I 350x350x20x35 CISC · Weight & Dimensions

CISC, 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 350x350x20x35 (México) · Doble T I 350x350x20x35 (Argentina / LATAM) · UB 350 (UK / Australia)

The I 350x350x20x35 steel profile weighs 236.3 kg/m (158.78 lb/ft), has a depth of 350 mm (13.78 in), flange width 350 mm (13.78 in). Cross-sectional area: 30,100 mm². Moment of inertia Ix = 64,684.083 cm⁴, Iy = 25,029.083 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	350 mm	13.78 in
Width (b)	350 mm	13.78 in
Web thickness (tw)	20 mm	0.79 in
Flange thickness (tf)	35 mm	1.38 in
Weight	236.3 kg/m	158.78 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	30,100 mm²	46.655 in²
Moment of inertia (Ix)	64,684.08 cm⁴	1554.04 in⁴
Moment of inertia (Iy)	25,029.08 cm⁴	601.32 in⁴
Elastic section modulus (Sx)	3,696.23 cm³	225.559 in³
Elastic section modulus (Sy)	1,430.23 cm³	87.279 in³
Plastic section modulus (Zx)	4,250.75 cm³	259.398 in³
Plastic section modulus (Zy)	2,171.75 cm³	132.529 in³
Radius of gyration (rx)	14.66 cm	5.771 in
Radius of gyration (ry)	9.12 cm	3.590 in