Steel Section Catalog
RHS 80x50x3 — Dimensions & Section Properties
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.
Also known as: PTR 80x50 cal 11 (México) · Caño estructural 80x50 (Argentina)
The RHS 80x50x3 steel profile weighs 5.7 kg/m (3.80 lb/ft), has a depth of 80 mm (3.15 in), flange width 50 mm (1.97 in). Cross-sectional area: 744 mm². Moment of inertia Ix = 64.75 cm⁴, Iy = 30.8 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 80 mm | 3.15 in |
| Width (b) | 50 mm | 1.97 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 5.7 kg/m | 3.80 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 744 mm² | 1.153 in² |
| Moment of inertia (Ix) | 64.75 cm⁴ | 1.56 in⁴ |
| Moment of inertia (Iy) | 30.8 cm⁴ | 0.74 in⁴ |
| Elastic section modulus (Sx) | 16.19 cm³ | 0.988 in³ |
| Elastic section modulus (Sy) | 12.32 cm³ | 0.752 in³ |
| Plastic section modulus (Zx) | 19.76 cm³ | 1.206 in³ |
| Plastic section modulus (Zy) | 14.18 cm³ | 0.865 in³ |
| Radius of gyration (rx) | 2.95 cm | 1.161 in |
| Radius of gyration (ry) | 2.03 cm | 0.799 in |
Beam Calculator— RHS 80x50x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 80x50x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
130.31 mm
L/46
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
