CHS 168.3x7.9 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 168.3x7.9 steel profile weighs 31.3 kg/m (21.00 lb/ft). Cross-sectional area: 3,980.901 mm². Moment of inertia Ix = 1,283.371 cm⁴, Iy = 1,283.371 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	7.9 mm	0.31 in
Diameter (d)	168.3 mm	6.63 in
Weight	31.3 kg/m	21.00 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,980.9 mm²	6.170 in²
Moment of inertia (Ix)	1,283.37 cm⁴	30.83 in⁴
Moment of inertia (Iy)	1,283.37 cm⁴	30.83 in⁴
Elastic section modulus (Sx)	152.51 cm³	9.307 in³
Elastic section modulus (Sy)	152.51 cm³	9.307 in³
Plastic section modulus (Zx)	203.42 cm³	12.413 in³
Plastic section modulus (Zy)	203.42 cm³	12.413 in³
Radius of gyration (rx)	5.68 cm	2.235 in
Radius of gyration (ry)	5.68 cm	2.235 in