Steel Section Catalog
RHS 120x40x3
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 120x40x3 steel profile weighs 7.1 kg/m (4.75 lb/ft), has a depth of 120 mm (4.72 in), flange width 40 mm (1.57 in). Cross-sectional area: 924 mm². Moment of inertia Ix = 156.23 cm⁴, Iy = 26.66 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 120 mm | 4.72 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 7.1 kg/m | 4.75 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 924 mm² | 1.432 in² |
| Moment of inertia (Ix) | 156.23 cm⁴ | 3.75 in⁴ |
| Moment of inertia (Iy) | 26.66 cm⁴ | 0.64 in⁴ |
| Elastic section modulus (Sx) | 26.04 cm³ | 1.589 in³ |
| Elastic section modulus (Sy) | 13.33 cm³ | 0.813 in³ |
| Plastic section modulus (Zx) | 33.53 cm³ | 2.046 in³ |
| Plastic section modulus (Zy) | 15.05 cm³ | 0.918 in³ |
| Radius of gyration (rx) | 4.11 cm | 1.618 in |
| Radius of gyration (ry) | 1.7 cm | 0.669 in |
Beam Calculator— RHS 120x40x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 120x40x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
54.01 mm
L/111
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
