Stair with 2 widths

[WendyWelton]

This is probably a very easy problem - and I'm sure people do this succesfully every day, but I'm stumped.

The problem: I need to do a straight stair that's wider on the bottom half that the top half.

What I've tried:
- When I put two straight segments against each other, they merge and give me only one width.
- When I put a little landing in between them, it doesn't recognize
the two stair segments as part of the same stair, and therefore doesn't figure the rises correctly, unless,
- I make the landing a trapezoid, so that the full width of the landing contacts the full width of each stair segment. This makes Chief recognize the stair as one, but then I get weird 3D, like the edge of the landing showing through the wall...

What's the best approach for this?

Thanks in advance,
Wendy