Steel Section Catalog
RHS 120x100x3
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 120x100x3 steel profile weighs 9.8 kg/m (6.57 lb/ft), has a depth of 120 mm (4.72 in), flange width 100 mm (3.94 in). Cross-sectional area: 1,284 mm². Moment of inertia Ix = 279.46 cm⁴, Iy = 210.95 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) | 100 mm | 3.94 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 9.8 kg/m | 6.57 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,284 mm² | 1.990 in² |
| Moment of inertia (Ix) | 279.46 cm⁴ | 6.71 in⁴ |
| Moment of inertia (Iy) | 210.95 cm⁴ | 5.07 in⁴ |
| Elastic section modulus (Sx) | 46.58 cm³ | 2.842 in³ |
| Elastic section modulus (Sy) | 42.19 cm³ | 2.575 in³ |
| Plastic section modulus (Zx) | 54.59 cm³ | 3.331 in³ |
| Plastic section modulus (Zy) | 48.17 cm³ | 2.940 in³ |
| Radius of gyration (rx) | 4.67 cm | 1.839 in |
| Radius of gyration (ry) | 4.05 cm | 1.594 in |
Beam Calculator— RHS 120x100x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 120x100x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
30.19 mm
L/199
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
