W 400 x 171,7 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 171,7 (México) · Doble T 400 x 171,7 (Argentina / LATAM) · UB 400 (UK / Australia)

The W 400 x 171,7 steel profile weighs 171.7 kg/m (115.37 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 21,869.469 mm². Moment of inertia Ix = 66,621.411 cm⁴, Iy = 22,412.674 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	13 mm	0.51 in
Flange thickness (tf)	21 mm	0.83 in
Fillet radius (r)	22 mm	0.87 in
Weight	171.7 kg/m	115.37 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	21,869.47 mm²	33.898 in²
Moment of inertia (Ix)	66,621.41 cm⁴	1600.58 in⁴
Moment of inertia (Iy)	22,412.67 cm⁴	538.46 in⁴
Elastic section modulus (Sx)	3,331.07 cm³	203.275 in³
Elastic section modulus (Sy)	1,120.63 cm³	68.386 in³
Plastic section modulus (Zx)	3,672.46 cm³	224.108 in³
Plastic section modulus (Zy)	1,699.87 cm³	103.733 in³
Radius of gyration (rx)	17.45 cm	6.872 in
Radius of gyration (ry)	10.12 cm	3.986 in