Steel Section Catalog
RHS 100x40x3
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 100x40x3 steel profile weighs 6.1 kg/m (4.12 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 804 mm². Moment of inertia Ix = 98 cm⁴, Iy = 22.55 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 6.1 kg/m | 4.12 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 804 mm² | 1.246 in² |
| Moment of inertia (Ix) | 98 cm⁴ | 2.35 in⁴ |
| Moment of inertia (Iy) | 22.55 cm⁴ | 0.54 in⁴ |
| Elastic section modulus (Sx) | 19.6 cm³ | 1.196 in³ |
| Elastic section modulus (Sy) | 11.27 cm³ | 0.688 in³ |
| Plastic section modulus (Zx) | 24.89 cm³ | 1.519 in³ |
| Plastic section modulus (Zy) | 12.83 cm³ | 0.783 in³ |
| Radius of gyration (rx) | 3.49 cm | 1.374 in |
| Radius of gyration (ry) | 1.67 cm | 0.657 in |
Beam Calculator— RHS 100x40x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 100x40x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
86.10 mm
L/70
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
