I 400x400x16x28 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 400x400x16x28 (México) · Doble T I 400x400x16x28 (Argentina / LATAM) · UB 400 (UK / Australia)

The I 400x400x16x28 steel profile weighs 219.1 kg/m (147.20 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 27,904 mm². Moment of inertia Ix = 83,069.065 cm⁴, Iy = 29,878.409 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	400 mm	15.75 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	16 mm	0.63 in
Flange thickness (tf)	28 mm	1.10 in
Weight	219.1 kg/m	147.20 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	27,904 mm²	43.251 in²
Moment of inertia (Ix)	83,069.06 cm⁴	1995.73 in⁴
Moment of inertia (Iy)	29,878.41 cm⁴	717.83 in⁴
Elastic section modulus (Sx)	4,153.45 cm³	253.460 in³
Elastic section modulus (Sy)	1,493.92 cm³	91.165 in³
Plastic section modulus (Zx)	4,639.74 cm³	283.136 in³
Plastic section modulus (Zy)	2,262.02 cm³	138.037 in³
Radius of gyration (rx)	17.25 cm	6.793 in
Radius of gyration (ry)	10.35 cm	4.074 in