Steel Section Catalog
RHS 80x50x4
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 80x50x4 steel profile weighs 7.4 kg/m (4.96 lb/ft), has a depth of 80 mm (3.15 in), flange width 50 mm (1.97 in). Cross-sectional area: 976 mm². Moment of inertia Ix = 82.7 cm⁴, Iy = 38.88 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 80 mm | 3.15 in |
| Width (b) | 50 mm | 1.97 in |
| Thickness (t) | 4 mm | 0.16 in |
| Fillet radius (r) | 8 mm | 0.31 in |
| Weight | 7.4 kg/m | 4.96 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 976 mm² | 1.513 in² |
| Moment of inertia (Ix) | 82.7 cm⁴ | 1.99 in⁴ |
| Moment of inertia (Iy) | 38.88 cm⁴ | 0.93 in⁴ |
| Elastic section modulus (Sx) | 20.67 cm³ | 1.261 in³ |
| Elastic section modulus (Sy) | 15.55 cm³ | 0.949 in³ |
| Plastic section modulus (Zx) | 25.57 cm³ | 1.560 in³ |
| Plastic section modulus (Zy) | 18.25 cm³ | 1.114 in³ |
| Radius of gyration (rx) | 2.91 cm | 1.146 in |
| Radius of gyration (ry) | 2 cm | 0.787 in |
Beam Calculator— RHS 80x50x4
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 80x50x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
102.03 mm
L/59
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
