VS 800x129 · Weight & Dimensions

BR — 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: VS 800x129 (México) · Doble T VS 800x129 (Argentina / LATAM) · UB 800 (UK / Australia)

The VS 800x129 steel profile weighs 128.6 kg/m (86.42 lb/ft), has a depth of 800 mm (31.50 in), flange width 320 mm (12.60 in). Cross-sectional area: 16,384 mm². Moment of inertia Ix = 187,572.77 cm⁴, Iy = 8,741.41 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	800 mm	31.50 in
Width (b)	320 mm	12.60 in
Web thickness (tw)	8 mm	0.31 in
Flange thickness (tf)	16 mm	0.63 in
Weight	128.6 kg/m	86.42 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	16,384 mm²	25.395 in²
Moment of inertia (Ix)	187,572.77 cm⁴	4506.44 in⁴
Moment of inertia (Iy)	8,741.41 cm⁴	210.01 in⁴
Elastic section modulus (Sx)	4,689.32 cm³	286.161 in³
Elastic section modulus (Sy)	546.34 cm³	33.340 in³
Plastic section modulus (Zx)	5,193.73 cm³	316.942 in³
Plastic section modulus (Zy)	831.49 cm³	50.741 in³
Radius of gyration (rx)	33.84 cm	13.323 in
Radius of gyration (ry)	7.3 cm	2.874 in