RHS 76x51x6.4 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 76x51 cal 3 (México) · Caño estructural 76x51 (Argentina)

The RHS 76x51x6.4 steel profile weighs 10.6 kg/m (7.11 lb/ft), has a depth of 76 mm (2.99 in), flange width 51 mm (2.01 in). Cross-sectional area: 1,356.279 mm². Moment of inertia Ix = 91.963 cm⁴, Iy = 48.467 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	76 mm	2.99 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	10.6 kg/m	7.11 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,356.28 mm²	2.102 in²
Moment of inertia (Ix)	91.96 cm⁴	2.21 in⁴
Moment of inertia (Iy)	48.47 cm⁴	1.16 in⁴
Elastic section modulus (Sx)	24.2 cm³	1.477 in³
Elastic section modulus (Sy)	19.01 cm³	1.160 in³
Plastic section modulus (Zx)	31.62 cm³	1.929 in³
Plastic section modulus (Zy)	23.8 cm³	1.452 in³
Radius of gyration (rx)	2.6 cm	1.025 in
Radius of gyration (ry)	1.89 cm	0.744 in