I 300x300x10x18 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 300x300x10x18 (México) · Doble T I 300x300x10x18 (Argentina / LATAM) · UB 300 (UK / Australia)

The I 300x300x10x18 steel profile weighs 105.5 kg/m (70.90 lb/ft), has a depth of 300 mm (11.81 in), flange width 300 mm (11.81 in). Cross-sectional area: 13,440 mm². Moment of inertia Ix = 23,033.952 cm⁴, Iy = 8,102.2 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	300 mm	11.81 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	10 mm	0.39 in
Flange thickness (tf)	18 mm	0.71 in
Weight	105.5 kg/m	70.90 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	13,440 mm²	20.832 in²
Moment of inertia (Ix)	23,033.95 cm⁴	553.39 in⁴
Moment of inertia (Iy)	8,102.2 cm⁴	194.66 in⁴
Elastic section modulus (Sx)	1,535.6 cm³	93.708 in³
Elastic section modulus (Sy)	540.15 cm³	32.962 in³
Plastic section modulus (Zx)	1,697.04 cm³	103.560 in³
Plastic section modulus (Zy)	816.6 cm³	49.832 in³
Radius of gyration (rx)	13.09 cm	5.154 in
Radius of gyration (ry)	7.76 cm	3.057 in