RHS 100x70x4.4 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 (México) · Caño estructural 100x70 (Argentina)

The RHS 100x70x4.4 steel profile weighs 10.7 kg/m (7.22 lb/ft), has a depth of 100 mm (3.94 in), flange width 70 mm (2.76 in). Cross-sectional area: 1,368.704 mm². Moment of inertia Ix = 184.426 cm⁴, Iy = 105.812 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.4 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	70 mm	2.76 in
Thickness (t)	4.4 mm	0.17 in
Fillet radius (r)	8.8 mm	0.35 in
Weight	10.7 kg/m	7.22 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,368.7 mm²	2.121 in²
Moment of inertia (Ix)	184.43 cm⁴	4.43 in⁴
Moment of inertia (Iy)	105.81 cm⁴	2.54 in⁴
Elastic section modulus (Sx)	36.89 cm³	2.251 in³
Elastic section modulus (Sy)	30.23 cm³	1.845 in³
Plastic section modulus (Zx)	45.29 cm³	2.764 in³
Plastic section modulus (Zy)	35.4 cm³	2.160 in³
Radius of gyration (rx)	3.67 cm	1.445 in
Radius of gyration (ry)	2.78 cm	1.095 in