RHS 100x80x4 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 cal 8 (México) · Caño estructural 100x80 (Argentina)

The RHS 100x80x4 steel profile weighs 10.5 kg/m (7.04 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,334.796 mm². Moment of inertia Ix = 189.466 cm⁴, Iy = 134.169 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	80 mm	3.15 in
Thickness (t)	4 mm	0.16 in
Fillet radius (r)	8 mm	0.31 in
Weight	10.5 kg/m	7.04 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,334.8 mm²	2.069 in²
Moment of inertia (Ix)	189.47 cm⁴	4.55 in⁴
Moment of inertia (Iy)	134.17 cm⁴	3.22 in⁴
Elastic section modulus (Sx)	37.89 cm³	2.312 in³
Elastic section modulus (Sy)	33.54 cm³	2.047 in³
Plastic section modulus (Zx)	45.62 cm³	2.784 in³
Plastic section modulus (Zy)	39.15 cm³	2.389 in³
Radius of gyration (rx)	3.77 cm	1.483 in
Radius of gyration (ry)	3.17 cm	1.248 in