W 990 x 230,7 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 990 x 230,7 (México) · Doble T 990 x 230,7 (Argentina / LATAM) · UB 990 (UK / Australia)

The W 990 x 230,7 steel profile weighs 230.7 kg/m (155.00 lb/ft), has a depth of 990 mm (38.98 in), flange width 320 mm (12.60 in). Cross-sectional area: 29,380.567 mm². Moment of inertia Ix = 446,009.326 cm⁴, Iy = 11,520.3 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	990 mm	38.98 in
Width (b)	320 mm	12.60 in
Web thickness (tw)	16 mm	0.63 in
Flange thickness (tf)	21 mm	0.83 in
Fillet radius (r)	30 mm	1.18 in
Weight	230.7 kg/m	155.00 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	29,380.57 mm²	45.540 in²
Moment of inertia (Ix)	446,009.33 cm⁴	10715.37 in⁴
Moment of inertia (Iy)	11,520.3 cm⁴	276.78 in⁴
Elastic section modulus (Sx)	9,010.29 cm³	549.844 in³
Elastic section modulus (Sy)	720.02 cm³	43.938 in³
Plastic section modulus (Zx)	10,467.52 cm³	638.770 in³
Plastic section modulus (Zy)	1,147.23 cm³	70.009 in³
Radius of gyration (rx)	38.96 cm	15.339 in
Radius of gyration (ry)	6.26 cm	2.465 in