CS 400x165 Usiminas · Weight & Dimensions

Usiminas, 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: CS 400x165 (México) · Doble T CS 400x165 (Argentina / LATAM) · UB 400 (UK / Australia)

The CS 400x165 steel profile weighs 164.8 kg/m (110.73 lb/ft), has a depth of 400 mm (15.75 in), flange width 400 mm (15.75 in). Cross-sectional area: 20,992 mm². Moment of inertia Ix = 61,531.964 cm⁴, Iy = 20,279.023 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)	19 mm	0.75 in
Weight	164.8 kg/m	110.73 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	20,992 mm²	32.538 in²
Moment of inertia (Ix)	61,531.96 cm⁴	1478.31 in⁴
Moment of inertia (Iy)	20,279.02 cm⁴	487.20 in⁴
Elastic section modulus (Sx)	3,076.6 cm³	187.746 in³
Elastic section modulus (Sy)	1,013.95 cm³	61.875 in³
Plastic section modulus (Zx)	3,419.78 cm³	208.688 in³
Plastic section modulus (Zy)	1,543.17 cm³	94.170 in³
Radius of gyration (rx)	17.12 cm	6.740 in
Radius of gyration (ry)	9.83 cm	3.870 in