I 800x400x11x25 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 800x400x11x25 (México) · Doble T I 800x400x11x25 (Argentina / LATAM) · UB 800 (UK / Australia)

The I 800x400x11x25 steel profile weighs 221.8 kg/m (149.02 lb/ft), has a depth of 800 mm (31.50 in), flange width 400 mm (15.75 in). Cross-sectional area: 28,250 mm². Moment of inertia Ix = 339,088.542 cm⁴, Iy = 26,674.985 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)	25 mm	0.98 in
Weight	221.8 kg/m	149.02 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	28,250 mm²	43.788 in²
Moment of inertia (Ix)	339,088.54 cm⁴	8146.60 in⁴
Moment of inertia (Iy)	26,674.99 cm⁴	640.87 in⁴
Elastic section modulus (Sx)	8,477.21 cm³	517.313 in³
Elastic section modulus (Sy)	1,333.75 cm³	81.391 in³
Plastic section modulus (Zx)	9,296.88 cm³	567.332 in³
Plastic section modulus (Zy)	2,022.69 cm³	123.432 in³
Radius of gyration (rx)	34.65 cm	13.640 in
Radius of gyration (ry)	9.72 cm	3.826 in