CHS 30x1.55 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 30x1.55 steel profile weighs 1.1 kg/m (0.73 lb/ft). Cross-sectional area: 138.536 mm². Moment of inertia Ix = 1.406 cm⁴, Iy = 1.406 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.55 mm ≈ 16 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1.6 mm	0.06 in
Diameter (d)	30 mm	1.18 in
Weight	1.1 kg/m	0.73 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	138.54 mm²	0.215 in²
Moment of inertia (Ix)	1.41 cm⁴	0.03 in⁴
Moment of inertia (Iy)	1.41 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	0.94 cm³	0.057 in³
Elastic section modulus (Sy)	0.94 cm³	0.057 in³
Plastic section modulus (Zx)	1.26 cm³	0.077 in³
Plastic section modulus (Zy)	1.26 cm³	0.077 in³
Radius of gyration (rx)	1.01 cm	0.397 in
Radius of gyration (ry)	1.01 cm	0.397 in