RHS 40x20x1 Cintac · Weight & Dimensions

Cintac, 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 18 (México) · Caño estructural 40x20 (Argentina)

The RHS 40x20x1 steel profile weighs 0.9 kg/m (0.60 lb/ft), has a depth of 40 mm (1.57 in), flange width 20 mm (0.79 in). Cross-sectional area: 113.425 mm². Moment of inertia Ix = 2.335 cm⁴, Iy = 0.795 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 in
Width (b)	20 mm	0.79 in
Thickness (t)	1 mm	0.04 in
Fillet radius (r)	2 mm	0.08 in
Weight	0.9 kg/m	0.60 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	113.42 mm²	0.176 in²
Moment of inertia (Ix)	2.33 cm⁴	0.06 in⁴
Moment of inertia (Iy)	0.8 cm⁴	0.02 in⁴
Elastic section modulus (Sx)	1.17 cm³	0.071 in³
Elastic section modulus (Sy)	0.8 cm³	0.049 in³
Plastic section modulus (Zx)	1.45 cm³	0.089 in³
Plastic section modulus (Zy)	0.9 cm³	0.055 in³
Radius of gyration (rx)	1.43 cm	0.565 in
Radius of gyration (ry)	0.84 cm	0.330 in