Steel Section Catalog
RHS 100x80x5
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 100x80x5 steel profile weighs 12.8 kg/m (8.60 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,700 mm². Moment of inertia Ix = 241.42 cm⁴, Iy = 169.42 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 5 mm | 0.20 in |
| Fillet radius (r) | 10 mm | 0.39 in |
| Weight | 12.8 kg/m | 8.60 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,700 mm² | 2.635 in² |
| Moment of inertia (Ix) | 241.42 cm⁴ | 5.80 in⁴ |
| Moment of inertia (Iy) | 169.42 cm⁴ | 4.07 in⁴ |
| Elastic section modulus (Sx) | 48.28 cm³ | 2.946 in³ |
| Elastic section modulus (Sy) | 42.35 cm³ | 2.584 in³ |
| Plastic section modulus (Zx) | 58.25 cm³ | 3.555 in³ |
| Plastic section modulus (Zy) | 49.75 cm³ | 3.036 in³ |
| Radius of gyration (rx) | 3.77 cm | 1.484 in |
| Radius of gyration (ry) | 3.16 cm | 1.244 in |
Beam Calculator— RHS 100x80x5
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 100x80x5
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
34.95 mm
L/172
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
