I 350x300x6x18 Cintac · Weight & Dimensions

Cintac, welded 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: I 350x300x6x18 (México) · Doble T I 350x300x6x18 (Argentina / LATAM) · UB 350 (UK / Australia)

The I 350x300x6x18 steel profile weighs 99.5 kg/m (66.89 lb/ft), has a depth of 350 mm (13.78 in), flange width 300 mm (11.81 in). Cross-sectional area: 12,684 mm². Moment of inertia Ix = 31,337.597 cm⁴, Iy = 8,100.565 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	350 mm	13.78 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	6 mm	0.24 in
Flange thickness (tf)	18 mm	0.71 in
Weight	99.5 kg/m	66.89 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	12,684 mm²	19.660 in²
Moment of inertia (Ix)	31,337.6 cm⁴	752.89 in⁴
Moment of inertia (Iy)	8,100.57 cm⁴	194.62 in⁴
Elastic section modulus (Sx)	1,790.72 cm³	109.277 in³
Elastic section modulus (Sy)	540.04 cm³	32.955 in³
Plastic section modulus (Zx)	1,940.69 cm³	118.429 in³
Plastic section modulus (Zy)	812.83 cm³	49.602 in³
Radius of gyration (rx)	15.72 cm	6.188 in
Radius of gyration (ry)	7.99 cm	3.146 in