RHS 102x51x6.4 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 102x51 cal 3 (México) · Caño estructural 102x51 (Argentina)

The RHS 102x51x6.4 steel profile weighs 13.1 kg/m (8.82 lb/ft), has a depth of 102 mm (4.02 in), flange width 51 mm (2.01 in). Cross-sectional area: 1,689.079 mm². Moment of inertia Ix = 198.965 cm⁴, Iy = 65.13 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	102 mm	4.02 in
Width (b)	51 mm	2.01 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	13.1 kg/m	8.82 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,689.08 mm²	2.618 in²
Moment of inertia (Ix)	198.96 cm⁴	4.78 in⁴
Moment of inertia (Iy)	65.13 cm⁴	1.56 in⁴
Elastic section modulus (Sx)	39.01 cm³	2.381 in³
Elastic section modulus (Sy)	25.54 cm³	1.559 in³
Plastic section modulus (Zx)	51.41 cm³	3.137 in³
Plastic section modulus (Zy)	31.22 cm³	1.905 in³
Radius of gyration (rx)	3.43 cm	1.351 in
Radius of gyration (ry)	1.96 cm	0.773 in