I 400x100x5x12 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 400x100x5x12 (México) · Doble T I 400x100x5x12 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x100x5x12 steel profile weighs 33.6 kg/m (22.58 lb/ft), has a depth of 400 mm (15.75 in), flange width 100 mm (3.94 in). Cross-sectional area: 4,280 mm². Moment of inertia Ix = 11,250.411 cm⁴, Iy = 200.392 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	100 mm	3.94 in
Web thickness (tw)	5 mm	0.20 in
Flange thickness (tf)	12 mm	0.47 in
Weight	33.6 kg/m	22.58 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,280 mm²	6.634 in²
Moment of inertia (Ix)	11,250.41 cm⁴	270.29 in⁴
Moment of inertia (Iy)	200.39 cm⁴	4.81 in⁴
Elastic section modulus (Sx)	562.52 cm³	34.327 in³
Elastic section modulus (Sy)	40.08 cm³	2.446 in³
Plastic section modulus (Zx)	642.32 cm³	39.197 in³
Plastic section modulus (Zy)	62.35 cm³	3.805 in³
Radius of gyration (rx)	16.21 cm	6.383 in
Radius of gyration (ry)	2.16 cm	0.852 in