RHS 100x80x3.6 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 100x80 (México) · Caño estructural 100x80 (Argentina)

The RHS 100x80x3.6 steel profile weighs 9.5 kg/m (6.38 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,210.785 mm². Moment of inertia Ix = 173.716 cm⁴, Iy = 123.136 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)	80 mm	3.15 in
Thickness (t)	3.6 mm	0.14 in
Fillet radius (r)	7.2 mm	0.28 in
Weight	9.5 kg/m	6.38 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,210.79 mm²	1.877 in²
Moment of inertia (Ix)	173.72 cm⁴	4.17 in⁴
Moment of inertia (Iy)	123.14 cm⁴	2.96 in⁴
Elastic section modulus (Sx)	34.74 cm³	2.120 in³
Elastic section modulus (Sy)	30.78 cm³	1.879 in³
Plastic section modulus (Zx)	41.62 cm³	2.540 in³
Plastic section modulus (Zy)	35.73 cm³	2.180 in³
Radius of gyration (rx)	3.79 cm	1.491 in
Radius of gyration (ry)	3.19 cm	1.256 in