I 400x300x8x25 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 400x300x8x25 (México) · Doble T I 400x300x8x25 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x300x8x25 steel profile weighs 139.7 kg/m (93.90 lb/ft), has a depth of 400 mm (15.75 in), flange width 300 mm (11.81 in). Cross-sectional area: 17,800 mm². Moment of inertia Ix = 55,670.833 cm⁴, Iy = 11,251.493 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)	8 mm	0.31 in
Flange thickness (tf)	25 mm	0.98 in
Weight	139.7 kg/m	93.90 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	17,800 mm²	27.590 in²
Moment of inertia (Ix)	55,670.83 cm⁴	1337.49 in⁴
Moment of inertia (Iy)	11,251.49 cm⁴	270.32 in⁴
Elastic section modulus (Sx)	2,783.54 cm³	169.863 in³
Elastic section modulus (Sy)	750.1 cm³	45.774 in³
Plastic section modulus (Zx)	3,057.5 cm³	186.581 in³
Plastic section modulus (Zy)	1,130.6 cm³	68.994 in³
Radius of gyration (rx)	17.68 cm	6.963 in
Radius of gyration (ry)	7.95 cm	3.130 in