RHS 80x20x1.5 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 80x20 cal 16 (México) · Caño estructural 80x20 (Argentina)

The RHS 80x20x1.5 steel profile weighs 2.2 kg/m (1.51 lb/ft), has a depth of 80 mm (3.15 in), flange width 20 mm (0.79 in). Cross-sectional area: 285.206 mm². Moment of inertia Ix = 19.744 cm⁴, Iy = 2.126 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 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	2.2 kg/m	1.51 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	285.21 mm²	0.442 in²
Moment of inertia (Ix)	19.74 cm⁴	0.47 in⁴
Moment of inertia (Iy)	2.13 cm⁴	0.05 in⁴
Elastic section modulus (Sx)	4.94 cm³	0.301 in³
Elastic section modulus (Sy)	2.13 cm³	0.130 in³
Plastic section modulus (Zx)	6.57 cm³	0.401 in³
Plastic section modulus (Zy)	2.38 cm³	0.145 in³
Radius of gyration (rx)	2.63 cm	1.036 in
Radius of gyration (ry)	0.86 cm	0.340 in