RHS 127x50.8x4.78 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 127x50.8 cal 6 (México) · Caño estructural 127x50.8 (Argentina)

The RHS 127x50.8x4.78 steel profile weighs 12.2 kg/m (8.17 lb/ft), has a depth of 127 mm (5.00 in), flange width 50.8 mm (2.00 in). Cross-sectional area: 1,549.535 mm². Moment of inertia Ix = 287.448 cm⁴, Iy = 66.582 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	127 mm	5.00 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	12.2 kg/m	8.17 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,549.53 mm²	2.402 in²
Moment of inertia (Ix)	287.45 cm⁴	6.91 in⁴
Moment of inertia (Iy)	66.58 cm⁴	1.60 in⁴
Elastic section modulus (Sx)	45.27 cm³	2.762 in³
Elastic section modulus (Sy)	26.21 cm³	1.600 in³
Plastic section modulus (Zx)	58.96 cm³	3.598 in³
Plastic section modulus (Zy)	30.56 cm³	1.865 in³
Radius of gyration (rx)	4.31 cm	1.696 in
Radius of gyration (ry)	2.07 cm	0.816 in