CHS 33.4x3.18 CISC · Weight & Dimensions

CISC, 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 33.4x3.18 steel profile weighs 2.4 kg/m (1.59 lb/ft). Cross-sectional area: 301.906 mm². Moment of inertia Ix = 3.485 cm⁴, Iy = 3.485 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.18 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	3.2 mm	0.13 in
Diameter (d)	33.4 mm	1.31 in
Weight	2.4 kg/m	1.59 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	301.91 mm²	0.468 in²
Moment of inertia (Ix)	3.48 cm⁴	0.08 in⁴
Moment of inertia (Iy)	3.48 cm⁴	0.08 in⁴
Elastic section modulus (Sx)	2.09 cm³	0.127 in³
Elastic section modulus (Sy)	2.09 cm³	0.127 in³
Plastic section modulus (Zx)	2.91 cm³	0.178 in³
Plastic section modulus (Zy)	2.91 cm³	0.178 in³
Radius of gyration (rx)	1.07 cm	0.423 in
Radius of gyration (ry)	1.07 cm	0.423 in