RHS 100x20x2.5 Acindar · Weight & Dimensions

Acindar, 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 100x20 cal 13 (México) · Caño estructural 100x20 (Argentina)

The RHS 100x20x2.5 steel profile weighs 4.4 kg/m (2.95 lb/ft), has a depth of 100 mm (3.94 in), flange width 20 mm (0.79 in). Cross-sectional area: 558.905 mm². Moment of inertia Ix = 55.547 cm⁴, Iy = 3.85 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 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	4.4 kg/m	2.95 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	558.9 mm²	0.866 in²
Moment of inertia (Ix)	55.55 cm⁴	1.33 in⁴
Moment of inertia (Iy)	3.85 cm⁴	0.09 in⁴
Elastic section modulus (Sx)	11.11 cm³	0.678 in³
Elastic section modulus (Sy)	3.85 cm³	0.235 in³
Plastic section modulus (Zx)	15.36 cm³	0.937 in³
Plastic section modulus (Zy)	4.5 cm³	0.275 in³
Radius of gyration (rx)	3.15 cm	1.241 in
Radius of gyration (ry)	0.83 cm	0.327 in