UK Rolled Steel Joists & Section Properties
Browse Rolled steel joists from the British steel section catalog. Compare metric-native dimensions and section properties, open a designation for full details, or load a section into Optimal Beam.
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Showing UK · Rolled Steel Joists · Metric
British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · 1,196 sections
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Showing the most relevant 75 sections.
| Designation | Weight (kg/m) | Depth, d (mm) | Width (mm) | Area (mm²) | Ix (mm⁴) | Sx (mm³) |
|---|---|---|---|---|---|---|
| RSJ 254×114×37 | 37 | 254 | 114 | 4730 | 50800000 | 400000 |
| RSJ 254×203×82 | 82 | 254 | 203 | 10500 | 120000000 | 947000 |
| RSJ 203×152×52 | 52 | 203.2 | 152 | 6660 | 48000000 | 472000 |
| RSJ 152×127×37 | 37 | 152.4 | 127 | 4750 | 18200000 | 239000 |
| RSJ 127×76×16 | 16 | 127 | 76 | 2110 | 5710000 | 90000 |
| RSJ 127×114×27 | 27 | 127 | 114 | 3420 | 9460000 | 149000 |
| RSJ 127×114×29 | 29 | 127 | 114 | 3740 | 9790000 | 154000 |
| RSJ 114×114×27 | 27 | 114.3 | 114 | 3450 | 7360000 | 129000 |
| RSJ 102×44×7 | 7 | 101.6 | 44 | 950 | 1530000 | 30100 |
| RSJ 102×102×23 | 23 | 101.6 | 102 | 2930 | 4860000 | 95600 |
| RSJ 89×89×19 | 19 | 88.9 | 89 | 2490 | 3070000 | 69000 |
| RSJ 76×76×13 | 13 | 76.2 | 76 | 1620 | 1580000 | 41500 |
| RSJ 76×76×15 | 15 | 76.2 | 76 | 1910 | 1720000 | 45200 |
Family overview
What are UK Rolled Steel Joists?
Browse Rolled steel joists from the British steel section catalog. Compare metric-native dimensions and section properties, open a designation for full details, or load a section into Optimal Beam.
Designations
Understanding Rolled Steel Joists designations
RSJ designations list nominal depth × flange width × mass for rolled steel joists.
Properties
Rolled Steel Joists properties explained
These properties are especially relevant when comparing Rolled Steel Joists. View the complete property glossary.
| Symbol | Property | Units | Why it matters |
|---|---|---|---|
| Weight | Weight | lb/ft, kg/m | Mass per unit length; used for self-weight and economy comparisons |
| d | Overall depth | in, mm | Overall depth and clearance |
| bf | Flange width | in, mm | Overall flange width and lateral behaviour |
| tw | Web thickness | in, mm | Web thickness and shear-related behaviour |
| tf | Flange thickness | in, mm | Flange thickness and flexural/local behaviour |
| A | Cross-sectional area | in², mm² | Total steel cross-sectional area |
| Ix | Moment of inertia (x) | in⁴, mm⁴ | Major-axis flexural stiffness |
| Iy | Moment of inertia (y) | in⁴, mm⁴ | Minor-axis flexural stiffness |
| Sx | Elastic section modulus (x) | in³, mm³ | Elastic bending property about the x-axis |
| Sy | Elastic section modulus (y) | in³, mm³ | Elastic bending property about the y-axis |
| Zx | Plastic section modulus (x) | in³, mm³ | Plastic bending property about the x-axis |
| Zy | Plastic section modulus (y) | in³, mm³ | Plastic bending property about the y-axis |
| rx | Radius of gyration (x) | in, mm | Strong-axis radius of gyration |
| ry | Radius of gyration (y) | in, mm | Weak-axis radius of gyration and lateral stability relevance |
| J | Torsional constant | in⁴, mm⁴ | Torsional constant |
| Cw | Warping constant | in⁶, mm⁶ | Warping constant for lateral-torsional behaviour |
Library summary
Computed Rolled Steel Joists summary
The current UK Rolled Steel Joists library contains 13 sections across 8 nominal-depth series. Published weights range from 4.70 to 55.10 lb/ft , and actual depths range from 3.00 to 10.00 inches .
- Lightest section
- RSJ 102x44x7
- Heaviest section
- RSJ 254x203x82
- Ix range
- 3.68 – 288.30 in⁴
- Sx range
- 1.84 – 57.79 in³
Related families
Related UK families
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables v2023.11 · Verified July 2026 · View methodology