RHS 55x15x1.2 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 55x15 cal 18 (México) · Caño estructural 55x15 (Argentina)

The RHS 55x15x1.2 steel profile weighs 1.2 kg/m (0.83 lb/ft), has a depth of 55 mm (2.17 in), flange width 15 mm (0.59 in). Cross-sectional area: 158.532 mm². Moment of inertia Ix = 5.24 cm⁴, Iy = 0.65 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	55 mm	2.17 in
Width (b)	15 mm	0.59 in
Thickness (t)	1.2 mm	0.05 in
Fillet radius (r)	2.4 mm	0.09 in
Weight	1.2 kg/m	0.83 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	158.53 mm²	0.246 in²
Moment of inertia (Ix)	5.24 cm⁴	0.13 in⁴
Moment of inertia (Iy)	0.65 cm⁴	0.02 in⁴
Elastic section modulus (Sx)	1.91 cm³	0.116 in³
Elastic section modulus (Sy)	0.87 cm³	0.053 in³
Plastic section modulus (Zx)	2.53 cm³	0.154 in³
Plastic section modulus (Zy)	0.98 cm³	0.060 in³
Radius of gyration (rx)	1.82 cm	0.716 in
Radius of gyration (ry)	0.64 cm	0.252 in