CHS 33.4x6.4 Açotubo · Weight & Dimensions

Açotubo, 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 33.4x6.4 steel profile weighs 4.3 kg/m (2.86 lb/ft). Cross-sectional area: 542.867 mm². Moment of inertia Ix = 5.225 cm⁴, Iy = 5.225 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	6.4 mm	0.25 in
Diameter (d)	33.4 mm	1.31 in
Weight	4.3 kg/m	2.86 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	542.87 mm²	0.841 in²
Moment of inertia (Ix)	5.22 cm⁴	0.13 in⁴
Moment of inertia (Iy)	5.22 cm⁴	0.13 in⁴
Elastic section modulus (Sx)	3.13 cm³	0.191 in³
Elastic section modulus (Sy)	3.13 cm³	0.191 in³
Plastic section modulus (Zx)	4.75 cm³	0.290 in³
Plastic section modulus (Zy)	4.75 cm³	0.290 in³
Radius of gyration (rx)	0.98 cm	0.386 in
Radius of gyration (ry)	0.98 cm	0.386 in