Steel Section Catalog
RHS 20x30x1.5
EN — 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 20x30x1.5 steel profile weighs 1.1 kg/m (0.74 lb/ft), has a depth of 20 mm (0.79 in), flange width 30 mm (1.18 in). Cross-sectional area: 141 mm². Moment of inertia Ix = 0.89 cm⁴, Iy = 1.71 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 1.5 mm ≈ 16 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 20 mm | 0.79 in |
| Width (b) | 30 mm | 1.18 in |
| Thickness (t) | 1.5 mm | 0.06 in |
| Fillet radius (r) | 2.3 mm | 0.09 in |
| Weight | 1.1 kg/m | 0.74 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 141 mm² | 0.219 in² |
| Moment of inertia (Ix) | 0.89 cm⁴ | 0.02 in⁴ |
| Moment of inertia (Iy) | 1.71 cm⁴ | 0.04 in⁴ |
| Elastic section modulus (Sx) | 0.89 cm³ | 0.054 in³ |
| Elastic section modulus (Sy) | 1.14 cm³ | 0.070 in³ |
| Plastic section modulus (Zx) | 1.05 cm³ | 0.064 in³ |
| Plastic section modulus (Zy) | 1.4 cm³ | 0.085 in³ |
| Radius of gyration (rx) | 0.8 cm | 0.315 in |
| Radius of gyration (ry) | 1.1 cm | 0.433 in |
Beam Calculator— RHS 20x30x1.5
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 20x30x1.5
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
9480.34 mm
L/1
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
