203x133x30 UB UB — UK Universal Beam Section Properties
203x133x30 UB is a UK UB (Universal Beam) per BS 4-1 and EN 10365 hot-rolled structural steel section. British Steel Advance sections.
Dimensions (Metric)
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 207 | mm |
| Flange Width (bf) | 134 | mm |
| Flange Thickness (tf) | 9.6 | mm |
| Web Thickness (tw) | 6.4 | mm |
| Cross-Sectional Area (A) | 38.2 | cmÃÂò |
| Mass | 30.0 | kg/m |
Elastic Section Properties (Metric)
| Property | Strong Axis (Y-Y) | Weak Axis (Z-Z) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 2,900 | 385 | cmâÃÂô |
| Elastic Section Modulus (S) | 280 | 111 | cmÃÂó |
| Plastic Section Modulus (Z) | 316 | 171 | cmÃÂó |
| Radius of Gyration (i) | 3.18 | 3.18 | cm |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 7 | cmâÃÂô |
| Warping Constant (Cw) | 24,000 | cmâÃÂö |
Design Resources
- UK Steel Design Guide (EN 1993) — Eurocode 3 + UK National Annex
- UK Section Properties Guide — UB, UC, PFC overview
- Beam Capacity Calculator — Check 203x133x30 UB for your loads
- Column Capacity Calculator — Check 203x133x30 UB as a column
- Section Properties Database — Compare with other sections
Frequently Asked Questions
What is the 203x133x30 UB section depth? The 203x133x30 UB has a nominal depth of 206.8mm and a flange width of 134mm. The UB series is produced to BS 4-1 and EN 10365 by British Steel (Scunthorpe) and Tata Steel.
What steel grade is standard for 203x133x30 UB? Typically S355J2 per EN 10025-2. Also available as S275JR. Verify grade requirements per EN 1993-1-1 and the UK National Annex.
What is the mass of a 203x133x30 UB beam? 30.0 kg/m. A 12m length weighs approximately 360 kg.
What is the section modulus of 203x133x30 UB? S_y = 280 cmÃÂó (strong axis) and S_z = 111 cmÃÂó (weak axis). The plastic section modulus Z_y = 316 cmÃÂó.
Related Pages
- UK Steel Design Guide (EN 1993)
- UK UB & UC Section Properties
- EN 1993 Column Buckling
- Beam Capacity Calculator
- Column Capacity Calculator
Educational reference only. Verify all section properties against the current British Steel / Tata Steel section catalogue and BS 4-1 before design. Results are PRELIMINARY — NOT FOR CONSTRUCTION.