W 299 x 78,3 CISC · Weight & Dimensions

CISC, 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 299 x 78,3 (México) · Doble T 299 x 78,3 (Argentina / LATAM) · UB 299 (UK / Australia)

The W 299 x 78,3 steel profile weighs 78.3 kg/m (52.64 lb/ft), has a depth of 299 mm (11.77 in), flange width 306 mm (12.05 in). Cross-sectional area: 9,972.142 mm². Moment of inertia Ix = 16,267.474 cm⁴, Iy = 5,257.718 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	299 mm	11.77 in
Width (b)	306 mm	12.05 in
Web thickness (tw)	11 mm	0.43 in
Flange thickness (tf)	11 mm	0.43 in
Fillet radius (r)	15 mm	0.59 in
Weight	78.3 kg/m	52.64 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	9,972.14 mm²	15.457 in²
Moment of inertia (Ix)	16,267.47 cm⁴	390.83 in⁴
Moment of inertia (Iy)	5,257.72 cm⁴	126.32 in⁴
Elastic section modulus (Sx)	1,088.13 cm³	66.402 in³
Elastic section modulus (Sy)	343.64 cm³	20.970 in³
Plastic section modulus (Zx)	1,206.52 cm³	73.626 in³
Plastic section modulus (Zy)	525.09 cm³	32.043 in³
Radius of gyration (rx)	12.77 cm	5.028 in
Radius of gyration (ry)	7.26 cm	2.859 in