I 900x550x11x40 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 900x550x11x40 (México) · Doble T I 900x550x11x40 (Argentina / LATAM) · UB 900 (UK / Australia)

The I 900x550x11x40 steel profile weighs 416.2 kg/m (279.69 lb/ft), has a depth of 900 mm (35.43 in), flange width 550 mm (21.65 in). Cross-sectional area: 53,020 mm². Moment of inertia Ix = 864,688.733 cm⁴, Iy = 110,925.762 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	900 mm	35.43 in
Width (b)	550 mm	21.65 in
Web thickness (tw)	11 mm	0.43 in
Flange thickness (tf)	40 mm	1.57 in
Weight	416.2 kg/m	279.69 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	53,020 mm²	82.181 in²
Moment of inertia (Ix)	864,688.73 cm⁴	20774.15 in⁴
Moment of inertia (Iy)	110,925.76 cm⁴	2664.99 in⁴
Elastic section modulus (Sx)	19,215.31 cm³	1172.595 in³
Elastic section modulus (Sy)	4,033.66 cm³	246.150 in³
Plastic section modulus (Zx)	20,769.1 cm³	1267.414 in³
Plastic section modulus (Zy)	6,074.81 cm³	370.709 in³
Radius of gyration (rx)	40.38 cm	15.899 in
Radius of gyration (ry)	14.46 cm	5.695 in