RHS 70x30x3 Cintac · Weight & Dimensions

Cintac, 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 70x30 cal 11 (México) · Caño estructural 70x30 (Argentina)

The RHS 70x30x3 steel profile weighs 4.3 kg/m (2.86 lb/ft), has a depth of 70 mm (2.76 in), flange width 30 mm (1.18 in). Cross-sectional area: 540.823 mm². Moment of inertia Ix = 30.575 cm⁴, Iy = 7.896 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	70 mm	2.76 in
Width (b)	30 mm	1.18 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	4.3 kg/m	2.86 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	540.82 mm²	0.838 in²
Moment of inertia (Ix)	30.57 cm⁴	0.73 in⁴
Moment of inertia (Iy)	7.9 cm⁴	0.19 in⁴
Elastic section modulus (Sx)	8.74 cm³	0.533 in³
Elastic section modulus (Sy)	5.26 cm³	0.321 in³
Plastic section modulus (Zx)	11.38 cm³	0.694 in³
Plastic section modulus (Zy)	6.2 cm³	0.378 in³
Radius of gyration (rx)	2.38 cm	0.936 in
Radius of gyration (ry)	1.21 cm	0.476 in