I 900x400x11x25 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 900x400x11x25 (México) · Doble T I 900x400x11x25 (Argentina / LATAM) · UB 900 (UK / Australia)

The I 900x400x11x25 steel profile weighs 230.4 kg/m (154.83 lb/ft), has a depth of 900 mm (35.43 in), flange width 400 mm (15.75 in). Cross-sectional area: 29,350 mm². Moment of inertia Ix = 439,211.458 cm⁴, Iy = 26,676.095 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	900 mm	35.43 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	230.4 kg/m	154.83 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	29,350 mm²	45.492 in²
Moment of inertia (Ix)	439,211.46 cm⁴	10552.06 in⁴
Moment of inertia (Iy)	26,676.09 cm⁴	640.89 in⁴
Elastic section modulus (Sx)	9,760.25 cm³	595.610 in³
Elastic section modulus (Sy)	1,333.8 cm³	81.394 in³
Plastic section modulus (Zx)	10,736.88 cm³	655.207 in³
Plastic section modulus (Zy)	2,025.71 cm³	123.617 in³
Radius of gyration (rx)	38.68 cm	15.230 in
Radius of gyration (ry)	9.53 cm	3.753 in