Floor in attic

[ChiefJeet]

I have built 2nd floor and a roof with "Ignore upper floor". I have then built the attic walls and designated the roof void as attic space

 

In the section view, the attic area should not have floor but a ceiling platform. Any easy solution to this please?

Floor in attic.plan

[Joe_Carrick]

You need to "Open" the attic rooms and modify the structure tab to eliminate the "floor sheathing".  I'm not sure what you mean that the attic areas need a "ceiling platform".

[ChiefJeet]

1 hour ago, Joe_Carrick said:

You need to "Open" the attic rooms and modify the structure tab to eliminate the "floor sheathing".  I'm not sure what you mean that the attic areas need a "ceiling platform".

The structure between 2 floor is a floor and should use construction specified in the floor structure. The space between the room below and the roof above is a ceiling and should use the construction specified in ceiling structure.

 

1 hour ago, solver said:

You want the attic space to use the ceiling framing from the room below as its floor? Maybe because the joist are different size?

The ceiling joist would have smaller joists sizes.

[ChiefJeet]

Ok. Got it. Can change manually. I thought that it was an automatic process. Thanks both.

[winterdd]

1 hour ago, Joe_Carrick said:

You need to "Open" the attic rooms and modify the structure tab to eliminate the "floor sheathing".  I'm not sure what you mean that the attic areas need a "ceiling platform".

what I would have done too......