Steel Section Catalog
RHS 120x100x4
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 120x100x4 steel profile weighs 12.9 kg/m (8.67 lb/ft), has a depth of 120 mm (4.72 in), flange width 100 mm (3.94 in). Cross-sectional area: 1,696 mm². Moment of inertia Ix = 362.89 cm⁴, Iy = 273.22 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) | 100 mm | 3.94 in |
| Thickness (t) | 4 mm | 0.16 in |
| Fillet radius (r) | 8 mm | 0.31 in |
| Weight | 12.9 kg/m | 8.67 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,696 mm² | 2.629 in² |
| Moment of inertia (Ix) | 362.89 cm⁴ | 8.72 in⁴ |
| Moment of inertia (Iy) | 273.22 cm⁴ | 6.56 in⁴ |
| Elastic section modulus (Sx) | 60.48 cm³ | 3.691 in³ |
| Elastic section modulus (Sy) | 54.64 cm³ | 3.334 in³ |
| Plastic section modulus (Zx) | 71.49 cm³ | 4.363 in³ |
| Plastic section modulus (Zy) | 63.01 cm³ | 3.845 in³ |
| Radius of gyration (rx) | 4.63 cm | 1.823 in |
| Radius of gyration (ry) | 4.01 cm | 1.579 in |
Beam Calculator— RHS 120x100x4
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 120x100x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
23.25 mm
L/258
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
