Steel Section Catalog
RHS 100x80x4 — 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 100x80 cal 8 (México) · Caño estructural 100x80 (Argentina)
The RHS 100x80x4 steel profile weighs 10.5 kg/m (7.06 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,376 mm². Moment of inertia Ix = 199.45 cm⁴, Iy = 140.51 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) | 80 mm | 3.15 in |
| Thickness (t) | 4 mm | 0.16 in |
| Fillet radius (r) | 8 mm | 0.31 in |
| Weight | 10.5 kg/m | 7.06 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,376 mm² | 2.133 in² |
| Moment of inertia (Ix) | 199.45 cm⁴ | 4.79 in⁴ |
| Moment of inertia (Iy) | 140.51 cm⁴ | 3.38 in⁴ |
| Elastic section modulus (Sx) | 39.89 cm³ | 2.434 in³ |
| Elastic section modulus (Sy) | 35.13 cm³ | 2.144 in³ |
| Plastic section modulus (Zx) | 47.65 cm³ | 2.908 in³ |
| Plastic section modulus (Zy) | 40.77 cm³ | 2.488 in³ |
| Radius of gyration (rx) | 3.81 cm | 1.500 in |
| Radius of gyration (ry) | 3.2 cm | 1.260 in |
Beam Calculator— RHS 100x80x4
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mfixed @ 0mfixed @ 6m→kN/m
Results — RHS 100x80x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
42.30 mm
L/142
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
