RHS 178x102x6.4 IMCA · Weight & Dimensions

IMCA, cold-formed sections · Rectangular Hollow Section

Rectangular Hollow Sections (RHS) are tubular profiles with excellent torsional resistance and aesthetic appeal. Used for columns, trusses, and exposed structural elements.

Also known as: PTR 178x102 cal 3 (México) · Caño estructural 178x102 (Argentina)

The RHS 178x102x6.4 steel profile weighs 25.8 kg/m (17.32 lb/ft), has a depth of 178 mm (7.01 in), flange width 102 mm (4.02 in). Cross-sectional area: 3,314.679 mm². Moment of inertia Ix = 1,361.216 cm⁴, Iy = 570.943 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	178 mm	7.01 in
Width (b)	102 mm	4.02 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	25.8 kg/m	17.32 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,314.68 mm²	5.138 in²
Moment of inertia (Ix)	1,361.22 cm⁴	32.70 in⁴
Moment of inertia (Iy)	570.94 cm⁴	13.72 in⁴
Elastic section modulus (Sx)	152.95 cm³	9.333 in³
Elastic section modulus (Sy)	111.95 cm³	6.832 in³
Plastic section modulus (Zx)	190.09 cm³	11.600 in³
Plastic section modulus (Zy)	129.12 cm³	7.879 in³
Radius of gyration (rx)	6.41 cm	2.523 in
Radius of gyration (ry)	4.15 cm	1.634 in