Steel Section Catalog
RHS 100x80x3
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 100x80x3 steel profile weighs 8.0 kg/m (5.34 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,044 mm². Moment of inertia Ix = 154.47 cm⁴, Iy = 109.24 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 8.0 kg/m | 5.34 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,044 mm² | 1.618 in² |
| Moment of inertia (Ix) | 154.47 cm⁴ | 3.71 in⁴ |
| Moment of inertia (Iy) | 109.24 cm⁴ | 2.62 in⁴ |
| Elastic section modulus (Sx) | 30.89 cm³ | 1.885 in³ |
| Elastic section modulus (Sy) | 27.31 cm³ | 1.667 in³ |
| Plastic section modulus (Zx) | 36.53 cm³ | 2.229 in³ |
| Plastic section modulus (Zy) | 31.31 cm³ | 1.911 in³ |
| Radius of gyration (rx) | 3.85 cm | 1.516 in |
| Radius of gyration (ry) | 3.23 cm | 1.272 in |
Beam Calculator— RHS 100x80x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 100x80x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
54.62 mm
L/110
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
