CS 450x321 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 450x321 (México) · Doble T CS 450x321 (Argentina / LATAM) · UB 450 (UK / Australia)

The CS 450x321 steel profile weighs 320.9 kg/m (215.65 lb/ft), has a depth of 450 mm (17.72 in), flange width 450 mm (17.72 in). Cross-sectional area: 40,875 mm². Moment of inertia Ix = 152,314.453 cm⁴, Iy = 56,974.559 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	450 mm	17.72 in
Width (b)	450 mm	17.72 in
Web thickness (tw)	19 mm	0.75 in
Flange thickness (tf)	37.5 mm	1.48 in
Weight	320.9 kg/m	215.65 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	40,875 mm²	63.356 in²
Moment of inertia (Ix)	152,314.45 cm⁴	3659.35 in⁴
Moment of inertia (Iy)	56,974.56 cm⁴	1368.81 in⁴
Elastic section modulus (Sx)	6,769.53 cm³	413.104 in³
Elastic section modulus (Sy)	2,532.2 cm³	154.525 in³
Plastic section modulus (Zx)	7,628.91 cm³	465.546 in³
Plastic section modulus (Zy)	3,830.72 cm³	233.766 in³
Radius of gyration (rx)	19.3 cm	7.600 in
Radius of gyration (ry)	11.81 cm	4.648 in