RHS 55x15x1 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 steel profile weighs 1.1 kg/m (0.71 lb/ft), has a depth of 55 mm (2.17 in), flange width 15 mm (0.59 in). Cross-sectional area: 133.425 mm². Moment of inertia Ix = 4.476 cm⁴, Iy = 0.563 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1 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 mm	0.04 in
Fillet radius (r)	2 mm	0.08 in
Weight	1.1 kg/m	0.71 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	133.42 mm²	0.207 in²
Moment of inertia (Ix)	4.48 cm⁴	0.11 in⁴
Moment of inertia (Iy)	0.56 cm⁴	0.01 in⁴
Elastic section modulus (Sx)	1.63 cm³	0.099 in³
Elastic section modulus (Sy)	0.75 cm³	0.046 in³
Plastic section modulus (Zx)	2.14 cm³	0.131 in³
Plastic section modulus (Zy)	0.84 cm³	0.051 in³
Radius of gyration (rx)	1.83 cm	0.721 in
Radius of gyration (ry)	0.65 cm	0.256 in