CHS 31.8x1 Cimagbo · Weight & Dimensions

Cimagbo, 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 31.8x1 steel profile weighs 0.8 kg/m (0.51 lb/ft). Cross-sectional area: 96.761 mm². Moment of inertia Ix = 1.149 cm⁴, Iy = 1.149 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1 mm	0.04 in
Diameter (d)	31.8 mm	1.25 in
Weight	0.8 kg/m	0.51 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	96.76 mm²	0.150 in²
Moment of inertia (Ix)	1.15 cm⁴	0.03 in⁴
Moment of inertia (Iy)	1.15 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	0.72 cm³	0.044 in³
Elastic section modulus (Sy)	0.72 cm³	0.044 in³
Plastic section modulus (Zx)	0.95 cm³	0.058 in³
Plastic section modulus (Zy)	0.95 cm³	0.058 in³
Radius of gyration (rx)	1.09 cm	0.429 in
Radius of gyration (ry)	1.09 cm	0.429 in