Hello i_trofimov,

When you say 'Concrete slabe', i suppose you speak about precast concrete slab.

If you use a standard version of Allplan, you can use some special component Inside the bonus tool as you said.

You can also create 3D volume with the modeleur. You won't be able to add Inside the existing Library in the Bonus Tools / Concrete construction.

But you can easily save them in your office Library and use them as much as you want.

Using the 3D modeleur is realy fast.

You can also use or create some python part with the 3D definition you need.

Or you can import an IFC model if it's done in Archicad if you want.

At least if you have to do a lot of project like that, than you can also have a look on our Precast solution. It's only depend on the quantity and what you would like to have as result.

Bye & Good Use!