I 1800x500x20x30 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 1800x500x20x30 (México) · Doble T I 1800x500x20x30 (Argentina / LATAM) · UB 1800 (UK / Australia)

The I 1800x500x20x30 steel profile weighs 508.7 kg/m (341.83 lb/ft), has a depth of 1800 mm (70.87 in), flange width 500 mm (19.69 in). Cross-sectional area: 64,800 mm². Moment of inertia Ix = 3,227,904 cm⁴, Iy = 62,616 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	1800 mm	70.87 in
Width (b)	500 mm	19.69 in
Web thickness (tw)	20 mm	0.79 in
Flange thickness (tf)	30 mm	1.18 in
Weight	508.7 kg/m	341.83 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	64,800 mm²	100.440 in²
Moment of inertia (Ix)	3,227,904 cm⁴	77550.39 in⁴
Moment of inertia (Iy)	62,616 cm⁴	1504.35 in⁴
Elastic section modulus (Sx)	35,865.6 cm³	2188.662 in³
Elastic section modulus (Sy)	2,504.64 cm³	152.843 in³
Plastic section modulus (Zx)	41,688 cm³	2543.969 in³
Plastic section modulus (Zy)	3,924 cm³	239.458 in³
Radius of gyration (rx)	70.58 cm	27.787 in
Radius of gyration (ry)	9.83 cm	3.870 in