I 900x350x12x18 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 900x350x12x18 (México) · Doble T I 900x350x12x18 (Argentina / LATAM) · UB 900 (UK / Australia)

The I 900x350x12x18 steel profile weighs 180.3 kg/m (121.17 lb/ft), has a depth of 900 mm (35.43 in), flange width 350 mm (13.78 in). Cross-sectional area: 22,968 mm². Moment of inertia Ix = 309,577.334 cm⁴, Iy = 12,874.942 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	900 mm	35.43 in
Width (b)	350 mm	13.78 in
Web thickness (tw)	12 mm	0.47 in
Flange thickness (tf)	18 mm	0.71 in
Weight	180.3 kg/m	121.17 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	22,968 mm²	35.600 in²
Moment of inertia (Ix)	309,577.33 cm⁴	7437.60 in⁴
Moment of inertia (Iy)	12,874.94 cm⁴	309.32 in⁴
Elastic section modulus (Sx)	6,879.5 cm³	419.814 in³
Elastic section modulus (Sy)	735.71 cm³	44.896 in³
Plastic section modulus (Zx)	7,796.09 cm³	475.748 in³
Plastic section modulus (Zy)	1,133.6 cm³	69.177 in³
Radius of gyration (rx)	36.71 cm	14.454 in
Radius of gyration (ry)	7.49 cm	2.948 in