W 320 x 78,9 Arval · Weight & Dimensions

Arval, 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 320 x 78,9 (México) · Doble T 320 x 78,9 (Argentina / LATAM) · UB 320 (UK / Australia)

The W 320 x 78,9 steel profile weighs 78.9 kg/m (53.01 lb/ft), has a depth of 320 mm (12.60 in), flange width 300 mm (11.81 in). Cross-sectional area: 10,050.279 mm². Moment of inertia Ix = 19,552.289 cm⁴, Iy = 5,184.738 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	320 mm	12.60 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	8.5 mm	0.33 in
Flange thickness (tf)	11.5 mm	0.45 in
Fillet radius (r)	27 mm	1.06 in
Weight	78.9 kg/m	53.01 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	10,050.28 mm²	15.578 in²
Moment of inertia (Ix)	19,552.29 cm⁴	469.74 in⁴
Moment of inertia (Iy)	5,184.74 cm⁴	124.56 in⁴
Elastic section modulus (Sx)	1,222.02 cm³	74.572 in³
Elastic section modulus (Sy)	345.65 cm³	21.093 in³
Plastic section modulus (Zx)	1,340.92 cm³	81.829 in³
Plastic section modulus (Zy)	529.3 cm³	32.300 in³
Radius of gyration (rx)	13.95 cm	5.491 in
Radius of gyration (ry)	7.18 cm	2.828 in