W 400 x 66,3 Cintac · Weight & Dimensions

Cintac, hot-rolled 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: IPR 400 x 66,3 (México) · Doble T 400 x 66,3 (Argentina / LATAM) · UB 400 (UK / Australia)

The W 400 x 66,3 steel profile weighs 66.3 kg/m (44.57 lb/ft), has a depth of 400 mm (15.75 in), flange width 180 mm (7.09 in). Cross-sectional area: 8,409.058 mm². Moment of inertia Ix = 23,085.123 cm⁴, Iy = 1,317.722 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	180 mm	7.09 in
Web thickness (tw)	8.5 mm	0.33 in
Flange thickness (tf)	13.5 mm	0.53 in
Fillet radius (r)	21 mm	0.83 in
Weight	66.3 kg/m	44.57 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	8,409.06 mm²	13.034 in²
Moment of inertia (Ix)	23,085.12 cm⁴	554.62 in⁴
Moment of inertia (Iy)	1,317.72 cm⁴	31.66 in⁴
Elastic section modulus (Sx)	1,154.26 cm³	70.437 in³
Elastic section modulus (Sy)	146.41 cm³	8.935 in³
Plastic section modulus (Zx)	1,303.67 cm³	79.555 in³
Plastic section modulus (Zy)	228.82 cm³	13.964 in³
Radius of gyration (rx)	16.57 cm	6.523 in
Radius of gyration (ry)	3.96 cm	1.558 in