RHS 180x100x5 GOST · Weight & Dimensions

GOST, 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 180x100 cal 6 (México) · Caño estructural 180x100 (Argentina)

The RHS 180x100x5 steel profile weighs 20.7 kg/m (13.90 lb/ft), has a depth of 180 mm (7.09 in), flange width 100 mm (3.94 in). Cross-sectional area: 2,635.619 mm². Moment of inertia Ix = 1,124.199 cm⁴, Iy = 451.769 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	180 mm	7.09 in
Width (b)	100 mm	3.94 in
Thickness (t)	5 mm	0.20 in
Fillet radius (r)	10 mm	0.39 in
Weight	20.7 kg/m	13.90 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,635.62 mm²	4.085 in²
Moment of inertia (Ix)	1,124.2 cm⁴	27.01 in⁴
Moment of inertia (Iy)	451.77 cm⁴	10.85 in⁴
Elastic section modulus (Sx)	124.91 cm³	7.623 in³
Elastic section modulus (Sy)	90.35 cm³	5.514 in³
Plastic section modulus (Zx)	154.02 cm³	9.399 in³
Plastic section modulus (Zy)	102.59 cm³	6.261 in³
Radius of gyration (rx)	6.53 cm	2.571 in
Radius of gyration (ry)	4.14 cm	1.630 in