Steel Section Catalog
RHS 120x80x5
EN — 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 120x80x5 steel profile weighs 14.2 kg/m (9.54 lb/ft), has a depth of 120 mm (4.72 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,900 mm². Moment of inertia Ix = 375.58 cm⁴, Iy = 197.58 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 120 mm | 4.72 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 5 mm | 0.20 in |
| Fillet radius (r) | 10 mm | 0.39 in |
| Weight | 14.2 kg/m | 9.54 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,900 mm² | 2.945 in² |
| Moment of inertia (Ix) | 375.58 cm⁴ | 9.02 in⁴ |
| Moment of inertia (Iy) | 197.58 cm⁴ | 4.75 in⁴ |
| Elastic section modulus (Sx) | 62.6 cm³ | 3.820 in³ |
| Elastic section modulus (Sy) | 49.4 cm³ | 3.015 in³ |
| Plastic section modulus (Zx) | 76.25 cm³ | 4.653 in³ |
| Plastic section modulus (Zy) | 57.25 cm³ | 3.494 in³ |
| Radius of gyration (rx) | 4.45 cm | 1.752 in |
| Radius of gyration (ry) | 3.22 cm | 1.268 in |
Beam Calculator— RHS 120x80x5
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 120x80x5
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
22.47 mm
L/267
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
