CHS 36.1x3 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 36.1x3 steel profile weighs 2.5 kg/m (1.65 lb/ft). Cross-sectional area: 311.96 mm². Moment of inertia Ix = 4.307 cm⁴, Iy = 4.307 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	3 mm	0.12 in
Diameter (d)	36.1 mm	1.42 in
Weight	2.5 kg/m	1.65 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	311.96 mm²	0.484 in²
Moment of inertia (Ix)	4.31 cm⁴	0.10 in⁴
Moment of inertia (Iy)	4.31 cm⁴	0.10 in⁴
Elastic section modulus (Sx)	2.39 cm³	0.146 in³
Elastic section modulus (Sy)	2.39 cm³	0.146 in³
Plastic section modulus (Zx)	3.3 cm³	0.201 in³
Plastic section modulus (Zy)	3.3 cm³	0.201 in³
Radius of gyration (rx)	1.18 cm	0.463 in
Radius of gyration (ry)	1.18 cm	0.463 in