I 400x150x4x8 Cintac · Weight & Dimensions

Cintac, 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 400x150x4x8 (México) · Doble T I 400x150x4x8 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x150x4x8 steel profile weighs 30.9 kg/m (20.78 lb/ft), has a depth of 400 mm (15.75 in), flange width 150 mm (5.91 in). Cross-sectional area: 3,936 mm². Moment of inertia Ix = 11,108.557 cm⁴, Iy = 450.205 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	150 mm	5.91 in
Web thickness (tw)	4 mm	0.16 in
Flange thickness (tf)	8 mm	0.31 in
Weight	30.9 kg/m	20.78 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,936 mm²	6.101 in²
Moment of inertia (Ix)	11,108.56 cm⁴	266.88 in⁴
Moment of inertia (Iy)	450.2 cm⁴	10.82 in⁴
Elastic section modulus (Sx)	555.43 cm³	33.894 in³
Elastic section modulus (Sy)	60.03 cm³	3.663 in³
Plastic section modulus (Zx)	617.86 cm³	37.704 in³
Plastic section modulus (Zy)	91.54 cm³	5.586 in³
Radius of gyration (rx)	16.8 cm	6.614 in
Radius of gyration (ry)	3.38 cm	1.332 in