Steel Section Catalog
RHS 100x40x4
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 100x40x4 steel profile weighs 8.0 kg/m (5.34 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 1,056 mm². Moment of inertia Ix = 125.68 cm⁴, Iy = 28.21 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 4 mm | 0.16 in |
| Fillet radius (r) | 8 mm | 0.31 in |
| Weight | 8.0 kg/m | 5.34 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,056 mm² | 1.637 in² |
| Moment of inertia (Ix) | 125.68 cm⁴ | 3.02 in⁴ |
| Moment of inertia (Iy) | 28.21 cm⁴ | 0.68 in⁴ |
| Elastic section modulus (Sx) | 25.14 cm³ | 1.534 in³ |
| Elastic section modulus (Sy) | 14.11 cm³ | 0.861 in³ |
| Plastic section modulus (Zx) | 32.29 cm³ | 1.970 in³ |
| Plastic section modulus (Zy) | 16.45 cm³ | 1.004 in³ |
| Radius of gyration (rx) | 3.45 cm | 1.358 in |
| Radius of gyration (ry) | 1.63 cm | 0.642 in |
Beam Calculator— RHS 100x40x4
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 100x40x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
67.13 mm
L/89
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
