RHS 100x40x3.6 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 (México) · Caño estructural 100x40 (Argentina)

The RHS 100x40x3.6 steel profile weighs 7.2 kg/m (4.87 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 922.785 mm². Moment of inertia Ix = 106.776 cm⁴, Iy = 24.802 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.6 mm ≈ 9 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	40 mm	1.57 in
Thickness (t)	3.6 mm	0.14 in
Fillet radius (r)	7.2 mm	0.28 in
Weight	7.2 kg/m	4.87 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	922.79 mm²	1.430 in²
Moment of inertia (Ix)	106.78 cm⁴	2.57 in⁴
Moment of inertia (Iy)	24.8 cm⁴	0.60 in⁴
Elastic section modulus (Sx)	21.36 cm³	1.303 in³
Elastic section modulus (Sy)	12.4 cm³	0.757 in³
Plastic section modulus (Zx)	27.74 cm³	1.693 in³
Plastic section modulus (Zy)	14.4 cm³	0.878 in³
Radius of gyration (rx)	3.4 cm	1.339 in
Radius of gyration (ry)	1.64 cm	0.645 in