cut band or fill band expression

[mka1761975]

I want to make band cut and band fill
but with this expression
profile 1 minus profile 2 minus 53 cm
that means I want the difference not to design I want the difference between ngl and subbase

[Jeew-m]

Dear Friend,

You can create a copy of the lower profile and reduce it by 53cm. Then you can use this new surface for bands. Or else you can lower the bottom surface by 53cm and use it for bands.
Thanks

[mka1761975]

I have in one dwg 61 roads and design of them every time change and many of engineers work on it so I want it as an expression not to lower or up or copy