RHS 178x127x4.8 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 178x127 cal 6 (México) · Caño estructural 178x127 (Argentina)

The RHS 178x127x4.8 steel profile weighs 21.6 kg/m (14.54 lb/ft), has a depth of 178 mm (7.01 in), flange width 127 mm (5.00 in). Cross-sectional area: 2,776.507 mm². Moment of inertia Ix = 1,250.589 cm⁴, Iy = 744.469 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)	127 mm	5.00 in
Thickness (t)	4.8 mm	0.19 in
Fillet radius (r)	9.6 mm	0.38 in
Weight	21.6 kg/m	14.54 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,776.51 mm²	4.304 in²
Moment of inertia (Ix)	1,250.59 cm⁴	30.05 in⁴
Moment of inertia (Iy)	744.47 cm⁴	17.89 in⁴
Elastic section modulus (Sx)	140.52 cm³	8.575 in³
Elastic section modulus (Sy)	117.24 cm³	7.154 in³
Plastic section modulus (Zx)	168.42 cm³	10.277 in³
Plastic section modulus (Zy)	133.77 cm³	8.163 in³
Radius of gyration (rx)	6.71 cm	2.642 in
Radius of gyration (ry)	5.18 cm	2.039 in