Hi Cecil,
Thanks again for your help with the earlier post about window/sliding door pillars and sha qi.
In many places one can find guidance regarding "stairs at the center of the house".
In the most obvious case of #8, it's unambiguous that this is the "stairs at the center of the house".
What I am unsure about is the remainder of these cases, some of which such as 1, 2, 6, 7, 9, 10, and 14 are possible to interpret as "stairs at the center of the house", whereas others are more of a stretch to consider as being at the center.
note: the black lines are simply to illustrate the centers of each house. I just drew them intersecting through everything because I was in a hurry