RHS 120x100x6.4 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 120x100 cal 3 (México) · Caño estructural 120x100 (Argentina)

The RHS 120x100x6.4 steel profile weighs 20.0 kg/m (13.43 lb/ft), has a depth of 120 mm (4.72 in), flange width 100 mm (3.94 in). Cross-sectional area: 2,546.679 mm². Moment of inertia Ix = 508.374 cm⁴, Iy = 382.594 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	120 mm	4.72 in
Width (b)	100 mm	3.94 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	20.0 kg/m	13.43 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,546.68 mm²	3.947 in²
Moment of inertia (Ix)	508.37 cm⁴	12.21 in⁴
Moment of inertia (Iy)	382.59 cm⁴	9.19 in⁴
Elastic section modulus (Sx)	84.73 cm³	5.171 in³
Elastic section modulus (Sy)	76.52 cm³	4.669 in³
Plastic section modulus (Zx)	103.28 cm³	6.302 in³
Plastic section modulus (Zy)	91.07 cm³	5.557 in³
Radius of gyration (rx)	4.47 cm	1.759 in
Radius of gyration (ry)	3.88 cm	1.526 in