Steel Section Catalog
RHS 70x50x4
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 70x50x4 steel profile weighs 6.7 kg/m (4.51 lb/ft), has a depth of 70 mm (2.76 in), flange width 50 mm (1.97 in). Cross-sectional area: 896 mm². Moment of inertia Ix = 59.5 cm⁴, Iy = 34.64 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 70 mm | 2.76 in |
| Width (b) | 50 mm | 1.97 in |
| Thickness (t) | 4 mm | 0.16 in |
| Fillet radius (r) | 8 mm | 0.31 in |
| Weight | 6.7 kg/m | 4.51 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 896 mm² | 1.389 in² |
| Moment of inertia (Ix) | 59.5 cm⁴ | 1.43 in⁴ |
| Moment of inertia (Iy) | 34.64 cm⁴ | 0.83 in⁴ |
| Elastic section modulus (Sx) | 17 cm³ | 1.037 in³ |
| Elastic section modulus (Sy) | 13.86 cm³ | 0.846 in³ |
| Plastic section modulus (Zx) | 20.89 cm³ | 1.275 in³ |
| Plastic section modulus (Zy) | 16.41 cm³ | 1.001 in³ |
| Radius of gyration (rx) | 2.58 cm | 1.016 in |
| Radius of gyration (ry) | 1.97 cm | 0.776 in |
Beam Calculator— RHS 70x50x4
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 70x50x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
141.81 mm
L/42
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
