RHS 101.6x50.8x4.78 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 101.6x50.8 cal 6 (México) · Caño estructural 101.6x50.8 (Argentina)

The RHS 101.6x50.8x4.78 steel profile weighs 10.3 kg/m (6.89 lb/ft), has a depth of 101.6 mm (4.00 in), flange width 50.8 mm (2.00 in). Cross-sectional area: 1,306.711 mm². Moment of inertia Ix = 161.382 cm⁴, Iy = 53.679 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	101.6 mm	4.00 in
Width (b)	50.8 mm	2.00 in
Thickness (t)	4.8 mm	0.19 in
Fillet radius (r)	9.6 mm	0.38 in
Weight	10.3 kg/m	6.89 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,306.71 mm²	2.025 in²
Moment of inertia (Ix)	161.38 cm⁴	3.88 in⁴
Moment of inertia (Iy)	53.68 cm⁴	1.29 in⁴
Elastic section modulus (Sx)	31.77 cm³	1.939 in³
Elastic section modulus (Sy)	21.13 cm³	1.290 in³
Plastic section modulus (Zx)	40.82 cm³	2.491 in³
Plastic section modulus (Zy)	24.97 cm³	1.524 in³
Radius of gyration (rx)	3.51 cm	1.384 in
Radius of gyration (ry)	2.03 cm	0.798 in