Steel Section Catalog
RHS 180x80x4
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 180x80x4 steel profile weighs 15.3 kg/m (10.28 lb/ft), has a depth of 180 mm (7.09 in), flange width 80 mm (3.15 in). Cross-sectional area: 2,016 mm². Moment of inertia Ix = 834.93 cm⁴, Iy = 233.01 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 180 mm | 7.09 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 4 mm | 0.16 in |
| Fillet radius (r) | 8 mm | 0.31 in |
| Weight | 15.3 kg/m | 10.28 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 2,016 mm² | 3.125 in² |
| Moment of inertia (Ix) | 834.93 cm⁴ | 20.06 in⁴ |
| Moment of inertia (Iy) | 233.01 cm⁴ | 5.60 in⁴ |
| Elastic section modulus (Sx) | 92.77 cm³ | 5.661 in³ |
| Elastic section modulus (Sy) | 58.25 cm³ | 3.555 in³ |
| Plastic section modulus (Zx) | 115.49 cm³ | 7.048 in³ |
| Plastic section modulus (Zy) | 65.09 cm³ | 3.972 in³ |
| Radius of gyration (rx) | 6.44 cm | 2.535 in |
| Radius of gyration (ry) | 3.4 cm | 1.339 in |
Beam Calculator— RHS 180x80x4
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 180x80x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
10.11 mm
L/594
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
