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Exterior Wall with Exposed Floor

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Message 1 of 3
adam
3392 Views, 2 Replies

Exterior Wall with Exposed Floor

I've done a search. Found  Previous discussion here but it stops short. You'll see I describe the problem and what happens after the change is what I am still looking for a solution for.

 

I am currently modeling a 2-Story Home. I have everything modeled the way I want it, but when I go to the elevations I see a gap where the siding and the sheathing don't touch between floors.

 

My exterior walls:

  1. Core: 3 1/2" stud + 1/2" Sheathing
  2. Exterior: Air Barrier + 3/4" Siding
  3. Interior: 1/2" Gyp Bd

My floors: Main:

  1. Core: 3/4" Sub-Floor + 11 7/8" TJI + 1 1/2" Rim-Joist
  2. My Floors: Second
  3. Core: 3/4" Sub-Floor + 11 7/8" TJI

The floors are modeled to the stud to allow sheathing and siding to extend. I knew of this situation beforehand because tutorials on the interwebs say this is the way to combat your problem:

I go into the my exterior wall, select edit type, edit structure, (set preview to section) select siding, and then zoom in on the bottom of the wall in the section preview. The bottom of the siding highlights and a "unlock" toggle appears. I unlock it. I do the same to the sheathing.

Then I go to my elevations, cut a section, and zoom in to extend the sheathing and siding...

 

Side Bar: Why don't the two extend independently? They should. 

 

To the top of wall below.

 

I'm golden! At least I thought.

The wall joins are all JACKED now!

 

So I go back into edit the wall type. Lock the sheathing and siding ends (just like I did above). And the wall joins are back to normal!

 

BUT

The floor is back to exposed.

Proposed Work Around:

  1. Create a stacked exterior wall for the Main Floor: Edit my existing exterior wall and add a 1 1/2" Stud (will represent the Rim-Joist in section) + 1/2" Sheathing + 3/4" Siding. Create and Exterior 1 1/2" + 1/2" Sheathing + 3/4" Siding to infill walls below Second Floor where I don't have Main Floor wall stacked.
  2. Seperate and create just a 3/4" Sub-Floor. This way I will be able to extend the sub-floor seperatly under the stud walls in sections.

What do you think? I want you to comment on the Proposed Work Around, will it work? What is your experience, what works better?

2 REPLIES 2
Message 2 of 3
rosskirby
in reply to: adam

First of all, thank you for the thorough explanation.  Much better than "my walls don't display correctly, please help."  

 

Note to all other posters: follow this model when posting your questions, you'll get better responses.

 

Now, on to your problem.  My guess is that your wall joins are jacked because the base extension distance for each is slightly off.  Select each wall, and make sure that in the properties for each, the base extension distance is identical.  If you select two walls, and there is no data in the base extension distance, then they were unequal. (Also, I agree that elements within a wall should be able to be independently unlocked and extended.)

 

Rather than creating a stacked wall, I would create a single wall that extends over both floors, and when you're creating the floor, choose "Pick walls" and check the box in the Options bar for "Extend to core", and then, when you're done with sketch mode, you'll get a message asking if you want the floor to cut the wall.  Select "Yes" and your sections should look right.  You may need to manually add the rim joist, either as a modeled beam or as a detail component.  If you're doing material takeoff, I'd go with modeled beam; if not, a detail component will suffice.

 

Using a single wall should avoid the base extension distance problem, and it's faster to model.  If you're set on using two walls, go to your elevation and try to join the walls.  Stacked walls will do something similar, but until you've worked with them for a while, can be kind of a pain.

 

Hope that helps.

 

 

 

 

Ross Kirby
Principal
Dynamik Design
www.dynamikdesign.com
Message 3 of 3
kathryn.langan
in reply to: rosskirby

I just wanted to pop in and add that you might be able to get the wall joins to look right following the layer unlock process if you edit the joins and set them to a miter. Not sure if that helps, but just wanted to throw it out there.



Katie Langan
Technical Support Specialist
Customer Service & Support
Autodesk, Inc.

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