RHS 406x305x7.9 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 406x305 (México) · Caño estructural 406x305 (Argentina)

The RHS 406x305x7.9 steel profile weighs 85.6 kg/m (57.50 lb/ft), has a depth of 406 mm (15.98 in), flange width 305 mm (12.01 in). Cross-sectional area: 10,823.44 mm². Moment of inertia Ix = 26,265.608 cm⁴, Iy = 16,977.216 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	406 mm	15.98 in
Width (b)	305 mm	12.01 in
Thickness (t)	7.9 mm	0.31 in
Fillet radius (r)	15.8 mm	0.62 in
Weight	85.6 kg/m	57.50 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	10,823.44 mm²	16.776 in²
Moment of inertia (Ix)	26,265.61 cm⁴	631.03 in⁴
Moment of inertia (Iy)	16,977.22 cm⁴	407.88 in⁴
Elastic section modulus (Sx)	1,293.87 cm³	78.957 in³
Elastic section modulus (Sy)	1,113.26 cm³	67.936 in³
Plastic section modulus (Zx)	1,528.25 cm³	93.260 in³
Plastic section modulus (Zy)	1,259.01 cm³	76.830 in³
Radius of gyration (rx)	15.58 cm	6.133 in
Radius of gyration (ry)	12.52 cm	4.931 in