Steel Section Catalog
RHS 40x80x2.0
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 40x80x2.0 steel profile weighs 3.6 kg/m (2.45 lb/ft), has a depth of 40 mm (1.57 in), flange width 80 mm (3.15 in). Cross-sectional area: 464 mm². Moment of inertia Ix = 13.12 cm⁴, Iy = 38.97 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 2 mm ≈ 14 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 40 mm | 1.57 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 2 mm | 0.08 in |
| Fillet radius (r) | 3 mm | 0.12 in |
| Weight | 3.6 kg/m | 2.45 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 464 mm² | 0.719 in² |
| Moment of inertia (Ix) | 13.12 cm⁴ | 0.32 in⁴ |
| Moment of inertia (Iy) | 38.97 cm⁴ | 0.94 in⁴ |
| Elastic section modulus (Sx) | 6.56 cm³ | 0.400 in³ |
| Elastic section modulus (Sy) | 9.74 cm³ | 0.594 in³ |
| Plastic section modulus (Zx) | 7.38 cm³ | 0.450 in³ |
| Plastic section modulus (Zy) | 12.02 cm³ | 0.734 in³ |
| Radius of gyration (rx) | 1.68 cm | 0.661 in |
| Radius of gyration (ry) | 2.9 cm | 1.142 in |
Beam Calculator— RHS 40x80x2.0
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 40x80x2.0
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
643.10 mm
L/9
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
