RHS 178x76x6.4 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 178x76 cal 3 (México) · Caño estructural 178x76 (Argentina)

The RHS 178x76x6.4 steel profile weighs 23.2 kg/m (15.62 lb/ft), has a depth of 178 mm (7.01 in), flange width 76 mm (2.99 in). Cross-sectional area: 2,981.879 mm². Moment of inertia Ix = 1,116.107 cm⁴, Iy = 289.385 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)	76 mm	2.99 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	23.2 kg/m	15.62 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,981.88 mm²	4.622 in²
Moment of inertia (Ix)	1,116.11 cm⁴	26.81 in⁴
Moment of inertia (Iy)	289.38 cm⁴	6.95 in⁴
Elastic section modulus (Sx)	125.41 cm³	7.653 in³
Elastic section modulus (Sy)	76.15 cm³	4.647 in³
Plastic section modulus (Zx)	161.54 cm³	9.858 in³
Plastic section modulus (Zy)	88.19 cm³	5.382 in³
Radius of gyration (rx)	6.12 cm	2.409 in
Radius of gyration (ry)	3.12 cm	1.226 in