I 407x178x8x15.5 IAS · Weight & Dimensions

IAS, 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 407x178x8x15.5 (México) · Doble T I 407x178x8x15.5 (Argentina / LATAM) · UB 407 (UK / Australia)

The I 407x178x8x15.5 steel profile weighs 66.9 kg/m (44.98 lb/ft), has a depth of 407 mm (16.02 in), flange width 178 mm (7.01 in). Cross-sectional area: 8,526 mm². Moment of inertia Ix = 24,698.779 cm⁴, Iy = 1,458.54 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	407 mm	16.02 in
Width (b)	178 mm	7.01 in
Web thickness (tw)	8 mm	0.31 in
Flange thickness (tf)	15.5 mm	0.61 in
Weight	66.9 kg/m	44.98 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	8,526 mm²	13.215 in²
Moment of inertia (Ix)	24,698.78 cm⁴	593.39 in⁴
Moment of inertia (Iy)	1,458.54 cm⁴	35.04 in⁴
Elastic section modulus (Sx)	1,213.7 cm³	74.065 in³
Elastic section modulus (Sy)	163.88 cm³	10.001 in³
Plastic section modulus (Zx)	1,362.9 cm³	83.170 in³
Plastic section modulus (Zy)	251.57 cm³	15.352 in³
Radius of gyration (rx)	17.02 cm	6.701 in
Radius of gyration (ry)	4.14 cm	1.628 in