Steel Section Catalog
RHS 50x20x3
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 50x20x3 steel profile weighs 2.9 kg/m (1.92 lb/ft), has a depth of 50 mm (1.97 in), flange width 20 mm (0.79 in). Cross-sectional area: 384 mm². Moment of inertia Ix = 10.9 cm⁴, Iy = 2.33 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 50 mm | 1.97 in |
| Width (b) | 20 mm | 0.79 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 2.9 kg/m | 1.92 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 384 mm² | 0.595 in² |
| Moment of inertia (Ix) | 10.9 cm⁴ | 0.26 in⁴ |
| Moment of inertia (Iy) | 2.33 cm⁴ | 0.06 in⁴ |
| Elastic section modulus (Sx) | 4.36 cm³ | 0.266 in³ |
| Elastic section modulus (Sy) | 2.33 cm³ | 0.142 in³ |
| Plastic section modulus (Zx) | 5.72 cm³ | 0.349 in³ |
| Plastic section modulus (Zy) | 2.84 cm³ | 0.173 in³ |
| Radius of gyration (rx) | 1.68 cm | 0.661 in |
| Radius of gyration (ry) | 0.78 cm | 0.307 in |
Beam Calculator— RHS 50x20x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 50x20x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
774.08 mm
L/8
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
