Dear Lokesh ,

Every year the JEE Main cut-off for B.Tech/B.Arch basically depends on the following factors;

• Seat Matrix
• No of students appeared for the exam
• Difficulty Level of exam paper
• Previous year cut off trends
• Category under which you want to get admission

you can go through this link to know previous year cut off's in NITs for B.Arch course :

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning

Hope this helps !