I 400x100x4x8 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 400x100x4x8 (México) · Doble T I 400x100x4x8 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x100x4x8 steel profile weighs 24.6 kg/m (16.56 lb/ft), has a depth of 400 mm (15.75 in), flange width 100 mm (3.94 in). Cross-sectional area: 3,136 mm². Moment of inertia Ix = 8,034.85 cm⁴, Iy = 133.538 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	100 mm	3.94 in
Web thickness (tw)	4 mm	0.16 in
Flange thickness (tf)	8 mm	0.31 in
Weight	24.6 kg/m	16.56 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,136 mm²	4.861 in²
Moment of inertia (Ix)	8,034.85 cm⁴	193.04 in⁴
Moment of inertia (Iy)	133.54 cm⁴	3.21 in⁴
Elastic section modulus (Sx)	401.74 cm³	24.516 in³
Elastic section modulus (Sy)	26.71 cm³	1.630 in³
Plastic section modulus (Zx)	461.06 cm³	28.135 in³
Plastic section modulus (Zy)	41.54 cm³	2.535 in³
Radius of gyration (rx)	16.01 cm	6.302 in
Radius of gyration (ry)	2.06 cm	0.812 in