Min and max length

[Mikeymore]

A lot of posts on this subject, but I can't get it working.

I have a family with a param length.

Now I want to give it a min and max value, but I quite don't understand the steps in Revit to do this....

The formula I found in posts is clear, but I don't know how to make the e.g. max_length contraint in Revit.

Can someone explain in short steps how to do this?

Thanks in advance!

[barthbradley · Accepted solution]

something like this?

Or, you could do it like this, where the user types in the Max and Min Length, as well as the Length:

[Mikeymore]

Hi, Thank you very much for the quick reply !!!

That's just the explenation I needed, with this my model works like I want to do !!

Thanks again 😀

[Mikeymore]

I have 1 question left: I made the max-length a param measurement with a formula, that works great!

How can I give the value of the length input? I can change it in the family input, but not in a project.

The box length doesn't appear in the type properties when loaded in a project?

[barthbradley]

I don't get it. Post the file. 

[Mikeymore]

Sorry, my mistake. It works!

Didn't update the file save....

[Mikeymore]

Only thing is that the thickness and length are not visible in schedule lists.

Is that because of the type of param (must it be an instance or something)?