RHS 100x40x3.2 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 100x40 cal 11 (México) · Caño estructural 100x40 (Argentina)

The RHS 100x40x3.2 steel profile weighs 6.5 kg/m (4.37 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 828.67 mm². Moment of inertia Ix = 97.294 cm⁴, Iy = 22.756 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.2 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	40 mm	1.57 in
Thickness (t)	3.2 mm	0.13 in
Fillet radius (r)	6.4 mm	0.25 in
Weight	6.5 kg/m	4.37 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	828.67 mm²	1.284 in²
Moment of inertia (Ix)	97.29 cm⁴	2.34 in⁴
Moment of inertia (Iy)	22.76 cm⁴	0.55 in⁴
Elastic section modulus (Sx)	19.46 cm³	1.187 in³
Elastic section modulus (Sy)	11.38 cm³	0.694 in³
Plastic section modulus (Zx)	25.11 cm³	1.532 in³
Plastic section modulus (Zy)	13.07 cm³	0.798 in³
Radius of gyration (rx)	3.43 cm	1.349 in
Radius of gyration (ry)	1.66 cm	0.652 in