topic Re: Floor/Roof/Wall Joins in Revit Architecture Forum

Floor/Roof/Wall Joins

peter.hamilton4NFSX — Thu, 30 Apr 2020 13:41:21 GMT

Good day, everyone. I hope you all will take pity on a poor structural engineer. I'm new to Revit and could use some assistance. This particular question seemed more architectural than structural, so I'm over here in the Arch forum.

I'm running Revit LT 2021 ($100 to add it on to AutoCAD LT seemed an inexpensive opportunity to learn my way around the program), so I know I'm going into some things with one hand tied behind my back.

I'm trying to model a light frame wood building, and looking at the point where the attic floor, roof, wall, and soffit all come together. Is there a way to shave off the portion of the floor that extends above the roof line, cut a birds mouth in the joist, and/or trim the tail of the rafters to be even with the bottom of the soffit? I've tried using the Join command, but it will only keep the outer edges of all of the elements (so almost exactly the opposite of what I want). The Cut geometry does nothing - I might be using it wrong, but all the tutorials seem to point to using with families and voids.

I appreciate any help anyone can offer.

Re: Floor/Roof/Wall Joins

martijn_pater — Thu, 30 Apr 2020 14:27:33 GMT

Have a look at this topic: https://forums.autodesk.com/t5/revit-architecture-forum/ceiling-to-pitched-roof-junction/m-p/9353080#M274257

For using join geometry the materials need to be the same basically, you can have a look here: https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Revit-Model/files/GUID-F3D6884F-F1E3-471B-81FB-ECE93D9C2671-htm.html

Re: Floor/Roof/Wall Joins

peter.hamilton4NFSX — Thu, 30 Apr 2020 14:27:39 GMT

Thanks. Hope you have better luck searching than I did. I've found a few similar questions, but I either botched the implementation of the suggested solutions, or they were based on Revit functionalities not available in LT, like Model-In-Place (only available for walls in LT).

Re: Floor/Roof/Wall Joins

martijn_pater — Thu, 30 Apr 2020 15:08:40 GMT

(edited my earlier post)
ah I see, you should be able to create a line-based or face-based family with void perhaps with LT?
1. new --> family --> generic line/face-based
2. create void in family with the correct angle/section, load into project
3. check "cut with voids when loaded"
4. cut geometry with void family

Would that do the trick with LT? If it's not clear let me know.

Re: Floor/Roof/Wall Joins

peter.hamilton4NFSX — Thu, 30 Apr 2020 15:07:23 GMT

Thanks. I'm in the process of doing that now, actually. Though I used Generic Model and not face based, so it isn't quite working. I'll try again with that family type and see what happens.

Re: Floor/Roof/Wall Joins

martijn_pater — Thu, 30 Apr 2020 15:21:02 GMT

Generic model should work aswell, it is the same really. Probably you would need to check "cut with voids when loaded" when editing/creating the family.

"cut with voids when loaded"

Re: Floor/Roof/Wall Joins

peter.hamilton4NFSX — Thu, 30 Apr 2020 15:25:14 GMT

The shear number of settings and check boxes in this program is mind boggling.

Thanks for your help. That did it. I was able to select the floor as the host for the void family and then use the cut geometry tool (select the floor -> select the edge of the void family) and it did the job wonderfully.

Re: Floor/Roof/Wall Joins

martijn_pater — Thu, 30 Apr 2020 15:42:20 GMT

@peter.hamilton4NFSX wrote:
The shear number of settings and check boxes in this program is mind boggling.

Just another workflow to get used to mostly I suppose, but considering you already considered using a void family yourself I'm guessing you'll do fine... 🙂