Steel Section Catalog
RHS 20x40x1.5
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 20x40x1.5 steel profile weighs 1.3 kg/m (0.90 lb/ft), has a depth of 20 mm (0.79 in), flange width 40 mm (1.57 in). Cross-sectional area: 171 mm². Moment of inertia Ix = 1.15 cm⁴, Iy = 3.49 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) | 40 mm | 1.57 in |
| Thickness (t) | 1.5 mm | 0.06 in |
| Fillet radius (r) | 2.3 mm | 0.09 in |
| Weight | 1.3 kg/m | 0.90 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 171 mm² | 0.265 in² |
| Moment of inertia (Ix) | 1.15 cm⁴ | 0.03 in⁴ |
| Moment of inertia (Iy) | 3.49 cm⁴ | 0.08 in⁴ |
| Elastic section modulus (Sx) | 1.15 cm³ | 0.070 in³ |
| Elastic section modulus (Sy) | 1.75 cm³ | 0.107 in³ |
| Plastic section modulus (Zx) | 1.33 cm³ | 0.081 in³ |
| Plastic section modulus (Zy) | 2.18 cm³ | 0.133 in³ |
| Radius of gyration (rx) | 0.82 cm | 0.323 in |
| Radius of gyration (ry) | 1.43 cm | 0.563 in |
Beam Calculator— RHS 20x40x1.5
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 20x40x1.5
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
7336.96 mm
L/1
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
