Steel Section Catalog
RHS 70x30x3
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 70x30x3 steel profile weighs 4.3 kg/m (2.86 lb/ft), has a depth of 70 mm (2.76 in), flange width 30 mm (1.18 in). Cross-sectional area: 564 mm². Moment of inertia Ix = 33.32 cm⁴, Iy = 8.38 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 70 mm | 2.76 in |
| Width (b) | 30 mm | 1.18 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 4.3 kg/m | 2.86 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 564 mm² | 0.874 in² |
| Moment of inertia (Ix) | 33.32 cm⁴ | 0.80 in⁴ |
| Moment of inertia (Iy) | 8.38 cm⁴ | 0.20 in⁴ |
| Elastic section modulus (Sx) | 9.52 cm³ | 0.581 in³ |
| Elastic section modulus (Sy) | 5.58 cm³ | 0.341 in³ |
| Plastic section modulus (Zx) | 12.17 cm³ | 0.743 in³ |
| Plastic section modulus (Zy) | 6.53 cm³ | 0.398 in³ |
| Radius of gyration (rx) | 2.43 cm | 0.957 in |
| Radius of gyration (ry) | 1.22 cm | 0.480 in |
Beam Calculator— RHS 70x30x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 70x30x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
253.23 mm
L/24
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
