Re: New Earthquake Regulation 2018 Considering the economic situation in the country, it seems that there will be no job to analyze high-rise buildings for 1-2 years. Since it is not a high-rise building but a public institution, non-linear analysis can be done, however. I do not like the fact that a supervisor gains this right without a technical background, without knowing the basics of the work, just because he has practice. But the weight of the title and academic publication should have been less. Anyway, let me tell you my observations in the market so far. I have built many structures that are over 30 floors so far. I analyzed and designed one of them according to the Istanbul Metropolitan Municipality Tall Buildings Regulation (very similar to TBDY 2018 Chapter 13), which has 50 floors and remains as a draft. All others are designed according to TBDY 2007. To be honest, I definitely used ETABS and SAP2000 in the analysis and design of such structures. Currently, those buildings are standing and in use, I hope they will provide the expected performance in an earthquake. Until now, there was no regulation in force mandating nonlinear analysis. However, some institutions required this work especially in high-rise buildings. I am speaking for Istanbul, one or two professors handled the consultancy part of this business and no one else was working with them. Moreover, they run the software requirement and make it compulsory to use Perform. Those who know Perform know that its user interface is not friendly and it is very prone to misuse. Those who already use it continue the analysis by transferring from SAP2000. Although non-linear analysis is possible in SAP2000, they require this software by introducing the rule "Perform makes it more accurate". However, its only advantage is that it performs fast analysis due to convergence solutions in the methods it uses. Anyway, by forcing this software, they eliminated many project offices and caused that work to shift to the project offices that are already working with them. Those who do non-linear analysis will understand me, it is not possible to check those analyzes intelligently, you can only tell if there is a problem in the main lines. It is very open to manipulation. ideCAD and other native software are working to incorporate nonlinear analysis into their software. Tomorrow, I wonder what kind of attitude they will display towards domestic software in this commission. Even if they do not have a legal basis in their hands, when they say that this software will be used, you have to, otherwise the job will not work. Non-linear analysis is really difficult, I don't know if native software can really do it properly. But even if it does - and I trust the technical team behind ideCAD - it is possible to encounter the hurdle I mentioned above about using it. Especially because of the well-established consultants in some institutions...