Steel Section Catalog
RHS 180x80x3
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 180x80x3 steel profile weighs 11.6 kg/m (7.80 lb/ft), has a depth of 180 mm (7.09 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,524 mm². Moment of inertia Ix = 639.39 cm⁴, Iy = 180.43 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 180 mm | 7.09 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 11.6 kg/m | 7.80 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,524 mm² | 2.362 in² |
| Moment of inertia (Ix) | 639.39 cm⁴ | 15.36 in⁴ |
| Moment of inertia (Iy) | 180.43 cm⁴ | 4.33 in⁴ |
| Elastic section modulus (Sx) | 71.04 cm³ | 4.335 in³ |
| Elastic section modulus (Sy) | 45.11 cm³ | 2.753 in³ |
| Plastic section modulus (Zx) | 87.89 cm³ | 5.363 in³ |
| Plastic section modulus (Zy) | 49.79 cm³ | 3.038 in³ |
| Radius of gyration (rx) | 6.48 cm | 2.551 in |
| Radius of gyration (ry) | 3.44 cm | 1.354 in |
Beam Calculator— RHS 180x80x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 180x80x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
13.20 mm
L/455
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
