RHS 70x30x3.5 Hiasa · Weight & Dimensions

Hiasa, 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 70x30x3.5 steel profile weighs 4.9 kg/m (3.27 lb/ft), has a depth of 70 mm (2.76 in), flange width 30 mm (1.18 in). Cross-sectional area: 619.454 mm². Moment of inertia Ix = 34.107 cm⁴, Iy = 8.717 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.5 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	70 mm	2.76 in
Width (b)	30 mm	1.18 in
Thickness (t)	3.5 mm	0.14 in
Fillet radius (r)	7 mm	0.28 in
Weight	4.9 kg/m	3.27 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	619.45 mm²	0.960 in²
Moment of inertia (Ix)	34.11 cm⁴	0.82 in⁴
Moment of inertia (Iy)	8.72 cm⁴	0.21 in⁴
Elastic section modulus (Sx)	9.74 cm³	0.595 in³
Elastic section modulus (Sy)	5.81 cm³	0.355 in³
Plastic section modulus (Zx)	12.84 cm³	0.784 in³
Plastic section modulus (Zy)	6.97 cm³	0.425 in³
Radius of gyration (rx)	2.35 cm	0.924 in
Radius of gyration (ry)	1.19 cm	0.467 in