I 900x400x12x40 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 900x400x12x40 (México) · Doble T I 900x400x12x40 (Argentina / LATAM) · UB 900 (UK / Australia)

The I 900x400x12x40 steel profile weighs 328.4 kg/m (220.71 lb/ft), has a depth of 900 mm (35.43 in), flange width 400 mm (15.75 in). Cross-sectional area: 41,840 mm². Moment of inertia Ix = 647,243.467 cm⁴, Iy = 42,678.475 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	900 mm	35.43 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	12 mm	0.47 in
Flange thickness (tf)	40 mm	1.57 in
Weight	328.4 kg/m	220.71 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	41,840 mm²	64.852 in²
Moment of inertia (Ix)	647,243.47 cm⁴	15550.02 in⁴
Moment of inertia (Iy)	42,678.47 cm⁴	1025.35 in⁴
Elastic section modulus (Sx)	14,383.19 cm³	877.720 in³
Elastic section modulus (Sy)	2,133.92 cm³	130.221 in³
Plastic section modulus (Zx)	15,777.2 cm³	962.788 in³
Plastic section modulus (Zy)	3,229.52 cm³	197.078 in³
Radius of gyration (rx)	39.33 cm	15.485 in
Radius of gyration (ry)	10.1 cm	3.976 in