RHS 127x51x7.9 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 (México) · Caño estructural 127x51 (Argentina)

The RHS 127x51x7.9 steel profile weighs 18.9 kg/m (12.71 lb/ft), has a depth of 127 mm (5.00 in), flange width 51 mm (2.01 in). Cross-sectional area: 2,402.04 mm². Moment of inertia Ix = 405.499 cm⁴, Iy = 90.796 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	127 mm	5.00 in
Width (b)	51 mm	2.01 in
Thickness (t)	7.9 mm	0.31 in
Fillet radius (r)	15.8 mm	0.62 in
Weight	18.9 kg/m	12.71 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,402.04 mm²	3.723 in²
Moment of inertia (Ix)	405.5 cm⁴	9.74 in⁴
Moment of inertia (Iy)	90.8 cm⁴	2.18 in⁴
Elastic section modulus (Sx)	63.86 cm³	3.897 in³
Elastic section modulus (Sy)	35.61 cm³	2.173 in³
Plastic section modulus (Zx)	86.86 cm³	5.301 in³
Plastic section modulus (Zy)	44.28 cm³	2.702 in³
Radius of gyration (rx)	4.11 cm	1.618 in
Radius of gyration (ry)	1.94 cm	0.765 in