I 350x350x20x50 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 350x350x20x50 (México) · Doble T I 350x350x20x50 (Argentina / LATAM) · UB 350 (UK / Australia)

The I 350x350x20x50 steel profile weighs 314.0 kg/m (211.01 lb/ft), has a depth of 350 mm (13.78 in), flange width 350 mm (13.78 in). Cross-sectional area: 40,000 mm². Moment of inertia Ix = 82,083.333 cm⁴, Iy = 35,745.833 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)	50 mm	1.97 in
Weight	314.0 kg/m	211.01 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	40,000 mm²	62.000 in²
Moment of inertia (Ix)	82,083.33 cm⁴	1972.05 in⁴
Moment of inertia (Iy)	35,745.83 cm⁴	858.79 in⁴
Elastic section modulus (Sx)	4,690.48 cm³	286.232 in³
Elastic section modulus (Sy)	2,042.62 cm³	124.649 in³
Plastic section modulus (Zx)	5,562.5 cm³	339.446 in³
Plastic section modulus (Zy)	3,087.5 cm³	188.412 in³
Radius of gyration (rx)	14.33 cm	5.640 in
Radius of gyration (ry)	9.45 cm	3.722 in