I 800x300x11x20 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 800x300x11x20 (México) · Doble T I 800x300x11x20 (Argentina / LATAM) · UB 800 (UK / Australia)

The I 800x300x11x20 steel profile weighs 159.8 kg/m (107.41 lb/ft), has a depth of 800 mm (31.50 in), flange width 300 mm (11.81 in). Cross-sectional area: 20,360 mm². Moment of inertia Ix = 222,799.467 cm⁴, Iy = 9,008.43 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	800 mm	31.50 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	11 mm	0.43 in
Flange thickness (tf)	20 mm	0.79 in
Weight	159.8 kg/m	107.41 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	20,360 mm²	31.558 in²
Moment of inertia (Ix)	222,799.47 cm⁴	5352.76 in⁴
Moment of inertia (Iy)	9,008.43 cm⁴	216.43 in⁴
Elastic section modulus (Sx)	5,569.99 cm³	339.903 in³
Elastic section modulus (Sy)	600.56 cm³	36.649 in³
Plastic section modulus (Zx)	6,268.4 cm³	382.523 in³
Plastic section modulus (Zy)	922.99 cm³	56.325 in³
Radius of gyration (rx)	33.08 cm	13.024 in
Radius of gyration (ry)	6.65 cm	2.619 in