Steel Section Catalog
RHS 80x50x3
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 80x50x3 steel profile weighs 5.7 kg/m (3.80 lb/ft), has a depth of 80 mm (3.15 in), flange width 50 mm (1.97 in). Cross-sectional area: 744 mm². Moment of inertia Ix = 64.75 cm⁴, Iy = 30.8 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 80 mm | 3.15 in |
| Width (b) | 50 mm | 1.97 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 5.7 kg/m | 3.80 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 744 mm² | 1.153 in² |
| Moment of inertia (Ix) | 64.75 cm⁴ | 1.56 in⁴ |
| Moment of inertia (Iy) | 30.8 cm⁴ | 0.74 in⁴ |
| Elastic section modulus (Sx) | 16.19 cm³ | 0.988 in³ |
| Elastic section modulus (Sy) | 12.32 cm³ | 0.752 in³ |
| Plastic section modulus (Zx) | 19.76 cm³ | 1.206 in³ |
| Plastic section modulus (Zy) | 14.18 cm³ | 0.865 in³ |
| Radius of gyration (rx) | 2.95 cm | 1.161 in |
| Radius of gyration (ry) | 2.03 cm | 0.799 in |
Beam Calculator— RHS 80x50x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 80x50x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
130.31 mm
L/46
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
