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**mdradvies** · April 19, 2011, 01:09 PM

Sorry, but I can't open Inline Attachments, could you retry?

**Alfredo Medina** · April 19, 2011, 01:37 PM

[admin hat on]
Please use Go Advanced > Manage attachments > ... to upload your files. In-line attachments or In-line links are problematic to many users, myself included.
[/admin hat off]

Here is the file, again, as a regular attachment: (saved in RAC2011)

Attached Files

Detail.rvt (368.0 KB, 44 views)

**dalmore** · April 19, 2011, 02:35 PM

Hi Nurlan
Just change your reference lines to "weak reference" instead of "left" or "right" respectively.

**mdradvies** · April 19, 2011, 02:44 PM

Yep, and it's quite easy too (as soon as you know the trick):

Select the refplanes of the with the Reference Left and Right (Слева and Справа) and change the value in the Properties setting "Is Reference" to "Weak Reference". In general, a rule of thumb here that Refplanes constrain the grips more, the stronger they are. There's a kind of hierarchy in them:

Front/Back/Left/Right
Strong Reference
Weak Reference
No Reference

Weak Reference let's you still use the Grips while Strong Reference and the F/B/L/R/C-refplanes will constrain the values of parameters.

**Alfredo Medina** · April 19, 2011, 02:55 PM

Maybe we are understanding different things, but I think that what the OP wants is that by changing the interior height of the object, the thickness of the top remains constant, in the same way as when he moves the interior width towards the outside, the thickness of the legs remain constant. If this is what the OP wants to do, the only change I would do to the family is to make the thickness of the top, a type parameter, instead of instance.

Attached Files

**mdradvies** · April 19, 2011, 03:40 PM

Maybe we are misinterpreting:
The grips on the upper part are working independently from each other: either one you flex gives a different thickness.
The grips on the "legs" work different: the grips on the outside make the thickness flex, whilst the grips on the inside make the entire leg move.

So there are two possibilities here:
1. The top needs to work as the legs, in which case I would suggest to set the interior top refplane "Is Reference" to "Top"
2. The legs need to work as the top part, in which case I would suggest to change the interior side refplanes "Is Reference" to "Weak Reference"

Making a parameter a type parameter is IMHO not quite the right way because this means you would have to make types for all versions with different thickness in the top section.

**Nurlan** · April 20, 2011, 05:05 AM

Thanks for the tips. Yes, I need the top to work as the legs. Make the thickness of the top, a type parameter, instead of instance is not an option.
Change the interior top refplane "Is Reference" to "Top" is not working.

ps: Sorry for my English.

Attached Files

**Alfredo Medina** · April 20, 2011, 07:45 AM

Then, you need to: erase the dimension that refers to the thickness of the top, but leave the parameter in the family, then add a dimension from the reference level to the top of the object, and make this dimension an instance parameter, with a formula = the interior height + the thickness of the top. There is no need to make changes to the reference planes. Just these changes are enough for what you need.

Attached Files

**Nurlan** · April 20, 2011, 10:38 AM

Wow, it works! Thank you.

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