how to create the drop under column at raft footing?

[ammer]

hello dears
I have a building consisting of 12 floors with a basement used for hotel
When the optional base type of the mat was the thickness that are resistant to punching force 110 cm and this expensive kind
I want to use the mat reinforced thickness of 50 cm and a thickness of more than the cast-under columns by 110 cm, and the dimensions of 2 meters by 2 meters
How are represented?
Thank you

 

[ammer]

we need your advises

 

[sereze]

As far as I know what you want is not possible in İdestatik. In my opinion 110 cm. raft is OK for 12 storey hotel. If you lower the thickness of the raft, your reinforcement steel bar quantity will be higher to bear the moment. So 50 cm raft against 110 cm raft might not be cheaper. First option I can think with Idestatik capabilities to make 110 cm high beam foundations first then place slab(raft) in between them. Using bigger columns at the basement also works against punching force.

 

[Meraklı]

hello dears
I have a building consisting of 12 floors with a basement used for hotel
When the optional base type of the mat was the thickness that are resistant to punching force 110 cm and this expensive kind
I want to use the mat reinforced thickness of 50 cm and a thickness of more than the cast-under columns by 110 cm, and the dimensions of 2 meters by 2 meters
How are represented?
Thank you