RHS 80x50x3 · Weight & Dimensions

BR — 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 80x50 cal 11 (México) · Caño estructural 80x50 (Argentina)

The RHS 80x50x3 steel profile weighs 5.7 kg/m (3.80 lb/ft), has a depth of 80 mm (3.15 in), flange width 50 mm (1.97 in). Cross-sectional area: 744 mm². Moment of inertia Ix = 64.75 cm⁴, Iy = 30.8 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	50 mm	1.97 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	5.7 kg/m	3.80 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	744 mm²	1.153 in²
Moment of inertia (Ix)	64.75 cm⁴	1.56 in⁴
Moment of inertia (Iy)	30.8 cm⁴	0.74 in⁴
Elastic section modulus (Sx)	16.19 cm³	0.988 in³
Elastic section modulus (Sy)	12.32 cm³	0.752 in³
Plastic section modulus (Zx)	19.76 cm³	1.206 in³
Plastic section modulus (Zy)	14.18 cm³	0.865 in³
Radius of gyration (rx)	2.95 cm	1.161 in
Radius of gyration (ry)	2.03 cm	0.799 in