I 800x400x11x30 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 800x400x11x30 (México) · Doble T I 800x400x11x30 (Argentina / LATAM) · UB 800 (UK / Australia)

The I 800x400x11x30 steel profile weighs 252.3 kg/m (169.55 lb/ft), has a depth of 800 mm (31.50 in), flange width 400 mm (15.75 in). Cross-sectional area: 32,140 mm². Moment of inertia Ix = 393,065.533 cm⁴, Iy = 32,008.208 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	800 mm	31.50 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	11 mm	0.43 in
Flange thickness (tf)	30 mm	1.18 in
Weight	252.3 kg/m	169.55 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	32,140 mm²	49.817 in²
Moment of inertia (Ix)	393,065.53 cm⁴	9443.40 in⁴
Moment of inertia (Iy)	32,008.21 cm⁴	769.00 in⁴
Elastic section modulus (Sx)	9,826.64 cm³	599.661 in³
Elastic section modulus (Sy)	1,600.41 cm³	97.663 in³
Plastic section modulus (Zx)	10,745.9 cm³	655.758 in³
Plastic section modulus (Zy)	2,422.39 cm³	147.824 in³
Radius of gyration (rx)	34.97 cm	13.768 in
Radius of gyration (ry)	9.98 cm	3.929 in