Steel Section Catalog
RHS 180x80x5
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 180x80x5 steel profile weighs 18.9 kg/m (12.70 lb/ft), has a depth of 180 mm (7.09 in), flange width 80 mm (3.15 in). Cross-sectional area: 2,500 mm². Moment of inertia Ix = 1,022.08 cm⁴, Iy = 282.08 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 180 mm | 7.09 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 5 mm | 0.20 in |
| Fillet radius (r) | 10 mm | 0.39 in |
| Weight | 18.9 kg/m | 12.70 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 2,500 mm² | 3.875 in² |
| Moment of inertia (Ix) | 1,022.08 cm⁴ | 24.56 in⁴ |
| Moment of inertia (Iy) | 282.08 cm⁴ | 6.78 in⁴ |
| Elastic section modulus (Sx) | 113.56 cm³ | 6.930 in³ |
| Elastic section modulus (Sy) | 70.52 cm³ | 4.303 in³ |
| Plastic section modulus (Zx) | 142.25 cm³ | 8.681 in³ |
| Plastic section modulus (Zy) | 79.75 cm³ | 4.867 in³ |
| Radius of gyration (rx) | 6.39 cm | 2.516 in |
| Radius of gyration (ry) | 3.36 cm | 1.323 in |
Beam Calculator— RHS 180x80x5
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 180x80x5
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
8.26 mm
L/727
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
