RHS 40x20x2.5 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 40x20 cal 13 (México) · Caño estructural 40x20 (Argentina)

The RHS 40x20x2.5 steel profile weighs 2.0 kg/m (1.36 lb/ft), has a depth of 40 mm (1.57 in), flange width 20 mm (0.79 in). Cross-sectional area: 258.905 mm². Moment of inertia Ix = 4.694 cm⁴, Iy = 1.537 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 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	2.0 kg/m	1.36 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	258.9 mm²	0.401 in²
Moment of inertia (Ix)	4.69 cm⁴	0.11 in⁴
Moment of inertia (Iy)	1.54 cm⁴	0.04 in⁴
Elastic section modulus (Sx)	2.35 cm³	0.143 in³
Elastic section modulus (Sy)	1.54 cm³	0.094 in³
Plastic section modulus (Zx)	3.09 cm³	0.189 in³
Plastic section modulus (Zy)	1.88 cm³	0.115 in³
Radius of gyration (rx)	1.35 cm	0.530 in
Radius of gyration (ry)	0.77 cm	0.303 in