RHS 45x20x1.5 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 45x20 cal 16 (México) · Caño estructural 45x20 (Argentina)

The RHS 45x20x1.5 steel profile weighs 1.4 kg/m (0.95 lb/ft), has a depth of 45 mm (1.77 in), flange width 20 mm (0.79 in). Cross-sectional area: 180.206 mm². Moment of inertia Ix = 4.406 cm⁴, Iy = 1.226 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.5 mm ≈ 16 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	45 mm	1.77 in
Width (b)	20 mm	0.79 in
Thickness (t)	1.5 mm	0.06 in
Fillet radius (r)	3 mm	0.12 in
Weight	1.4 kg/m	0.95 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	180.21 mm²	0.279 in²
Moment of inertia (Ix)	4.41 cm⁴	0.11 in⁴
Moment of inertia (Iy)	1.23 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	1.96 cm³	0.119 in³
Elastic section modulus (Sy)	1.23 cm³	0.075 in³
Plastic section modulus (Zx)	2.5 cm³	0.153 in³
Plastic section modulus (Zy)	1.41 cm³	0.086 in³
Radius of gyration (rx)	1.56 cm	0.616 in
Radius of gyration (ry)	0.82 cm	0.325 in