RHS 100x80x2.5 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 13 (México) · Caño estructural 100x80 (Argentina)

The RHS 100x80x2.5 steel profile weighs 6.7 kg/m (4.53 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 858.905 mm². Moment of inertia Ix = 126.86 cm⁴, Iy = 90.168 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 2.5 mm ≈ 12 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	80 mm	3.15 in
Thickness (t)	2.5 mm	0.10 in
Fillet radius (r)	5 mm	0.20 in
Weight	6.7 kg/m	4.53 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	858.9 mm²	1.331 in²
Moment of inertia (Ix)	126.86 cm⁴	3.05 in⁴
Moment of inertia (Iy)	90.17 cm⁴	2.17 in⁴
Elastic section modulus (Sx)	25.37 cm³	1.548 in³
Elastic section modulus (Sy)	22.54 cm³	1.376 in³
Plastic section modulus (Zx)	29.98 cm³	1.830 in³
Plastic section modulus (Zy)	25.77 cm³	1.573 in³
Radius of gyration (rx)	3.84 cm	1.513 in
Radius of gyration (ry)	3.24 cm	1.276 in