Steel Section Catalog
RHS 40x30x3 — Dimensions & Section Properties
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.
Also known as: PTR 40x30 cal 11 (México) · Caño estructural 40x30 (Argentina)
The RHS 40x30x3 steel profile weighs 2.9 kg/m (1.92 lb/ft), has a depth of 40 mm (1.57 in), flange width 30 mm (1.18 in). Cross-sectional area: 384 mm². Moment of inertia Ix = 8.14 cm⁴, Iy = 5.08 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 40 mm | 1.57 in |
| Width (b) | 30 mm | 1.18 in |
| Thickness (t) | 3 mm | 0.12 in |
| Fillet radius (r) | 6 mm | 0.24 in |
| Weight | 2.9 kg/m | 1.92 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 384 mm² | 0.595 in² |
| Moment of inertia (Ix) | 8.14 cm⁴ | 0.20 in⁴ |
| Moment of inertia (Iy) | 5.08 cm⁴ | 0.12 in⁴ |
| Elastic section modulus (Sx) | 4.07 cm³ | 0.248 in³ |
| Elastic section modulus (Sy) | 3.39 cm³ | 0.207 in³ |
| Plastic section modulus (Zx) | 5.06 cm³ | 0.309 in³ |
| Plastic section modulus (Zy) | 4.1 cm³ | 0.250 in³ |
| Radius of gyration (rx) | 1.46 cm | 0.575 in |
| Radius of gyration (ry) | 1.15 cm | 0.453 in |
Beam Calculator— RHS 40x30x3
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 40x30x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
1036.55 mm
L/6
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
