RHS 100x70x6.4 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 100x70 cal 3 (México) · Caño estructural 100x70 (Argentina)

The RHS 100x70x6.4 steel profile weighs 15.0 kg/m (10.06 lb/ft), has a depth of 100 mm (3.94 in), flange width 70 mm (2.76 in). Cross-sectional area: 1,906.679 mm². Moment of inertia Ix = 242.2 cm⁴, Iy = 137.829 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	70 mm	2.76 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	15.0 kg/m	10.06 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,906.68 mm²	2.955 in²
Moment of inertia (Ix)	242.2 cm⁴	5.82 in⁴
Moment of inertia (Iy)	137.83 cm⁴	3.31 in⁴
Elastic section modulus (Sx)	48.44 cm³	2.956 in³
Elastic section modulus (Sy)	39.38 cm³	2.403 in³
Plastic section modulus (Zx)	61.12 cm³	3.730 in³
Plastic section modulus (Zy)	47.61 cm³	2.905 in³
Radius of gyration (rx)	3.56 cm	1.403 in
Radius of gyration (ry)	2.69 cm	1.059 in