Create a Trihedral (Pyramid Tringle) in Revit

[Anonymous]

Hi,

I am very new in using Revit and need to create a 3d Trihedral (Tetrahedron)  in Revit, is there any mass sample for it to share with me? Or any clear guidance to create it?

Thanks,

Zahra 

[barthbradley]

Are you talking about this:

Diagnostic Tripod-1 point.rfa  in the Mass Folder of your Library. There are 4 types.  

[Anonymous]

Hi

Thanks for your reply.

I am looking for this shape, I have the 3d model of the bridge, and want to add the 3d model of the trihedrals.

Thanks,

Zahra

[barthbradley]

You need to model it yourself. That's not a "stock" component. Either as a Loadable Family or In-Place Component (or Mass).  

[hmunsell]

you can use a swept blend to do make a 3D triangle.

• Component > model in place
• pick a category
• pick swept blend
• in an elevation, set the path for the shape.
• give a base shape
• give a top shape (really small version of base shape)

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2019/EN...

[constantin.stroescu · Accepted solution]

...several other ways that could be used in order to achieve your purpose:

1. using Mass family - two methods shown in my screencast
2. or even using a very thin Roof by Footprint with Modify Sub Elements

1. 

https://knowledge.autodesk.com/community/screencast/9e4e805e-761f-42b7-981f-2dc0ec1ba090

2.

https://knowledge.autodesk.com/community/screencast/c90b490b-c36a-4c6b-9435-041daba74434

1.

[barthbradley]

is this what you are trying to model?

See the attached RVT. If it is what you are after, I'll clean it clean it up. It's pretty much fully parametric, but needs a few additional constraints.  

...play around with different "W" Values.  For instance, try 4'-0", 5'-0", etc.   

[constantin.stroescu · Accepted solution]

..and what I think to be a more elegant solution is to use:

• Component Model in Place > Generic Models >Sweep - as shown in my following screencast:

https://knowledge.autodesk.com/community/screencast/67f2682d-a878-474d-b9cc-a739b9e53852

[barthbradley]

ooh, I see now! I thought the OP was showing a  rhombic triacontahedron - a polyhedron built around the dodecahedron.  (he, he)

groovy Trihedral/Tetrahedron, @constantin.stroescu. 

😎

Turn on, tune in, drop out.  

[Anonymous]

Hi constantin.stroescu,

Awesome, Should be very helpful, I am going to test it now.

Thanks very much for your prompt help.

Zahra

[Anonymous]

Hi,

Thanks for your solution, It worked, but sounds  constantin.stroescu's solution is more reliable.

Regards,

Zahra

[Anonymous]

Hi Constantin,

Could you please advise me how I can remove the base plane of the trihedral? to be seen like attached picture.

Thanks,

Zahra

[constantin.stroescu · Accepted solution]

you mean to make only the 3 side faces but not the base face?

If this is what you want, then from my previous posts:

1.using Mass family - two methods shown in my screencast  

• simple create only 3 faces from side edges or erase the base face(the method with Reference Points)
• erase the base face for the second form
• you can also create Wall/Roof by face selected these 3 faces

2. or even using a very thin Roof by Footprint with Modify Sub Elements

• make a Roof by Footprint with slopes , unlike in my video where it had no slopes

As for the Component Model in Place it can be done by changing the Profil into a thin Trapez instead of a triangle.

[Anonymous · Accepted solution]

Hi Constantin,

Many thanks, it worked very well.

Regards,

Zahra

[Anonymous]

Hi Constantin,

Sorry, it's me again! Many thanks for your kind support.

I've made the trihedral model as a family using your "Component Model in Place" solution and loaded it to the 3d model of my bridge. Now the orientation of the trihedral should match to the reality, I have the angle between side-planes and the West/East plane of the bridge, and  the angle between the base-plane and the horizontal. For making the first one, I defined a reference plane in the one of the floorplan views with a right angle w.r.t the bridge East surface and then pick that reference plane for the trihedral, so you can see the results in the attached pictures (floorplan and east elevation view of the bridge project).  But, my issue is orientation of the base plane w.r.t the horizontal. Could you please advise how I can set this? I tried rotation in the south elevation view, but sounds it doesn't do what I need. 

Thanks,

Zahra

[Fred_Schreck]

Hello,

I've been researching this question as well.  I was able to create a trihedral using an extruded triangle, a void sweep along the hypotenuse of the triangle, and some trigonometry.   The family is attached.