RHS 305x51x4.8 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 6 (México) · Caño estructural 305x51 (Argentina)

The RHS 305x51x4.8 steel profile weighs 25.4 kg/m (17.09 lb/ft), has a depth of 305 mm (12.01 in), flange width 51 mm (2.01 in). Cross-sectional area: 3,266.107 mm². Moment of inertia Ix = 3,028.972 cm⁴, Iy = 158.902 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.8 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	305 mm	12.01 in
Width (b)	51 mm	2.01 in
Thickness (t)	4.8 mm	0.19 in
Fillet radius (r)	9.6 mm	0.38 in
Weight	25.4 kg/m	17.09 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,266.11 mm²	5.062 in²
Moment of inertia (Ix)	3,028.97 cm⁴	72.77 in⁴
Moment of inertia (Iy)	158.9 cm⁴	3.82 in⁴
Elastic section modulus (Sx)	198.62 cm³	12.121 in³
Elastic section modulus (Sy)	62.31 cm³	3.803 in³
Plastic section modulus (Zx)	273.92 cm³	16.716 in³
Plastic section modulus (Zy)	70.29 cm³	4.289 in³
Radius of gyration (rx)	9.63 cm	3.791 in
Radius of gyration (ry)	2.21 cm	0.868 in