Roof Structure

[goulnazarianh]

Hi Everyone
Could you please help me with creating a normal "Roof Structure in Revit" I'm trying to show the wooden construction Plans / Sections etc. Do you know any tricks to construct an accurate Roof Structure? I will upload some photos to show you what I did exactly but in my option it's really childish to represent it that way. I'm trying to have Normal "Rafters" joined with "Ridge Boards" and then I wanna add the "Purlins" to it to show that it's holding the Rafters and I want it to be connected with the "Wall Plate". I had to use base offset for the Roof to connect the Rafters to the Wall Plate.RepresentationBad Joints / No JointsBad Rafters on the corners(And it's Angled, it's not 90 Degree)Rafters not connected with Wall PlatesBase Offset is used to connect the Rafters with Wall Plates

[barthbradley]

I'm not sure what you are asking, or what method you used to create your rafters. Are you using Beam Systems? 

[goulnazarianh]

I'm trying to create Roof Structure in Revit, Wooden Roof Structure and yes I used "Beam System" but as you can see the joints are not joined there are a lot of mistakes in it so my question is... How to build Wooden Roof Structure in Revit? very detailed Wooden Roof.

[barthbradley]

I don't know what you mean by "the joints are not joined ".  That's not Revit terminology or framing terminology.  On top of that, it doesn't make any sense because you haven't put into any context.  Regarding "how to build Wooden Roof Structure in Revit"; this is way, way too broad of a question.  The answer wouldn't fit into a book, much less a single post or a thread.  It looks to me that you are trying to model the roof framing as it would be built in the field. Are you familiar with what you are trying to model? In other words, do you know how a rafter roof is actually framed in the field? Are you familiar with the three crucial rafter cuts? The ridge cut, the tail cut and the bird's mouth cut, where you notch the rafter to sit on the top plate?  

Bottom line: I need more information and context to be able to answer your specific question.  

[constantin.stroescu]

if you use Revit 2017 or previous versions you will be able to do it by using Revit Extensions-Modeling.

These extensions can be get from  Autodesk Account and it is a quite good tool...you can see it from my rough screencast how it works.

https://knowledge.autodesk.com/community/screencast/c50626a8-b5e9-49d8-9724-c9d14f86de07

If you use a newer version of Revit - from Revit 2018 up...then you are stuck ...

Have a look at this article : https://blogs.autodesk.com/revit/2018/09/19/updates-to-revit-extensions-for-timber-and-rebar/

You have suggestions how to proceed for solving the problems... no free versions , even if they say otherwise...I downloaded AGACAD Lite versions ...I was able to use it for a while , and that's all...

Have another look to this previous post from the the forum:

https://forums.autodesk.com/t5/revit-structure-forum/revit-extensions-for-revit-2019/td-p/8168519

That is one of the reasons that I use mainly the Revit 2017 version till today!

[goulnazarianh]

That's very sad to hear cause I'm using Revit 2018-2020 and I'm kinda stuck with the roof Construction, when you have complicated Roof Structures it's not easy to Model it one by one but I guess I have no choice except modeling it.
Thanks for you Answer sir!

[goulnazarianh]

I will ask my question one more time and I hope you will get what I'm trying to ask, basically I'm trying to have a "Wooden Roof Structure in Revit" and not just "Solid Empty Roof" do you know how to build it in Revit? I don't want it to be very detailed like you mentioned  it (Are you familiar with the three crucial rafter cuts? The ridge cut, the tail cut and the bird's mouth cut, where you notch the rafter to sit on the top plate?). And about the joints you said I don't know what you mean by "the joints are not joined ". What I mean is I want them to be joined together to look Normal and not far from each other and if you pay attention each of them is set differently so "Beam System is not doing it's job Correctly". I will provide you with more photos so that you will know what I mean Exactly. Hope this information will be enough.Look how they are joined Perfectly and Equally This is what I'm trying to achieve.The second Roof is what I'm trying to Achieve look how clean the joins are drawn here and compare it with the left Roof and look how bad it looks and Unequall. The left one is Drawn by "Beam System" & the right one is drawn by "Model in Place".Even if I extend them they won't be joined and they are not even equall.This is what I'm trying to have but I made this by "Model in Place" in case if we have a very complicated Roofs it will be very hard to Model it so I'm trying to find a way to do it. (Just a Reminder) I don't wanna have a very detailed drawing this much detail is enough for me no need for that "Bird's Mouth Cut".

