W 400 x 66,0 KS · Weight & Dimensions

KS, 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 66,0 (México) · Doble T 400 x 66,0 (Argentina / LATAM) · UB 400 (UK / Australia)

The W 400 x 66,0 steel profile weighs 66.0 kg/m (44.37 lb/ft), has a depth of 400 mm (15.75 in), flange width 200 mm (7.87 in). Cross-sectional area: 8,411.752 mm². Moment of inertia Ix = 23,704.426 cm⁴, Iy = 1,736.387 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	200 mm	7.87 in
Web thickness (tw)	8 mm	0.31 in
Flange thickness (tf)	13 mm	0.51 in
Fillet radius (r)	16 mm	0.63 in
Weight	66.0 kg/m	44.37 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	8,411.75 mm²	13.038 in²
Moment of inertia (Ix)	23,704.43 cm⁴	569.50 in⁴
Moment of inertia (Iy)	1,736.39 cm⁴	41.72 in⁴
Elastic section modulus (Sx)	1,185.22 cm³	72.327 in³
Elastic section modulus (Sy)	173.64 cm³	10.596 in³
Plastic section modulus (Zx)	1,326.26 cm³	80.934 in³
Plastic section modulus (Zy)	267.65 cm³	16.333 in³
Radius of gyration (rx)	16.79 cm	6.609 in
Radius of gyration (ry)	4.54 cm	1.789 in