RHS 100x80x4.4 Açotubo · Weight & Dimensions

Açotubo, 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 100x80x4.4 steel profile weighs 11.4 kg/m (7.69 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,456.704 mm². Moment of inertia Ix = 204.547 cm⁴, Iy = 144.707 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.4 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	80 mm	3.15 in
Thickness (t)	4.4 mm	0.17 in
Fillet radius (r)	8.8 mm	0.35 in
Weight	11.4 kg/m	7.69 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,456.7 mm²	2.258 in²
Moment of inertia (Ix)	204.55 cm⁴	4.91 in⁴
Moment of inertia (Iy)	144.71 cm⁴	3.48 in⁴
Elastic section modulus (Sx)	40.91 cm³	2.496 in³
Elastic section modulus (Sy)	36.18 cm³	2.208 in³
Plastic section modulus (Zx)	49.5 cm³	3.021 in³
Plastic section modulus (Zy)	42.46 cm³	2.591 in³
Radius of gyration (rx)	3.75 cm	1.475 in
Radius of gyration (ry)	3.15 cm	1.241 in