RHS 305x203x6.4 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 305x203 cal 3 (México) · Caño estructural 305x203 (Argentina)

The RHS 305x203x6.4 steel profile weighs 48.6 kg/m (32.64 lb/ft), has a depth of 305 mm (12.01 in), flange width 203 mm (7.99 in). Cross-sectional area: 6,233.079 mm². Moment of inertia Ix = 8,212.581 cm⁴, Iy = 4,401.594 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	305 mm	12.01 in
Width (b)	203 mm	7.99 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	48.6 kg/m	32.64 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	6,233.08 mm²	9.661 in²
Moment of inertia (Ix)	8,212.58 cm⁴	197.31 in⁴
Moment of inertia (Iy)	4,401.59 cm⁴	105.75 in⁴
Elastic section modulus (Sx)	538.53 cm³	32.863 in³
Elastic section modulus (Sy)	433.65 cm³	26.463 in³
Plastic section modulus (Zx)	645.2 cm³	39.373 in³
Plastic section modulus (Zy)	488.95 cm³	29.838 in³
Radius of gyration (rx)	11.48 cm	4.519 in
Radius of gyration (ry)	8.4 cm	3.308 in