RHS 45x20x2.5 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 13 (México) · Caño estructural 45x20 (Argentina)

The RHS 45x20x2.5 steel profile weighs 2.2 kg/m (1.50 lb/ft), has a depth of 45 mm (1.77 in), flange width 20 mm (0.79 in). Cross-sectional area: 283.905 mm². Moment of inertia Ix = 6.407 cm⁴, Iy = 1.73 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 2.5 mm ≈ 12 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	45 mm	1.77 in
Width (b)	20 mm	0.79 in
Thickness (t)	2.5 mm	0.10 in
Fillet radius (r)	5 mm	0.20 in
Weight	2.2 kg/m	1.50 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	283.9 mm²	0.440 in²
Moment of inertia (Ix)	6.41 cm⁴	0.15 in⁴
Moment of inertia (Iy)	1.73 cm⁴	0.04 in⁴
Elastic section modulus (Sx)	2.85 cm³	0.174 in³
Elastic section modulus (Sy)	1.73 cm³	0.106 in³
Plastic section modulus (Zx)	3.77 cm³	0.230 in³
Plastic section modulus (Zy)	2.1 cm³	0.128 in³
Radius of gyration (rx)	1.5 cm	0.591 in
Radius of gyration (ry)	0.78 cm	0.307 in