RHS 178x102x4.8 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 6 (México) · Caño estructural 178x102 (Argentina)

The RHS 178x102x4.8 steel profile weighs 19.7 kg/m (13.24 lb/ft), has a depth of 178 mm (7.01 in), flange width 102 mm (4.02 in). Cross-sectional area: 2,536.507 mm². Moment of inertia Ix = 1,070.554 cm⁴, Iy = 452.172 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.8 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	178 mm	7.01 in
Width (b)	102 mm	4.02 in
Thickness (t)	4.8 mm	0.19 in
Fillet radius (r)	9.6 mm	0.38 in
Weight	19.7 kg/m	13.24 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,536.51 mm²	3.932 in²
Moment of inertia (Ix)	1,070.55 cm⁴	25.72 in⁴
Moment of inertia (Iy)	452.17 cm⁴	10.86 in⁴
Elastic section modulus (Sx)	120.29 cm³	7.340 in³
Elastic section modulus (Sy)	88.66 cm³	5.410 in³
Plastic section modulus (Zx)	147.63 cm³	9.009 in³
Plastic section modulus (Zy)	100.57 cm³	6.137 in³
Radius of gyration (rx)	6.5 cm	2.558 in
Radius of gyration (ry)	4.22 cm	1.662 in