RHS 127x51x4.8 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 127x51 cal 6 (México) · Caño estructural 127x51 (Argentina)

The RHS 127x51x4.8 steel profile weighs 12.1 kg/m (8.13 lb/ft), has a depth of 127 mm (5.00 in), flange width 51 mm (2.01 in). Cross-sectional area: 1,557.307 mm². Moment of inertia Ix = 289.082 cm⁴, Iy = 67.391 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	127 mm	5.00 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	12.1 kg/m	8.13 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,557.31 mm²	2.414 in²
Moment of inertia (Ix)	289.08 cm⁴	6.95 in⁴
Moment of inertia (Iy)	67.39 cm⁴	1.62 in⁴
Elastic section modulus (Sx)	45.52 cm³	2.778 in³
Elastic section modulus (Sy)	26.43 cm³	1.613 in³
Plastic section modulus (Zx)	59.28 cm³	3.617 in³
Plastic section modulus (Zy)	30.82 cm³	1.881 in³
Radius of gyration (rx)	4.31 cm	1.696 in
Radius of gyration (ry)	2.08 cm	0.819 in