Because for a pitch comes out the roof correctly with the wooden joists that I made with

[Giovannino60]

Because for a pitch comes out the roof correctly with the wooden joists that I made with: Design, Extra flap, Roof maker, Guided roof creation;instead the other flap the n. 1, do not the joists come out? Because the joists do not emerge downwards but are incorporated into a volume, what should I click to make them emerge, like a normal roof with wooden joists?

Thank you