I 900x300x11x20 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 900x300x11x20 (México) · Doble T I 900x300x11x20 (Argentina / LATAM) · UB 900 (UK / Australia)

The I 900x300x11x20 steel profile weighs 168.5 kg/m (113.21 lb/ft), has a depth of 900 mm (35.43 in), flange width 300 mm (11.81 in). Cross-sectional area: 21,460 mm². Moment of inertia Ix = 290,665.133 cm⁴, Iy = 9,009.539 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	900 mm	35.43 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	168.5 kg/m	113.21 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	21,460 mm²	33.263 in²
Moment of inertia (Ix)	290,665.13 cm⁴	6983.23 in⁴
Moment of inertia (Iy)	9,009.54 cm⁴	216.45 in⁴
Elastic section modulus (Sx)	6,459.23 cm³	394.168 in³
Elastic section modulus (Sy)	600.64 cm³	36.653 in³
Plastic section modulus (Zx)	7,313.9 cm³	446.323 in³
Plastic section modulus (Zy)	926.02 cm³	56.509 in³
Radius of gyration (rx)	36.8 cm	14.489 in
Radius of gyration (ry)	6.48 cm	2.551 in