Steel Section Catalog
RHS 70x50x3
BR — 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.
The RHS 70x50x3 steel profile weighs 5.2 kg/m (3.49 lb/ft), has a depth of 70 mm (2.76 in), flange width 50 mm (1.97 in). Cross-sectional area: 684 mm². Moment of inertia Ix = 46.8 cm⁴, Iy = 27.49 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) | 50 mm | 1.97 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 5.2 kg/m | 3.49 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 684 mm² | 1.060 in² |
| Moment of inertia (Ix) | 46.8 cm⁴ | 1.12 in⁴ |
| Moment of inertia (Iy) | 27.49 cm⁴ | 0.66 in⁴ |
| Elastic section modulus (Sx) | 13.37 cm³ | 0.816 in³ |
| Elastic section modulus (Sy) | 10.99 cm³ | 0.671 in³ |
| Plastic section modulus (Zx) | 16.19 cm³ | 0.988 in³ |
| Plastic section modulus (Zy) | 12.77 cm³ | 0.779 in³ |
| Radius of gyration (rx) | 2.62 cm | 1.031 in |
| Radius of gyration (ry) | 2 cm | 0.787 in |
Beam Calculator— RHS 70x50x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 70x50x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
180.29 mm
L/33
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
