#1  
Old 07-11-2011, 12:19 PM
NYC NYC is offline
Apprentice
 
Join Date: Jun 2011
Location: NYC
Posts: 110
Default Slab question...

I live in NY and wondering how deep of a foundation to pour for a Pompeii. I will be leaving my current oven alone and build the new one in another area. We generally pour a 6" slab for driveways to handle the weight of cars reinforced with steel mesh. How deep should I go for the oven footing?
Reply With Quote
  #2  
Old 07-11-2011, 01:05 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,799
Default Re: Slab question...

Depends on the soil but a good rule of thumb is below the frost line.

EDIT... I should have said the footings should be below the frost line
__________________
Check out my pictures here:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


If at first you don't succeed... Skydiving isn't for you.

Last edited by Les; 07-11-2011 at 01:51 PM.
Reply With Quote
  #3  
Old 07-11-2011, 02:15 PM
NYC NYC is offline
Apprentice
 
Join Date: Jun 2011
Location: NYC
Posts: 110
Default Re: Slab question...

Our frostnline is 36" deep. I can see dropping a sonotube in the center but not anfull slab 3 feet thick. Any thoughts?
Reply With Quote
  #4  
Old 07-11-2011, 02:33 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,799
Default Re: Slab question...

Correct - that's why I added the edit. A three foot slab would be insane.
__________________
Check out my pictures here:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


If at first you don't succeed... Skydiving isn't for you.
Reply With Quote
  #5  
Old 07-11-2011, 02:44 PM
NYC NYC is offline
Apprentice
 
Join Date: Jun 2011
Location: NYC
Posts: 110
Default Re: Slab question...

So then use a post digger on the corners and center down to 36" at about a 6" diameter and then pour it with a reinforced 6" slab for the foundation? What you think?
Reply With Quote
  #6  
Old 07-11-2011, 03:14 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,799
Default Re: Slab question...

Sounds like it will work. I'd drop some steel in the holes as well. Do you know what type of soil you have?
__________________
Check out my pictures here:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


If at first you don't succeed... Skydiving isn't for you.
Reply With Quote
  #7  
Old 07-11-2011, 03:21 PM
NYC NYC is offline
Apprentice
 
Join Date: Jun 2011
Location: NYC
Posts: 110
Default Re: Slab question...

We have mostly clay here with maybe 12" of top soil on top.
Reply With Quote
  #8  
Old 07-11-2011, 03:42 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,799
Default Re: Slab question...

Bummer - go deep.
__________________
Check out my pictures here:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


If at first you don't succeed... Skydiving isn't for you.
Reply With Quote
  #9  
Old 07-11-2011, 03:54 PM
Neil2's Avatar
Il Pizzaiolo
 
Join Date: Oct 2006
Location: Vancouver Island
Posts: 1,374
Default Re: Slab question...

Many have just used a floating 5-6 inch reinforced slab (rebar not WWF) regardless of the soil conditions.

Put a 3-4 inch layer of crushed ruck under the concrete slab and make sure this layer has positive drainage.

Frost heaving, if severe, may move your slab and oven around a bit, but if it is well reinforced it will take it OK.

To my knowledge, no one has on this site ever reported a failure in a properly reinforced slab due to frost action. (Underlined properly since a lot of the slabs I have seen here are clearly not done very well with respect to rebar placement.)

Last edited by Neil2; 07-11-2011 at 03:58 PM.
Reply With Quote
  #10  
Old 07-11-2011, 05:17 PM
NYC NYC is offline
Apprentice
 
Join Date: Jun 2011
Location: NYC
Posts: 110
Default Re: Slab question...

After speaking to the mason who poured 3,000 sq ft for me last summer around the pool he said to go 30 inches down with 8" ID tubes in the 4 corners and center and then 8" reinforced slab on top of the stone base. I want to brick the cinder block base and top enclosure so it will bear alot of weight on this slab and also I do not want too much cracking in the mortar of the brick due to movement. Biggest hassle is getting this pour done fast enough with a mixer before it sets as I cannot fit a truck back there for delivery of ready to pour stuff like we did for the pool. That was before the brick wall and gate were built.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
A hello and a beginner slab dimension question sephora2011 Getting Started 3 06-28-2011 10:05 AM
Question on stone slab identification Faith In Virginia Getting Started 4 02-02-2011 06:31 PM
Concrete slab question fxpose General Building and Construction 185 04-02-2010 10:12 AM
New hearth slab design question DrakeRemoray Pompeii Oven Construction 6 04-24-2006 01:42 PM
Question about isolated hearth slab Alan Getting Started 26 07-21-2005 07:00 PM


All times are GMT -7. The time now is 02:25 AM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC