CHS 31.75x1.25 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 31.75x1.25 steel profile weighs 0.9 kg/m (0.63 lb/ft). Cross-sectional area: 119.773 mm². Moment of inertia Ix = 1.395 cm⁴, Iy = 1.395 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.25 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1.3 mm	0.05 in
Diameter (d)	31.8 mm	1.25 in
Weight	0.9 kg/m	0.63 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	119.77 mm²	0.186 in²
Moment of inertia (Ix)	1.4 cm⁴	0.03 in⁴
Moment of inertia (Iy)	1.4 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	0.88 cm³	0.054 in³
Elastic section modulus (Sy)	0.88 cm³	0.054 in³
Plastic section modulus (Zx)	1.16 cm³	0.071 in³
Plastic section modulus (Zy)	1.16 cm³	0.071 in³
Radius of gyration (rx)	1.08 cm	0.425 in
Radius of gyration (ry)	1.08 cm	0.425 in