Steel Section Catalog
RHS 120x40x4
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 120x40x4 steel profile weighs 9.2 kg/m (6.20 lb/ft), has a depth of 120 mm (4.72 in), flange width 40 mm (1.57 in). Cross-sectional area: 1,216 mm². Moment of inertia Ix = 201.35 cm⁴, Iy = 33.42 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 120 mm | 4.72 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 4 mm | 0.16 in |
| Fillet radius (r) | 8 mm | 0.31 in |
| Weight | 9.2 kg/m | 6.20 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,216 mm² | 1.885 in² |
| Moment of inertia (Ix) | 201.35 cm⁴ | 4.84 in⁴ |
| Moment of inertia (Iy) | 33.42 cm⁴ | 0.80 in⁴ |
| Elastic section modulus (Sx) | 33.56 cm³ | 2.048 in³ |
| Elastic section modulus (Sy) | 16.71 cm³ | 1.020 in³ |
| Plastic section modulus (Zx) | 43.65 cm³ | 2.664 in³ |
| Plastic section modulus (Zy) | 19.33 cm³ | 1.180 in³ |
| Radius of gyration (rx) | 4.07 cm | 1.602 in |
| Radius of gyration (ry) | 1.66 cm | 0.654 in |
Beam Calculator— RHS 120x40x4
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 120x40x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
41.90 mm
L/143
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
