RHS 406x203x7.9 IMCA · Weight & Dimensions

IMCA, 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 406x203 (México) · Caño estructural 406x203 (Argentina)

The RHS 406x203x7.9 steel profile weighs 72.9 kg/m (49.01 lb/ft), has a depth of 406 mm (15.98 in), flange width 203 mm (7.99 in). Cross-sectional area: 9,211.84 mm². Moment of inertia Ix = 19,879.465 cm⁴, Iy = 6,810.744 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	406 mm	15.98 in
Width (b)	203 mm	7.99 in
Thickness (t)	7.9 mm	0.31 in
Fillet radius (r)	15.8 mm	0.62 in
Weight	72.9 kg/m	49.01 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	9,211.84 mm²	14.278 in²
Moment of inertia (Ix)	19,879.47 cm⁴	477.60 in⁴
Moment of inertia (Iy)	6,810.74 cm⁴	163.63 in⁴
Elastic section modulus (Sx)	979.28 cm³	59.760 in³
Elastic section modulus (Sy)	671.01 cm³	40.948 in³
Plastic section modulus (Zx)	1,207.46 cm³	73.684 in³
Plastic section modulus (Zy)	748.11 cm³	45.653 in³
Radius of gyration (rx)	14.69 cm	5.784 in
Radius of gyration (ry)	8.6 cm	3.385 in