RHS 305x51x6.4 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 305x51 cal 3 (México) · Caño estructural 305x51 (Argentina)

The RHS 305x51x6.4 steel profile weighs 33.4 kg/m (22.43 lb/ft), has a depth of 305 mm (12.01 in), flange width 51 mm (2.01 in). Cross-sectional area: 4,287.479 mm². Moment of inertia Ix = 3,875.079 cm⁴, Iy = 195.233 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)	51 mm	2.01 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	33.4 kg/m	22.43 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,287.48 mm²	6.646 in²
Moment of inertia (Ix)	3,875.08 cm⁴	93.10 in⁴
Moment of inertia (Iy)	195.23 cm⁴	4.69 in⁴
Elastic section modulus (Sx)	254.1 cm³	15.506 in³
Elastic section modulus (Sy)	76.56 cm³	4.672 in³
Plastic section modulus (Zx)	354.72 cm³	21.647 in³
Plastic section modulus (Zy)	89.17 cm³	5.441 in³
Radius of gyration (rx)	9.51 cm	3.743 in
Radius of gyration (ry)	2.13 cm	0.840 in