RHS 100x70x5.6 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 (México) · Caño estructural 100x70 (Argentina)

The RHS 100x70x5.6 steel profile weighs 13.3 kg/m (8.96 lb/ft), has a depth of 100 mm (3.94 in), flange width 70 mm (2.76 in). Cross-sectional area: 1,697.801 mm². Moment of inertia Ix = 220.896 cm⁴, Iy = 126.109 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 5.6 mm ≈ 4 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	70 mm	2.76 in
Thickness (t)	5.6 mm	0.22 in
Fillet radius (r)	11.2 mm	0.44 in
Weight	13.3 kg/m	8.96 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,697.8 mm²	2.632 in²
Moment of inertia (Ix)	220.9 cm⁴	5.31 in⁴
Moment of inertia (Iy)	126.11 cm⁴	3.03 in⁴
Elastic section modulus (Sx)	44.18 cm³	2.696 in³
Elastic section modulus (Sy)	36.03 cm³	2.199 in³
Plastic section modulus (Zx)	55.13 cm³	3.364 in³
Plastic section modulus (Zy)	43 cm³	2.624 in³
Radius of gyration (rx)	3.61 cm	1.420 in
Radius of gyration (ry)	2.73 cm	1.073 in