It came to our attention that members are failing in Series 6 while the same passed for strength check in series 5. The equations mentioned here are based on AISC 360. It would be a great help if someone helps to find why these equations are different for same model? The difference talking is almost 50% between the results from both series.
| Member | Series 5 | Series 6 |
| WT beam | H1-1b | H2-1 |