dynamic view cuts

i want to create a dynamic view using the front/cut and back

the reason for this:

Front cut just below the ceiling,

the cut, difine the cut in a heavier line weight (or stronger colour)

Back all set to broken line (st=2)

the only problem is the back, overrides the rest.

does anyone know a way around this problem

the only way i can see is create a separate DV for the beams.

i would prefer not to do that because the are very large files