RHS 70x50x6.4 Açotubo · Weight & Dimensions

Açotubo, 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 70x50 cal 3 (México) · Caño estructural 70x50 (Argentina)

The RHS 70x50x6.4 steel profile weighs 9.9 kg/m (6.68 lb/ft), has a depth of 70 mm (2.76 in), flange width 50 mm (1.97 in). Cross-sectional area: 1,266.679 mm². Moment of inertia Ix = 72.891 cm⁴, Iy = 42.445 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	70 mm	2.76 in
Width (b)	50 mm	1.97 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	9.9 kg/m	6.68 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,266.68 mm²	1.963 in²
Moment of inertia (Ix)	72.89 cm⁴	1.75 in⁴
Moment of inertia (Iy)	42.44 cm⁴	1.02 in⁴
Elastic section modulus (Sx)	20.83 cm³	1.271 in³
Elastic section modulus (Sy)	16.98 cm³	1.036 in³
Plastic section modulus (Zx)	27.26 cm³	1.663 in³
Plastic section modulus (Zy)	21.45 cm³	1.309 in³
Radius of gyration (rx)	2.4 cm	0.944 in
Radius of gyration (ry)	1.83 cm	0.721 in