RHS 45x20x1.2 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 45x20 cal 18 (México) · Caño estructural 45x20 (Argentina)

The RHS 45x20x1.2 steel profile weighs 1.1 kg/m (0.77 lb/ft), has a depth of 45 mm (1.77 in), flange width 20 mm (0.79 in). Cross-sectional area: 146.532 mm². Moment of inertia Ix = 3.665 cm⁴, Iy = 1.029 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.2 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	45 mm	1.77 in
Width (b)	20 mm	0.79 in
Thickness (t)	1.2 mm	0.05 in
Fillet radius (r)	2.4 mm	0.09 in
Weight	1.1 kg/m	0.77 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	146.53 mm²	0.227 in²
Moment of inertia (Ix)	3.66 cm⁴	0.09 in⁴
Moment of inertia (Iy)	1.03 cm⁴	0.02 in⁴
Elastic section modulus (Sx)	1.63 cm³	0.099 in³
Elastic section modulus (Sy)	1.03 cm³	0.063 in³
Plastic section modulus (Zx)	2.06 cm³	0.126 in³
Plastic section modulus (Zy)	1.16 cm³	0.071 in³
Radius of gyration (rx)	1.58 cm	0.623 in
Radius of gyration (ry)	0.84 cm	0.330 in