1. The problem statement, all variables and given/known data I have several question regrading with this post . 1.) For BC and CB , we could see that it's far end pinned / roller supported , so , shouldnt be the K = (3/4)(EI / L ) ? 2.) I dont understand how the carry over factor works (in the second picture) 2. Relevant equations 3. The attempt at a solution 1.) I think the K for BC and CB are wrong , it should be K = (3/4)(EI / L ) ,, because at BA, we could see that K = (3/4)(EI / L ) ... 2.) I dont understand for the carry over factor for BA is 0 ... We can see that for AB , BC and also CD , the carry over factor is 0.5 , so shoulnt the carry over factor for BA is 0.5 also ?