https://community.graphisoft.com/t5/Modeling/Headroom-as-a-boolean-object/m-p/254292#M177527 You could try it yourself: use the Solid Element Operations Palette and use the stair as Operator and the slab as Target, then you will see if it works. I I cannot try it myself, because I'm not at my computer at the moment. Mon, 22 Oct 2018 18:14:04 GMT Laszlo Nagy 2018-10-22T18:14:04Z https://community.graphisoft.com/t5/Modeling/Headroom-as-a-boolean-object/m-p/254291#M177526 <DIV class="actalk-migrated-content">Is it possible to use the headroom-figure to make a hole in a slab?<BR />[attachment=0]headroom.png[/attachment]</DIV> Tue, 05 Aug 2025 09:00:04 GMT https://community.graphisoft.com/t5/Modeling/Headroom-as-a-boolean-object/m-p/254291#M177526 Kamelite 2025-08-05T09:00:04Z https://community.graphisoft.com/t5/Modeling/Headroom-as-a-boolean-object/m-p/254292#M177527 You could try it yourself: use the Solid Element Operations Palette and use the stair as Operator and the slab as Target, then you will see if it works. I I cannot try it myself, because I'm not at my computer at the moment. Mon, 22 Oct 2018 18:14:04 GMT https://community.graphisoft.com/t5/Modeling/Headroom-as-a-boolean-object/m-p/254292#M177527 Laszlo Nagy 2018-10-22T18:14:04Z https://community.graphisoft.com/t5/Modeling/Headroom-as-a-boolean-object/m-p/254293#M177528 I already did, but as i select the overhead-figure, I also select the stair. And doing a boolean operation just removes the footprint of the stair.<BR /> <BR /> Just wondered if there were any clever tricks to accomplish the task.<BR /> <BR /> Thanks anyway!<BR /> <BR /> .Kamelite Tue, 23 Oct 2018 15:52:07 GMT https://community.graphisoft.com/t5/Modeling/Headroom-as-a-boolean-object/m-p/254293#M177528 Kamelite 2018-10-23T15:52:07Z