I 400x300x6x12 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 400x300x6x12 (México) · Doble T I 400x300x6x12 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x300x6x12 steel profile weighs 74.3 kg/m (49.90 lb/ft), has a depth of 400 mm (15.75 in), flange width 300 mm (11.81 in). Cross-sectional area: 9,456 mm². Moment of inertia Ix = 29,764.429 cm⁴, Iy = 5,400.677 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	6 mm	0.24 in
Flange thickness (tf)	12 mm	0.47 in
Weight	74.3 kg/m	49.90 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	9,456 mm²	14.657 in²
Moment of inertia (Ix)	29,764.43 cm⁴	715.09 in⁴
Moment of inertia (Iy)	5,400.68 cm⁴	129.75 in⁴
Elastic section modulus (Sx)	1,488.22 cm³	90.817 in³
Elastic section modulus (Sy)	360.05 cm³	21.971 in³
Plastic section modulus (Zx)	1,608.86 cm³	98.179 in³
Plastic section modulus (Zy)	543.38 cm³	33.159 in³
Radius of gyration (rx)	17.74 cm	6.985 in
Radius of gyration (ry)	7.56 cm	2.975 in