RHS 178x127x7.9 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 178x127 (México) · Caño estructural 178x127 (Argentina)

The RHS 178x127x7.9 steel profile weighs 34.7 kg/m (23.35 lb/ft), has a depth of 178 mm (7.01 in), flange width 127 mm (5.00 in). Cross-sectional area: 4,408.64 mm². Moment of inertia Ix = 1,891.375 cm⁴, Iy = 1,118.123 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	178 mm	7.01 in
Width (b)	127 mm	5.00 in
Thickness (t)	7.9 mm	0.31 in
Fillet radius (r)	15.8 mm	0.62 in
Weight	34.7 kg/m	23.35 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,408.64 mm²	6.833 in²
Moment of inertia (Ix)	1,891.38 cm⁴	45.44 in⁴
Moment of inertia (Iy)	1,118.12 cm⁴	26.86 in⁴
Elastic section modulus (Sx)	212.51 cm³	12.968 in³
Elastic section modulus (Sy)	176.08 cm³	10.745 in³
Plastic section modulus (Zx)	260.52 cm³	15.898 in³
Plastic section modulus (Zy)	206.35 cm³	12.593 in³
Radius of gyration (rx)	6.55 cm	2.579 in
Radius of gyration (ry)	5.04 cm	1.983 in