RHS 203.2x101.6x4.78 CISC · Weight & Dimensions

CISC, 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 203.2x101.6 cal 6 (México) · Caño estructural 203.2x101.6 (Argentina)

The RHS 203.2x101.6x4.78 steel profile weighs 21.7 kg/m (14.58 lb/ft), has a depth of 203.2 mm (8.00 in), flange width 101.6 mm (4.00 in). Cross-sectional area: 2,763.655 mm². Moment of inertia Ix = 1,474.983 cm⁴, Iy = 503.098 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.78 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	203.2 mm	8.00 in
Width (b)	101.6 mm	4.00 in
Thickness (t)	4.8 mm	0.19 in
Fillet radius (r)	9.6 mm	0.38 in
Weight	21.7 kg/m	14.58 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,763.65 mm²	4.284 in²
Moment of inertia (Ix)	1,474.98 cm⁴	35.44 in⁴
Moment of inertia (Iy)	503.1 cm⁴	12.09 in⁴
Elastic section modulus (Sx)	145.18 cm³	8.859 in³
Elastic section modulus (Sy)	99.04 cm³	6.044 in³
Plastic section modulus (Zx)	180.05 cm³	10.988 in³
Plastic section modulus (Zy)	111.35 cm³	6.795 in³
Radius of gyration (rx)	7.31 cm	2.876 in
Radius of gyration (ry)	4.27 cm	1.680 in