Cutting holes in slabs

[Phileas]

In the project I'm currently working on, I've got a window whose guiding rails are inserted in the concrete slab above. I wanted to know if there was a way to cut a corresponding hole into that concrete slab, without using this tool: , because it cuts through the whole slab, which is something I don't want.

 

Here's a screenshot with the part of the slab I'd want to cut highlighted:

 

 

I know I could create an extrude in the corresponding rectangular shape, place it where I want the hole and use "substract volumes" to get what I want. Then I'd have to assign a fill to the new 3D Object my slab became, so that it still appears as concrete in section views. The problem with that method is that the resulting entity is not a "slab" object anymore, so any reshaping of the boundaries would become quite time-consuming... I wanted to cut that hole without changing the object style.

[Hans-Olav]

Hi

Make the extrude and use the " Subtract 3D object from slab" meny under AEC

[Phileas]

@Hans-Olav thank you very much my friend 🙂

 

[Markvl]

22 hours ago, Hans-Olav said:

Hi

Make the extrude and use the " Subtract 3D object from slab" meny under AEC

This is new as of 2017.  Great feature.  I use it often.

[Phileas]

@Markvl Lucky me I have 2018 lol 🙂 Made my life a lot easier since @Hans-Olav showed me this feature

[Markvl]

It adds a whole other dimension of usability to slabs.