Steel Beam Sizes / UK / Rolled Steel Joists / RSJ 102×102×23
RSJ 102×102×23 Steel Beam Dimensions and Properties
UK Rolled steel joists · v2023.11
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
RSJ 102×102×23 dimensions
Not to scale. Dimensions shown for reference.
Section properties
Symbols match the steel section finder. Imperial and metric values are shown side by side.
| Property | Imperial | Metric |
|---|---|---|
| Weight | 15.46 lb/ft | 23.00 kg/m |
| Depth, d | 4.00 in | 101.60 mm |
| Flange width, bf | 4.02 in | 102.00 mm |
| Area | 4.54 in² | 2,930.00 mm² |
| Ix | 11.68 in⁴ | 4,860,000 mm⁴ |
| Iy | 3.70 in⁴ | 1,540,000 mm⁴ |
| Sx | 5.83 in³ | 95,600.00 mm³ |
| Sy | 1.85 in³ | 30,300.00 mm³ |
| Zx | 6.90 in³ | 113,000.00 mm³ |
| Zy | 3.09 in³ | 50,600.00 mm³ |
| rx | 1.60 in | 40.70 mm |
| ry | 0.90 in | 22.90 mm |
| J | 0.34 in⁴ | 142,000.00 mm⁴ |
| Cw | 11.95 in⁶ | 3,210,000,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus RSJ 102×102×23.
Lighter in Rolled steel joists
RSJ 89×89×19
- Weight
- 19.0 kg/m (-17%)
- Depth
- 88.9 mm (-13%)
- Ix
- 3,070,000 mm⁴ (-37%)
Heavier in Rolled steel joists
RSJ 114×114×27
- Weight
- 27.0 kg/m (+17%)
- Depth
- 114.3 mm (+13%)
- Ix
- 7,360,000 mm⁴ (+51%)
Closest Iₓ in Rolled steel joists
RSJ 127×76×16
- Weight
- 16.0 kg/m (-30%)
- Depth
- 127.0 mm (+25%)
- Ix
- 5,710,000 mm⁴ (+17%)
Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology