RHS 100x80x3.5 Hiasa · Weight & Dimensions

Hiasa, 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 11 (México) · Caño estructural 100x80 (Argentina)

The RHS 100x80x3.5 steel profile weighs 9.3 kg/m (6.22 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,179.454 mm². Moment of inertia Ix = 169.672 cm⁴, Iy = 120.299 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.5 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	80 mm	3.15 in
Thickness (t)	3.5 mm	0.14 in
Fillet radius (r)	7 mm	0.28 in
Weight	9.3 kg/m	6.22 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,179.45 mm²	1.828 in²
Moment of inertia (Ix)	169.67 cm⁴	4.08 in⁴
Moment of inertia (Iy)	120.3 cm⁴	2.89 in⁴
Elastic section modulus (Sx)	33.93 cm³	2.071 in³
Elastic section modulus (Sy)	30.07 cm³	1.835 in³
Plastic section modulus (Zx)	40.6 cm³	2.478 in³
Plastic section modulus (Zy)	34.86 cm³	2.127 in³
Radius of gyration (rx)	3.79 cm	1.493 in
Radius of gyration (ry)	3.19 cm	1.257 in