runway slope requirements
good day
are there any minimum requirements about runways and minimum clear area for approach and go-around .
there is an situation where owner of private jet wants to build an airfield for his plane but problem is that the region is mountainous and I just wondering if he build small airfield with concrete runway his operations on it will be legal.
Let's say that approach path will be 5 degrees and his plane will met this requirement and go-around will be with gradient 6 and plane also met this requirement.
Maybe there are some maximum limits about slope over which airfield can't be registered ?
thank you