Monday, 6 August 2007

Revit: how to dissallow wall join

Question from Nekia Strong.
I am working on an office project that contains a series of vertical penetrations surrounded by a 2 hour shaft wall. We are looking for ways to get Revit to understand that this wall type must be closed off from other walls types. Does anyone know how to unjoin different wall types so that, in plan, they cleanly align and do not try to automatically wrap the finishes around each other? I have tried to simply disjoin them at the corners and keep getting strange offsets and gaps. Also, will the room command still work within a room made of non-joined walls?Please let me know if you know!

Solution by Lee Miller:
To unjoin the wall, it’s easier to grab the blue grip, or the wall end control, and move it away from the connected wall. Once the wall end is not connected, right click on the blue grip and select “disallow join”

Then you align the wall end to the wall without joining it. - Drag wall end to wall.

The wall should cleanup.

Walls with disallowed join are not affected by room bounding. This is a separate wall parameter that needs to be turned off. (Ed how is this done?)


DBaldacchino said...

I guess you're alluding to the "Room Bounding" instance parameter....

It's quite interesting how room bounding works. If you stretch the wall in your example away by an inch or so (leaving a gap), the room still finds the bound, even though the walls are not continuous. Of course if the gap is too much, the room won't be enclosed and a warning is issued and recorded in the Review Warnings dialog.

On the subject of room bounds...curtain walls don't behave the same as walls. Room bounds are determined by the "location line" of the curtain wall. So if you have mullions and panels with an offset (location line on the exterior face), your rom area calculations will be overestimated.

Greg said...

might be too late for this but i highly advice against performing the opporation you're suggesting in you post.

while technically correct it sets you up for a whole lot of work later on... this will need to be done at every intersection like this.

instead i think that you could create an additional drawing and either manually or through the creative use of filters demonstrate to the contractor and/or building official where these interesections occur and generate a detail to explain the situaion

not only will this mean less work for your staff but better understanding of how it is to be constructed in the field