CHS 31.75x1.9 Gerdau · Weight & Dimensions

Gerdau, tubes · 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 31.75x1.9 steel profile weighs 1.4 kg/m (0.94 lb/ft). Cross-sectional area: 178.175 mm². Moment of inertia Ix = 1.993 cm⁴, Iy = 1.993 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.9 mm ≈ 14 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1.9 mm	0.07 in
Diameter (d)	31.8 mm	1.25 in
Weight	1.4 kg/m	0.94 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	178.18 mm²	0.276 in²
Moment of inertia (Ix)	1.99 cm⁴	0.05 in⁴
Moment of inertia (Iy)	1.99 cm⁴	0.05 in⁴
Elastic section modulus (Sx)	1.26 cm³	0.077 in³
Elastic section modulus (Sy)	1.26 cm³	0.077 in³
Plastic section modulus (Zx)	1.7 cm³	0.103 in³
Plastic section modulus (Zy)	1.7 cm³	0.103 in³
Radius of gyration (rx)	1.06 cm	0.416 in
Radius of gyration (ry)	1.06 cm	0.416 in