CHS 177.8x4.5 SAISC · Weight & Dimensions

SAISC, 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 177.8x4.5 steel profile weighs 19.2 kg/m (12.92 lb/ft). Cross-sectional area: 2,449.971 mm². Moment of inertia Ix = 920.367 cm⁴, Iy = 920.367 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.5 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4.5 mm	0.18 in
Diameter (d)	177.8 mm	7.00 in
Weight	19.2 kg/m	12.92 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,449.97 mm²	3.797 in²
Moment of inertia (Ix)	920.37 cm⁴	22.11 in⁴
Moment of inertia (Iy)	920.37 cm⁴	22.11 in⁴
Elastic section modulus (Sx)	103.53 cm³	6.318 in³
Elastic section modulus (Sy)	103.53 cm³	6.318 in³
Plastic section modulus (Zx)	135.18 cm³	8.249 in³
Plastic section modulus (Zy)	135.18 cm³	8.249 in³
Radius of gyration (rx)	6.13 cm	2.413 in
Radius of gyration (ry)	6.13 cm	2.413 in