W 431 x 291,2 GOST · Weight & Dimensions

GOST, 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 431 x 291,2 (México) · Doble T 431 x 291,2 (Argentina / LATAM) · UB 431 (UK / Australia)

The W 431 x 291,2 steel profile weighs 291.2 kg/m (195.71 lb/ft), has a depth of 431 mm (16.97 in), flange width 400 mm (15.75 in). Cross-sectional area: 36,718.469 mm². Moment of inertia Ix = 120,355.776 cm⁴, Iy = 37,381.836 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	431 mm	16.97 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	23 mm	0.91 in
Flange thickness (tf)	35 mm	1.38 in
Fillet radius (r)	22 mm	0.87 in
Weight	291.2 kg/m	195.71 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	36,718.47 mm²	56.914 in²
Moment of inertia (Ix)	120,355.78 cm⁴	2891.55 in⁴
Moment of inertia (Iy)	37,381.84 cm⁴	898.10 in⁴
Elastic section modulus (Sx)	5,584.95 cm³	340.816 in³
Elastic section modulus (Sy)	1,869.09 cm³	114.059 in³
Plastic section modulus (Zx)	6,366.3 cm³	388.497 in³
Plastic section modulus (Zy)	2,854.56 cm³	174.197 in³
Radius of gyration (rx)	18.1 cm	7.128 in
Radius of gyration (ry)	10.09 cm	3.972 in