Groups and Attach/Detach Base

[NILANJANAKTGJY]

Hello, I am new to Revit, and had a doubt about attach/detach base when modelling a multistory housing.

-I have grouped all my walls and floorslab into a single group and copied it to select levels

-When I edit one group's walls to attach to the floorslab above, it is not reflected in the other groups, meaning I have to manually attach all the floors/walls? Is there any workaround for this?

-One way I thought of is that I can change the top offset constraint of the wall to the slab thickness, but in a real project, not all slabs will have the same thickness, so each wall would have to be set with a different top offset constraint? Which also seems like a lot of work.

Help would be much appreciated, thankyou! 

[RC_RVT · Accepted solution]

If all the levels are at the same height (e.g. 3000mm), then select all the walls in the group and change the top constraint to unconnected and then in the unconnected height box, put the required height for the wall (e.g. 2800mm).

[NILANJANAKTGJY]

Thank you for your reply, I ultimately did this only. 

[Sleepingfish_Kuo · Accepted solution]

I don’t really agree with the previous reply.
‘Unconnected height’ basically means ‘forgot to set it.’
I recommend setting the wall height to something like ‘[target level] - 200mm.’
That way, when the level height changes, the wall height will adjust accordingly.

Or another way to solve these is to group the wall and the floor above it, not the below one.

When I have beams or floors with different thickness, I won't want to cut each wall to many pieces.

[NILANJANAKTGJY]

Thank you for the solution

[arq_42 · Accepted solution]

Another approach, for specific cases.

You can put reference planes (name them) inside the group and link the walls to that planes.
For example, to link the wall to the staircase, you can draw the reference plane under the staircase.

Reference planes will copy with their group and walls will maintain attached

[NILANJANAKTGJY]

Oh this is a very helpful suggestion, I didn't even think about the staircase situation. Thank you so much!

[arq_42 · Accepted solution]

Remember! This is a situation to be used with caution, because too many reference planes can slow down the model or cause modeling errors due to having too many snap points.