CHS 177.8x3.5 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 177.8x3.5 steel profile weighs 15.1 kg/m (10.11 lb/ft). Cross-sectional area: 1,916.529 mm². Moment of inertia Ix = 728.107 cm⁴, Iy = 728.107 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.5 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	3.5 mm	0.14 in
Diameter (d)	177.8 mm	7.00 in
Weight	15.1 kg/m	10.11 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,916.53 mm²	2.971 in²
Moment of inertia (Ix)	728.11 cm⁴	17.49 in⁴
Moment of inertia (Iy)	728.11 cm⁴	17.49 in⁴
Elastic section modulus (Sx)	81.9 cm³	4.998 in³
Elastic section modulus (Sy)	81.9 cm³	4.998 in³
Plastic section modulus (Zx)	106.35 cm³	6.490 in³
Plastic section modulus (Zy)	106.35 cm³	6.490 in³
Radius of gyration (rx)	6.16 cm	2.427 in
Radius of gyration (ry)	6.16 cm	2.427 in