Steel Section Catalog
RHS 100x80x3 — 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 100x80 cal 11 (México) · Caño estructural 100x80 (Argentina)
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:
