I 300x100x4x8 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 300x100x4x8 (México) · Doble T I 300x100x4x8 (Argentina / LATAM) · UB 300 (UK / Australia)

The I 300x100x4x8 steel profile weighs 21.5 kg/m (14.45 lb/ft), has a depth of 300 mm (11.81 in), flange width 100 mm (3.94 in). Cross-sectional area: 2,736 mm². Moment of inertia Ix = 4,174.957 cm⁴, Iy = 133.485 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	300 mm	11.81 in
Width (b)	100 mm	3.94 in
Web thickness (tw)	4 mm	0.16 in
Flange thickness (tf)	8 mm	0.31 in
Weight	21.5 kg/m	14.45 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,736 mm²	4.241 in²
Moment of inertia (Ix)	4,174.96 cm⁴	100.30 in⁴
Moment of inertia (Iy)	133.48 cm⁴	3.21 in⁴
Elastic section modulus (Sx)	278.33 cm³	16.985 in³
Elastic section modulus (Sy)	26.7 cm³	1.629 in³
Plastic section modulus (Zx)	314.26 cm³	19.177 in³
Plastic section modulus (Zy)	41.14 cm³	2.510 in³
Radius of gyration (rx)	12.35 cm	4.863 in
Radius of gyration (ry)	2.21 cm	0.870 in