Adjacent sloping floors - Edit Cut Profile is not enough

[CAD Monkey]

I am building site work and sloping roofs for drainage. Sloping objects with arrows and using edit profile to allow angles in section works, but only if the object is not adjacent to another object.

Is there a way to slope a floor and create a 90 degree triangle that would allow a join to other objects that are not at the same angle?

[PeterJ]

I seem to recall using the ramp tool to achieve this, though I can't remember how I made it work.