CHS 33x4.55 IMCA · Weight & Dimensions

IMCA, cold-formed sections · Circular Hollow Section

Circular Hollow Sections (CHS) are round tubular profiles with the most efficient cross-section for compression. Used for columns, trusses, and architectural structures.

Also known as: Caño estructural redondo (Argentina)

The CHS 33x4.55 steel profile weighs 3.2 kg/m (2.14 lb/ft). Cross-sectional area: 406.671 mm². Moment of inertia Ix = 4.22 cm⁴, Iy = 4.22 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.55 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4.5 mm	0.18 in
Diameter (d)	33 mm	1.30 in
Weight	3.2 kg/m	2.14 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	406.67 mm²	0.630 in²
Moment of inertia (Ix)	4.22 cm⁴	0.10 in⁴
Moment of inertia (Iy)	4.22 cm⁴	0.10 in⁴
Elastic section modulus (Sx)	2.56 cm³	0.156 in³
Elastic section modulus (Sy)	2.56 cm³	0.156 in³
Plastic section modulus (Zx)	3.71 cm³	0.227 in³
Plastic section modulus (Zy)	3.71 cm³	0.227 in³
Radius of gyration (rx)	1.02 cm	0.401 in
Radius of gyration (ry)	1.02 cm	0.401 in