Maybe you can ask to Michael a swwep + orientation of object :)
Seems you must segment the rails for use sweep as show folowing image :)
or maybe someone will find a trick in one pass :)

Rail Revolve can help but alas works only in only a plan
cool for the angles but not for your inclined+ plan rail :(
Extrude along a path can help but problem at the angles :(
Array along a curve also (but some profils can be kill after but problem at the angles :)
But any make the entiere in one pass

Thanks for Reply!

I want model the stair string of a stairway with multiple floors. It would be nice if I can sweep the profile in one pass :)
But your trick works also fine.

Cheers!

make one floor and use after the functions Array :)