RHS 178x102x7.9 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 (México) · Caño estructural 178x102 (Argentina)

The RHS 178x102x7.9 steel profile weighs 31.6 kg/m (21.20 lb/ft), has a depth of 178 mm (7.01 in), flange width 102 mm (4.02 in). Cross-sectional area: 4,013.64 mm². Moment of inertia Ix = 1,605.447 cm⁴, Iy = 669.064 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	178 mm	7.01 in
Width (b)	102 mm	4.02 in
Thickness (t)	7.9 mm	0.31 in
Fillet radius (r)	15.8 mm	0.62 in
Weight	31.6 kg/m	21.20 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,013.64 mm²	6.221 in²
Moment of inertia (Ix)	1,605.45 cm⁴	38.57 in⁴
Moment of inertia (Iy)	669.06 cm⁴	16.07 in⁴
Elastic section modulus (Sx)	180.39 cm³	11.008 in³
Elastic section modulus (Sy)	131.19 cm³	8.006 in³
Plastic section modulus (Zx)	226.92 cm³	13.848 in³
Plastic section modulus (Zy)	153.72 cm³	9.380 in³
Radius of gyration (rx)	6.32 cm	2.490 in
Radius of gyration (ry)	4.08 cm	1.607 in