CHS 42x4.85 IMCA · Weight & Dimensions

IMCA, 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 42x4.85 steel profile weighs 4.4 kg/m (2.98 lb/ft). Cross-sectional area: 566.044 mm². Moment of inertia Ix = 9.932 cm⁴, Iy = 9.932 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.85 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4.8 mm	0.19 in
Diameter (d)	42 mm	1.65 in
Weight	4.4 kg/m	2.98 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	566.04 mm²	0.877 in²
Moment of inertia (Ix)	9.93 cm⁴	0.24 in⁴
Moment of inertia (Iy)	9.93 cm⁴	0.24 in⁴
Elastic section modulus (Sx)	4.73 cm³	0.289 in³
Elastic section modulus (Sy)	4.73 cm³	0.289 in³
Plastic section modulus (Zx)	6.73 cm³	0.411 in³
Plastic section modulus (Zy)	6.73 cm³	0.411 in³
Radius of gyration (rx)	1.32 cm	0.521 in
Radius of gyration (ry)	1.32 cm	0.521 in