I 400x300x6x20 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 400x300x6x20 (México) · Doble T I 400x300x6x20 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x300x6x20 steel profile weighs 111.2 kg/m (74.70 lb/ft), has a depth of 400 mm (15.75 in), flange width 300 mm (11.81 in). Cross-sectional area: 14,160 mm². Moment of inertia Ix = 45,692.8 cm⁴, Iy = 9,000.648 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)	20 mm	0.79 in
Weight	111.2 kg/m	74.70 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	14,160 mm²	21.948 in²
Moment of inertia (Ix)	45,692.8 cm⁴	1097.77 in⁴
Moment of inertia (Iy)	9,000.65 cm⁴	216.24 in⁴
Elastic section modulus (Sx)	2,284.64 cm³	139.418 in³
Elastic section modulus (Sy)	600.04 cm³	36.617 in³
Plastic section modulus (Zx)	2,474.4 cm³	150.998 in³
Plastic section modulus (Zy)	903.24 cm³	55.119 in³
Radius of gyration (rx)	17.96 cm	7.072 in
Radius of gyration (ry)	7.97 cm	3.139 in