Hello aspirant, hope you are doing good.

So, with your rank, I'm really sorry to tell you that it's not really probable that you will get a seat in NIT Hamirpur, in B.Arch. The cutoffs of NIT are really tight, and there is a lot of competition . The cutoffs are subjected to change , depending on alot of aspects like No, of students who appeared, the toughness of the exam, and the highest marks, but even if the cutoffs change, your rank is not really near that.

I'll suggest you to rather try out for some other colleges that you can get into, with your OBC rank, here:

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you. Good Luck!!