[barthbradley]

How do you want to attach your Jack Rafters? 

[bin]

You can try this:

Model 5 columns in your model, one at each corner centered in the wall core, and one in the center of the room(roof). Attach top to the roof. 
Then create rafters and top plates(structural framing) using 3D snap to the top points of the column. Use the Z justification if required. 

The  next step is to create the beam system for the joists. Before creating each beam system, you will need to pick a work plane. You can pick the face of the roof.   Or you can create a joist from the center point of the wall plate to the top point of the column, then pick the top or bottom face of the joist. 

Now you have the work plane picked, just need to pick the edge using pick beam(forgot the name, not pick line, similar to pick wall).  Pick the joist, the rafter and the wall plate. ( rafter, rafter and wall plate if you are using the roof as work plane)

Once all done, you can adjust the Start or End extension something to adjust the length(never drag the point). Or just drag the shape handle(blue triangle). Then you can use the Notch tool to join them. 

After you finish everything, you can demolish your columns to make them temporary. 

I think it should work. Its Sunday morning and I’m still in bed. Please let me know whether it works or not. Thanks. 

[barthbradley · Accepted solution]

Personally, I would just cope the jacks at the hip rafter and zero out the coping distance.  

...or use SST LSU Adjustable Rafter Hangers and leave 'em be.  😉

...or, if the OP's got $4000 laying around, purchase StrucSoft software.  It'll knock this out in no time.  

[bin · Accepted solution]

Yes you are right, what is notch? I was talking about Coping.... That's why I should not reply in bed.

Can I edit my post?

[barthbradley]

I don't get your columns approach.  Can you post a picture showing what you mean? 

BTW: Simpson LSU4.12:

https://www.strongtie.com/facemounthangers_engineeredwoodconnectors/lsu_hanger/p/lsu#Drawings

Just having some fun here.  

[bin · Accepted solution]

A quick one:

[goulnazarianh]

Thanks for your explanation Bin, it's a great way to explain it by video and it helps us to understand better.
I hope in Revit 2021 they will make this come with the roof automatically or add one additional roof with Wooden Structure so it becomes more accurate and easier.

[barthbradley]

I wasn't kidding about StrucSoft BIM Framing Software. It could be a worthwhile investment for you.  You may want to look into it.  FWIW. 

https://strucsoftsolutions.com/ 

[bin]

I agree that you should have a look at some professional tools as @barthbradley mentioned if your main work is to model roof structures.

Of course, knowing some basic Revit structural staff will help you too. Good luck.

[goulnazarianh]

Well it is but c'mon it costs 7,160$ ~ 7,200$ as it is mentioned in Google.

A standalone license costs $5.985.00 plus a subscription cost of $1,175.00, which is required at purchase.

So I'm ready to model everything by my self than to spend that much money on small projects. such as Private Houses or Apartments etc.

[barthbradley]

Are you just modeling the framing for fun/learning, or for documentation/coordination?  

[goulnazarianh]

When I was at University some of my Supervisors were telling me to show this details so that it will be visible in the Section View and I had no idea how to do it, and now I heard that in Architectural Offices showing it is a must in order to build it. Thankfully I'm working in a Design Studio so I don't have to do that but I was wondering just in case if I needed one day how I'm supposed to build it, that's the reason. Besides all of that I like to Draw and show all of this details cause it really helps your Section Views and Renders to look cool!
Thank you for your help everyone!

[martijn_pater]

I think maybe you could just use refplanes to cut the structural framing elements.