CHS 30x0.9 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 30x0.9 steel profile weighs 0.7 kg/m (0.44 lb/ft). Cross-sectional area: 82.278 mm². Moment of inertia Ix = 0.872 cm⁴, Iy = 0.872 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 0.9 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	0.9 mm	0.04 in
Diameter (d)	30 mm	1.18 in
Weight	0.7 kg/m	0.44 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	82.28 mm²	0.128 in²
Moment of inertia (Ix)	0.87 cm⁴	0.02 in⁴
Moment of inertia (Iy)	0.87 cm⁴	0.02 in⁴
Elastic section modulus (Sx)	0.58 cm³	0.035 in³
Elastic section modulus (Sy)	0.58 cm³	0.035 in³
Plastic section modulus (Zx)	0.76 cm³	0.047 in³
Plastic section modulus (Zy)	0.76 cm³	0.047 in³
Radius of gyration (rx)	1.03 cm	0.405 in
Radius of gyration (ry)	1.03 cm	0.405 in