New Concrete Slab over existing Slabs

[octavio2]

Will like to know what is the best "flexible" way to create a concrete new floor slab that is going to be poured over an existing concrete floor slab in renovations where a new floor or slab height is needed. 

The new slab will be poured over an existing interior concrete floor, so in this case, being an interior slab, the new slab will be of the same thickness in its entirely. 

The family (or floor type?) will also be used for purings over exterior sloped concrete slabs of areas that will be covered with new roofs in the renvations.  The existing exterior slabs slope sligthly, and the new slab will be an interior slab to be poured over the sloped slab below, so that is why the family or floor type needs to be flexibe to change in thickness as the location or condition dictates.

Thanks in advance.

[maciejwypych]

Hi,
The most flexible way doing this, is just to join the existing slab to the proposed. The proposed slab needs to be at least as thick as the distance between the lowest point of the existing floor and the finished slab level.
This way the existing slab will cut out the overlapping volume out of the proposed one.

[Alaaeldin_Alsahli]

Hi Octavio

As (maciejwypych) mentioned you need to join the roof with the sloped slab where also it needs to be at least as thick as the distance between the lowest point of the existing floor and the finished slab level.

But in case you the distance is not Satisfied with the thickness, you need to use another Roof. 

Here is a video that shows the thickness issue and how to work around it.

https://screencast.autodesk.com/main/details/beb113d8-5782-4046-b3ec-dfb6ad32f4cc

Please let us know if this answers your question

[gustavomello]

Why not use "modify sub elements" on a floor instead of this workaround? And why to use roof instead of floor?

Sorry if i have missed something.
Gustavo