RHS 70x40x3 Tata Steel Hybox · Weight & Dimensions

Tata Steel Hybox · 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 70x40 cal 11 (México) · Caño estructural 70x40 (Argentina)

The RHS 70x40x3 steel profile weighs 4.7 kg/m (3.17 lb/ft), has a depth of 70 mm (2.76 in), flange width 40 mm (1.57 in). Cross-sectional area: 600.823 mm². Moment of inertia Ix = 37.313 cm⁴, Iy = 15.498 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	70 mm	2.76 in
Width (b)	40 mm	1.57 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	4.7 kg/m	3.17 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	600.82 mm²	0.931 in²
Moment of inertia (Ix)	37.31 cm⁴	0.90 in⁴
Moment of inertia (Iy)	15.5 cm⁴	0.37 in⁴
Elastic section modulus (Sx)	10.66 cm³	0.651 in³
Elastic section modulus (Sy)	7.75 cm³	0.473 in³
Plastic section modulus (Zx)	13.39 cm³	0.817 in³
Plastic section modulus (Zy)	9.05 cm³	0.552 in³
Radius of gyration (rx)	2.49 cm	0.981 in
Radius of gyration (ry)	1.61 cm	0.632 in