RHS 203x51x4.8 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 203x51 cal 6 (México) · Caño estructural 203x51 (Argentina)

The RHS 203x51x4.8 steel profile weighs 17.8 kg/m (11.98 lb/ft), has a depth of 203 mm (7.99 in), flange width 51 mm (2.01 in). Cross-sectional area: 2,286.907 mm². Moment of inertia Ix = 999.596 cm⁴, Iy = 106.463 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	203 mm	7.99 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	17.8 kg/m	11.98 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,286.91 mm²	3.545 in²
Moment of inertia (Ix)	999.6 cm⁴	24.02 in⁴
Moment of inertia (Iy)	106.46 cm⁴	2.56 in⁴
Elastic section modulus (Sx)	98.48 cm³	6.010 in³
Elastic section modulus (Sy)	41.75 cm³	2.548 in³
Plastic section modulus (Zx)	132.32 cm³	8.075 in³
Plastic section modulus (Zy)	47.67 cm³	2.909 in³
Radius of gyration (rx)	6.61 cm	2.603 in
Radius of gyration (ry)	2.16 cm	0.849 in