W 340 x 79,7 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 340 x 79,7 (México) · Doble T 340 x 79,7 (Argentina / LATAM) · UB 340 (UK / Australia)

The W 340 x 79,7 steel profile weighs 79.7 kg/m (53.54 lb/ft), has a depth of 340 mm (13.39 in), flange width 250 mm (9.84 in). Cross-sectional area: 10,151.363 mm². Moment of inertia Ix = 21,676.501 cm⁴, Iy = 3,650.973 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	340 mm	13.39 in
Width (b)	250 mm	9.84 in
Web thickness (tw)	9 mm	0.35 in
Flange thickness (tf)	14 mm	0.55 in
Fillet radius (r)	20 mm	0.79 in
Weight	79.7 kg/m	53.54 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	10,151.36 mm²	15.735 in²
Moment of inertia (Ix)	21,676.5 cm⁴	520.78 in⁴
Moment of inertia (Iy)	3,650.97 cm⁴	87.71 in⁴
Elastic section modulus (Sx)	1,275.09 cm³	77.811 in³
Elastic section modulus (Sy)	292.08 cm³	17.824 in³
Plastic section modulus (Zx)	1,412.05 cm³	86.169 in³
Plastic section modulus (Zy)	446.9 cm³	27.271 in³
Radius of gyration (rx)	14.61 cm	5.753 in
Radius of gyration (ry)	6 cm	2.361 in