Doug_N

Double Floor being created

Recommended Posts

I have a strange problem with a file created by one of my clients.  Not that the client created the problem, it may have been something that i did, but I can't for the life of me figure out what is going on here.

 

If you click on one of the rooms at the back of the house, ( Raised Floor or Kitchen) then click on "generate framing" There is a double layer of floor joists and rim joists.228798890_FloorPlan.thumb.jpg.6b2f1686c928810931af2c5cfaed2868.jpg218173846_DoubleFloorJoists.jpg.814930558aef6aa66af5ee2127d34eec.jpg

 

Does anyone know why this is happening and how to stop it?

Floor_Problem.zip

Share this post


Link to post
Share on other sites

Didn't open the plan - clients almost here. Check your floor structure dbx. There may be two framing layers in the floor structure.

  • Upvote 1

Share this post


Link to post
Share on other sites

Checked the dbx and there is only one floor.  

Share this post


Link to post
Share on other sites
9 minutes ago, Doug_N said:

Checked the dbx and there is only one floor.  

Was the floor manually changed leaving a double floor thickness?  What is the ceiling below set at?  Could it be 8” joists and 8” rafters?

Share this post


Link to post
Share on other sites
2 minutes ago, rgardner said:

Was the floor manually changed leaving a double floor thickness?  What is the ceiling below set at?  Could it be 8” joists and 8” rafters?

No, I don't think so.  If you click on the joists, both layers are listed as floor joists.  

Share this post


Link to post
Share on other sites

Delete all your floor joists and tell it to rebuild them.

Share this post


Link to post
Share on other sites
2 minutes ago, javatom said:

Delete all your floor joists and tell it to rebuild them.

I have tried the simple things, including your suggestion.

 

In fact, to simplify the model I erased everything but one area of the building to get rid of any possible interference from other things.  

 

After each change, I delete all framing and regenerate.  Every time two layers of floor joists appear.

1332277554_DoubleFloorJoistsOrtho.thumb.jpg.b47ea1e5feb9d8138c8c897c52de33db.jpg

Simplified.zip

Share this post


Link to post
Share on other sites

Your floor structure has 2 layers that are both defined as framing material.  Change the subfloor to a non framing material.

Share this post


Link to post
Share on other sites

 

7 minutes ago, Alaskan_Son said:

Your floor structure has 2 layers that are both defined as framing material.  Change the subfloor to a non framing material.

 

Michael, 

You nailed it.  This is how it was set up.  

 

351453149_FirFraming.thumb.jpg.93c968e6b0854be50efc2be65bc33234.jpg

 

Amazingly, even though it lists the TOTAL assembly assy at 8 1/4 inches, it made TWO layers at 16 1/2"   I kind of think this is a bit of a gotcha.

 

Here is my dbx following your comment

 

1206724199_PlywoodplusFraming.thumb.jpg.5e0c210de9b8066b7d1408e37d9df9d4.jpg

 

Should this be reported as a bug?   It seems like a bug to me.  

 

In any case, erasing all framing and regenerating creates a floor with only one layer.

 

I now have significantly less hair than I had this morning

 

Thanks Michael.

 

Doug

 

Share this post


Link to post
Share on other sites
15 hours ago, Doug_N said:

Should this be reported as a bug?   It seems like a bug to me. 

 

That's really up to you whether you report it or not but I say not.  It's actually the joist direction arrow that's causing the problem but I think it's working as designed.  By default, that arrow is initially created using the uppermost (3/4") framing layer.  When the Depth was changed in the Joist Direction Specification dialog, it automatically adjusted the thickness of the upper joists to suit.  It may be behaving unexpectedly, but it was some faulty settings that really caused the problem in the first place.  Had you actually wanted a 3/4" thick furring layer, it would have worked just fine had the joist direction arrow not been changed.

Share this post


Link to post
Share on other sites

Well, I don't think that the joist direction symbol had anything to do with it because the double floor problem occurred prior to my using joist direction.  I did the joist direction in an effort to track down what was causing the problem (not very successfully as it turns out.)  But the joist direction tool did offer me a clue by indicating a silly joist value.

 

In any case, maybe one of the tech staff will read this thread and offer an opinion. 

Share this post


Link to post
Share on other sites

Sorry, I should’ve clarified… It’s the joist direction arrow that was causing the thickness that did not add up. Without the joist direction arrow change you would still get 2 framing layers but they would have been the expected thickness.

Share this post


Link to post
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now

  • Member Statistics

    28448
    Total Members
    9156
    Most Online
    Burtonmadness
    Newest Member
    Burtonmadness
    Joined