³
Radius of gyration (rx)	17.53 cm	6.904 in
Radius of gyration (ry)	10.25 cm	4.034 in