https://community.graphisoft.com/t5/Licensing/Skylights-on-pitched-roof/m-p/228359#M721 <DIV class="actalk-migrated-content"><T>Hi there, <BR /> Hope someone can help. I have been trying to work out how i can accurately place a skylight on a pitched roof with has a flat ceiling below. The only way i can see is creating a cut out in the slab. This is proving extremely time consuming and frustrating! I also cannot seem to get it just right, measurements are always out. I have attached a screenshot to explain what i mean. Essentially i want to 'box in' the skylight, but struggling to find a suitable way to do so.<BR /> Many thanks.</T></DIV> Thu, 25 May 2023 16:05:51 GMT Anonymous 2023-05-25T16:05:51Z https://community.graphisoft.com/t5/Licensing/Skylights-on-pitched-roof/m-p/228359#M721 <DIV class="actalk-migrated-content"><T>Hi there, <BR /> Hope someone can help. I have been trying to work out how i can accurately place a skylight on a pitched roof with has a flat ceiling below. The only way i can see is creating a cut out in the slab. This is proving extremely time consuming and frustrating! I also cannot seem to get it just right, measurements are always out. I have attached a screenshot to explain what i mean. Essentially i want to 'box in' the skylight, but struggling to find a suitable way to do so.<BR /> Many thanks.</T></DIV> Thu, 25 May 2023 16:05:51 GMT https://community.graphisoft.com/t5/Licensing/Skylights-on-pitched-roof/m-p/228359#M721 Anonymous 2023-05-25T16:05:51Z https://community.graphisoft.com/t5/Licensing/Skylights-on-pitched-roof/m-p/228360#M722 The ceiling slab is not related to the roof, so yes you will have to manually cut the hole in the slab.<BR /> There are techniques to cut the hole in the slab but use the roof plane as your editing plane and project the hole onto the slab.<BR /> So effectively you are picking points on the roof (the extents of the sky-light) and you are cutting the hole in the slab - projecting vertically or perpendicular to the roof.<BR /> <BR /> The Help Center arcticle may help.<BR /> <BR /> <A href="https://helpcenter.graphisoft.com/user-guide/76363/" target="_blank">https://helpcenter.graphisoft.com/user-guide/76363/</A><BR /> <BR /> Scroll down to the sections for "Pick Plane Example" &amp; "Projection onto Editing Plane".<BR /> <BR /> I am sure there was a good movie explaining this when the feature first came out.<BR /> Maybe in the Archicad YouTube channel?<BR /> If I can find it I will post a link.<BR /> <BR /> Barry. Wed, 29 May 2019 01:10:57 GMT https://community.graphisoft.com/t5/Licensing/Skylights-on-pitched-roof/m-p/228360#M722 Barry Kelly 2019-05-29T01:10:57Z