I 300x300x8x12 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 300x300x8x12 (México) · Doble T I 300x300x8x12 (Argentina / LATAM) · UB 300 (UK / Australia)

The I 300x300x8x12 steel profile weighs 73.9 kg/m (49.64 lb/ft), has a depth of 300 mm (11.81 in), flange width 300 mm (11.81 in). Cross-sectional area: 9,408 mm². Moment of inertia Ix = 16,340.198 cm⁴, Iy = 5,401.178 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)	8 mm	0.31 in
Flange thickness (tf)	12 mm	0.47 in
Weight	73.9 kg/m	49.64 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	9,408 mm²	14.582 in²
Moment of inertia (Ix)	16,340.2 cm⁴	392.57 in⁴
Moment of inertia (Iy)	5,401.18 cm⁴	129.76 in⁴
Elastic section modulus (Sx)	1,089.35 cm³	66.476 in³
Elastic section modulus (Sy)	360.08 cm³	21.973 in³
Plastic section modulus (Zx)	1,189.15 cm³	72.567 in³
Plastic section modulus (Zy)	544.42 cm³	33.222 in³
Radius of gyration (rx)	13.18 cm	5.189 in
Radius of gyration (ry)	7.58 cm	2.983 in