i want to consider the friction losses at struts and over piers so i used ( PEXT ) to consider friction losses and slip losses of external cables so the force of cables must be different before and after the strurs and pier location ( this is continuous cable ) but after anaysis the force difference is very small and this is not logic
so i need to know it is necessary to modeling the cables with curvature before using ( PEXT ) or my modell as above correct to consider friction and slip losses