Steel Section Catalog
RHS 70x30x3 — 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 70x30 cal 11 (México) · Caño estructural 70x30 (Argentina)
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:
