RHS 100x70x7.1 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 100x70x7.1 steel profile weighs 16.4 kg/m (10.99 lb/ft), has a depth of 100 mm (3.94 in), flange width 70 mm (2.76 in). Cross-sectional area: 2,082.543 mm². Moment of inertia Ix = 258.941 cm⁴, Iy = 146.955 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	70 mm	2.76 in
Thickness (t)	7.1 mm	0.28 in
Fillet radius (r)	14.2 mm	0.56 in
Weight	16.4 kg/m	10.99 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,082.54 mm²	3.228 in²
Moment of inertia (Ix)	258.94 cm⁴	6.22 in⁴
Moment of inertia (Iy)	146.96 cm⁴	3.53 in⁴
Elastic section modulus (Sx)	51.79 cm³	3.160 in³
Elastic section modulus (Sy)	41.99 cm³	2.562 in³
Plastic section modulus (Zx)	65.99 cm³	4.027 in³
Plastic section modulus (Zy)	51.34 cm³	3.133 in³
Radius of gyration (rx)	3.53 cm	1.388 in
Radius of gyration (ry)	2.66 cm	1.046 in