topic Re: Revit Truss family in Revit Structure Forum

Revit Truss family

rahid_mullas — Fri, 08 Mar 2024 03:52:11 GMT

There is a truss family which i created. the end bracings are different and the middle bracings are symmetrical. The end bracings are fine but the middle bracings are going inside each other. I need a formula to avoid the clash. When i say middle bracing, leaving the end bracings everything i am considering as middle bracings. I need forums help pls help me out. i am also attaching a family.

Re: Revit Truss family

Tom_Kunsman — Fri, 08 Mar 2024 17:57:23 GMT

I've never had much luch with trying to make the web members parametric in regards to the length. Yes, I know several of the truss' that come with Revit do have some nested arrays and such.

I think you might be better off creating a truss layout for each specific span that you might need. A certain span can have multiple types.

Re: Revit Truss family

ToanDN — Sat, 09 Mar 2024 02:38:55 GMT

Can you explain these formulas? They don't look right to me.

Re: Revit Truss family

rahid_mullas — Sun, 10 Mar 2024 06:23:35 GMT

@ToanDN So what i have done here is, I have taken initial ratio. for example if there are 2 lengths A=50 and B=100. So B/A = 2. So now if i change overall length i want this xyz element to increase or decrease with respect to 2 ratio.

Re: Revit Truss family

rahid_mullas — Sun, 10 Mar 2024 06:24:40 GMT

@Tom_Kunsman In order to create separate length, the truss template doesnt consider nested families in that case how it is possible?

Re: Revit Truss family

rahid_mullas — Sun, 10 Mar 2024 06:25:15 GMT

I am so sorry to everyone for replying so late. but pls do help me out with this.

Re: Revit Truss family

ToanDN — Sun, 10 Mar 2024 07:16:26 GMT

@rahid_mullas wrote:

@ToanDN So what i have done here is, I have taken initial ratio. for example if there are 2 lengths A=50 and B=100. So B/A = 2. So now if i change overall length i want this xyz element to increase or decrease with respect to 2 ratio.

Your formulas don't look anything like what you explained. What are the meaning of numbers like 15.66416 or 13.975068? How on earth have you come up with them?

Re: Revit Truss family

rahid_mullas — Sun, 10 Mar 2024 09:30:34 GMT

@ToanDN In this i wanted A to move in the ration with the length. so 25000/1596 will give you 15.66 as the ratio. so now if we change the length A will move in the ration of 15.66 with the length. But the problem is array clashed with the other element i need a formula that will maintain its position even when we change the length.

Re: Revit Truss family

ToanDN — Sun, 10 Mar 2024 19:04:29 GMT

If you control A and B, then what is D doing in here? D is given by the number of array, so it is not needed or being a reporting parameter.

Re: Revit Truss family

ToanDN — Mon, 11 Mar 2024 01:15:57 GMT

Try this family. It's 2024.

Re: Revit Truss family

rahid_mullas — Mon, 11 Mar 2024 04:19:12 GMT

@ToanDN I loaded this family into the project and this is what happens. Even i tried to turn of the visibility of the vertical bracing it doesn't hide. your formula is impressive and your method is excellent can you pls rectify this error.

Re: Revit Truss family

ToanDN — Mon, 11 Mar 2024 22:59:47 GMT

@rahid_mullas wrote:

@ToanDN I loaded this family into the project and this is what happens. Even i tried to turn of the visibility of the vertical bracing it doesn't hide. your formula is impressive and your method is excellent can you pls rectify this error.

If I remove them the family will break when the length changed. You would need to manually delete the framing members for those webs.

Re: Revit Truss family

rahid_mullas — Tue, 12 Mar 2024 12:11:22 GMT

So you are saying after loading them into the project i should delete this individual bracing.

Re: Revit Truss family

ToanDN — Tue, 12 Mar 2024 18:33:49 GMT

Yes that is what I am saying.

Re: Revit Truss family

rahid_mullas — Thu, 14 Mar 2024 07:21:10 GMT

Thanks

Re: Revit Truss family

ruby121989 — Wed, 20 May 2026 16:43:16 GMT

plz explain me how to calculate the column rebar no in revit