tswitos

ICF Exterior Walls - Open and Boxed

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When drawing a 3-sided ICF wall with a footer, it appears to work fine.  But when I add the fourth wall, make it 4-sided, it looks like a slab.  Please see the below images for clarity.  How can I fix this?  Thanks.

 

icf-2.PNG

icf-1.PNG

icf-3.PNG

icf-4.PNG

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Works fine here.

 

What happens if you do this in a new plan without changing anything? Just draw the 4 walls.

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Could be floor defaults for ceiling height or could be foundation wall default height. What happens if you draw main floor and have foundation auto-build?

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If I start with a new plan, it will default to a different exterior wall type, and then I can box it.  But that is not what I want.  Below is an image of the wall type with the footer that I want to make, but I cannot get it to work.

 

 

icf-5.PNG

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Change the default wall type prior to drawing your walls, or draw a wall, change it to your wall type, then drag it around to form your room.

 

ct1.thumb.jpg.166b49a90c5cf71dd13474b8e85e67f2.jpg

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Uncheck Slab Footing.  When you check slab footing you are telling the program that you want the walls to be used to form the footings for a monolithic slab foundation so as soon as you enclose a room that's what you're getting.  The slab footings should go on the foundation room below if that's really what you want but should not be spec'd for your main walls.

 

NOTE:  You may also have to increase your ceiling heights if you make this change after the fact.

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Once you enclose your room you can also just open the room up and increase the ceiling heights instead of unchecking Slab Footing.  I still say that you shouldn't be using that checkbox in this situation as the foundation belongs on the floor below but I wanted to point out that you CAN have that checked and still get what you're after.  There's just no good reason to do it that way IMO and its really not how I think that setting was designed to be used.  Again, once you enclose the room, Chief automatically converts the room to a monolithic slab and when it does that it changes the ceiling height to zero.

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That just doesn't make any sense.  Why Chief would allow you to make the default settings, and then it doesn't work.

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12 minutes ago, tswitos said:

That just doesn't make any sense.  Why Chief would allow you to make the default settings, and then it doesn't work.

 

It does work.  I just don't think you're using it in the right way.  I would suggest you get in the habit of using the Help files...

 

 

Help.thumb.jpg.8af1761c10641e5f7cfa5265cc0bf53f.jpg

 

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I should be able to sketch my ICF walls with the specified footer and calculate the total amount of required concrete.  As of now, I don't see how to do that.

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4 minutes ago, tswitos said:

I should be able to sketch my ICF walls with the specified footer and calculate the total amount of required concrete.  As of now, I don't see how to do that.

 

 Exactly what type of foundation/floor structure are you trying to draw? 

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For now, I’m just trying to create a simple 4-sided building as I showed in my first post, with a footer, and calculate the total amount of required concrete.  Then, as I add windows and doors, etc., I should see the amount of concrete decrease (automatic update).  I want to establish the methodology on how to do this in Chief.  I have watched a lot of the online videos, but I didn’t see anything on how to do this.

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I checked Foundation Wall, which produces a footing which you may adjust for size -- and I assumed that's what you did too (should have looked at your image).

 

If all you want is the amount of concrete -- which is an estimate, so you will need to verify that the forms you are using match to what Chief is calculating, an ICF wall with Foundation Wall checked should work.

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Chief should calculate the amount of concrete based upon the dimensions the end user entered for the exterior walls and footer and show in a table, somewhere, the required cubic feet.  I’m learning Chief, a trial version for 30 days, and spending also 30 days to learn Softplan with its trial verson.  Softplan does this with ease, as shown below, but I cannot figure it out in Chief.  I want to design ICF homes, and I have to determine which software works the best.  I like them both, and I’m not an expert in either one.

 

 

 

soft-icf-2.JPG

soft-icf-1.JPG

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6 minutes ago, tswitos said:

but I cannot figure it out in Chief. 

 

What are you unable to figure out?

 

Have you reviewed the material list? It shows the concrete used in the wall and footer, and it changes when you add openings.

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I can't go to the materials list until I can get Chief to make an enclosed perimeter exterior ICF wall with a footer without making a monolithic slab.

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That's what I have been trying to do.  Now I just have to figure out how you did it.

 

 

icf-1.JPG

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Change the default wall to ICF, check Foundation Wall, change the footing (under Foundation) as needed.

 

Draw your walls. Make the room Open Below, or just leave the default floor structure as is -- should default to wood.

 

But, as Michael said, this isn't the correct (Chief) way to build a structure. Explaining a bit more about what you are building will help others help you.

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6 hours ago, solver said:

Change the default wall to ICF, check Foundation Wall, change the footing (under Foundation) as needed.

 

Draw your walls. Make the room Open Below, or just leave the default floor structure as is -- should default to wood.

 

But, as Michael said, this isn't the correct (Chief) way to build a structure. Explaining a bit more about what you are building will help others help you.

 

Honestly, there's nothing really wrong with what you just spelled out but you also correctly left out the checking of the Slab Footing box.  That's all I was saying...don't check that box unless you want Chief to treat that wall as a footing for a slab.  And again...if you make this mistake you're going to end up having a room with a zero ceiling height as well as a monolithic slab foundation.  You'll need to fix those settings. 

 

P.S.  By "you", I don't mean you Eric, just any yous who might be reading along : )

 

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solver,

 

I was able to replicate the enclosed ICF walls, based upon your guidance.  Thank you.

 

What I am trying to design is an ICF home, but I am starting with the exterior wall along with the footer.  But you stated that this is not the Chief way, and I don’t know what is.  I thought starting with the exterior walls was the right approach.

 

My approach to modelling is the same as if the contractor was building it.  Footers/piers and ICF wall (with window/door cut-outs), floor joists, subflooring, interior walls, roof trusses, roof, etc.

 

I guess I will have to watch more Chief videos to figure out the Chief way. :)

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I'm guessing your structure looks similar to this. Footing, stem wall (may be ICF) then your ICF wall. 

 

Floor structure might be as shown, or hang (or rest on a ledge) on the stem wall.

 

Correct?

 

ct1.thumb.jpg.4e2a81cba84b9556e566b3fdff8a7fea.jpg

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Not exactly.  The ICF will start on the footer, and the floor joist will integrate to the ICF wall via joist hanger.  Here’s an example.  There are several methods of doing this, and they vary depending if it is bearing or non-bearing.  I don’t know if Chief can show these types of joist hangers.

 

 

joist-holder-3.JPG

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Perhaps I need to start another topic on joist hangers for ICF walls?

 

You have already answered my question to this original topic, boxing in ICF walls.

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