Steel Section Catalog
RHS 40x80x1.5
EN — 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 40x80x1.5 steel profile weighs 2.8 kg/m (1.85 lb/ft), has a depth of 40 mm (1.57 in), flange width 80 mm (3.15 in). Cross-sectional area: 351 mm². Moment of inertia Ix = 10.16 cm⁴, Iy = 29.9 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 1.5 mm ≈ 16 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 40 mm | 1.57 in |
| Width (b) | 80 mm | 3.15 in |
| Thickness (t) | 1.5 mm | 0.06 in |
| Fillet radius (r) | 2.3 mm | 0.09 in |
| Weight | 2.8 kg/m | 1.85 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 351 mm² | 0.544 in² |
| Moment of inertia (Ix) | 10.16 cm⁴ | 0.24 in⁴ |
| Moment of inertia (Iy) | 29.9 cm⁴ | 0.72 in⁴ |
| Elastic section modulus (Sx) | 5.08 cm³ | 0.310 in³ |
| Elastic section modulus (Sy) | 7.48 cm³ | 0.456 in³ |
| Plastic section modulus (Zx) | 5.65 cm³ | 0.345 in³ |
| Plastic section modulus (Zy) | 9.16 cm³ | 0.559 in³ |
| Radius of gyration (rx) | 1.7 cm | 0.669 in |
| Radius of gyration (ry) | 2.92 cm | 1.150 in |
Beam Calculator— RHS 40x80x1.5
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 40x80x1.5
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
830.46 mm
L/7
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
