CHS 273x18 GOST · Weight & Dimensions

GOST, 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 273x18 steel profile weighs 113.2 kg/m (76.07 lb/ft). Cross-sectional area: 14,419.91 mm². Moment of inertia Ix = 11,779.084 cm⁴, Iy = 11,779.084 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	18 mm	0.71 in
Diameter (d)	273 mm	10.75 in
Weight	113.2 kg/m	76.07 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	14,419.91 mm²	22.351 in²
Moment of inertia (Ix)	11,779.08 cm⁴	282.99 in⁴
Moment of inertia (Iy)	11,779.08 cm⁴	282.99 in⁴
Elastic section modulus (Sx)	862.94 cm³	52.660 in³
Elastic section modulus (Sy)	862.94 cm³	52.660 in³
Plastic section modulus (Zx)	1,172.39 cm³	71.544 in³
Plastic section modulus (Zy)	1,172.39 cm³	71.544 in³
Radius of gyration (rx)	9.04 cm	3.558 in
Radius of gyration (ry)	9.04 cm	3.558 in