Excavated Garage/Bunker Question - Building & Construction - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 05-23-2013, 09:45 AM   #1
Yo Yo Ma!
 
Join Date: Oct 2012
Location: Columbia, MO
Posts: 14
Rewards Points: 10
Default

Excavated Garage/Bunker Question


Good morning--

We're coming up on a year in our new-to-us home built in 1980. One of the features I love about it is the over-sized two car garage and the fact that it is excavated beneath. Kind of a bunker down there and we would obviously seek shelter in this area during any severe weather. My question is, are floors in excavated garages just a large slab "sitting there" or are they secured somehow to the basement walls? I could not really tell last night when I was down there checking it out. The recent OK tornado got me researching the subject a little bit on whether or not the concrete floor/ceiling could be blown off. I would like to say it is unlikely but thought I'd get some other opinions. I've actually read one story where something similar to this did happen in a tornado and the cars fell in. Yikes!

I've supplied an upper and lower photo. Both photos are roughly from the same angle.

Thanks,

Mark




Advertisement

harrydunn is offline   Reply With Quote
Old 05-23-2013, 12:18 PM   #2
Member
 
Join Date: May 2012
Location: Sarasota,Florida
Posts: 1,633
Rewards Points: 1,164
Default

Excavated Garage/Bunker Question


The slab SHOULD be tied to the walls with rebars,but seeing as how things are done today,and by whom is another story,it doe's appear to look like whoever did it knew what they were doing.

Advertisement

Canarywood1 is offline   Reply With Quote
Old 05-23-2013, 01:41 PM   #3
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,788
Rewards Points: 692
Default

Excavated Garage/Bunker Question


I've never once seen a slab floor "attached" to the walls. In fact there's suppost to be an expantion strip all around the outside of the slab.
Your walls were put in place and the slab was pored at some point after that.
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is online now   Reply With Quote
Old 05-23-2013, 02:11 PM   #4
Member
 
Join Date: May 2012
Location: Sarasota,Florida
Posts: 1,633
Rewards Points: 1,164
Default

Excavated Garage/Bunker Question


He's talking about the upper slab Joe,not the lower one.
Canarywood1 is offline   Reply With Quote
Old 05-23-2013, 02:45 PM   #5
Yo Yo Ma!
 
Join Date: Oct 2012
Location: Columbia, MO
Posts: 14
Rewards Points: 10
Default

Excavated Garage/Bunker Question


Quote:
Originally Posted by Canarywood1 View Post
He's talking about the upper slab Joe,not the lower one.
Correct. The slab cars sit on above.
harrydunn is offline   Reply With Quote
Old 05-24-2013, 12:32 PM   #6
Member
 
GBrackins's Avatar
 
Join Date: Apr 2012
Location: Fairhaven, Massachusetts
Posts: 2,877
Rewards Points: 2,032
Default

Excavated Garage/Bunker Question


normally any floor system would be attached to the top of foundation walls. this helps to provide lateral stability to the foundation and helps to prevent backfill from pushing the foundation walls in towards the top of the wall, the bottom of the foundation is braced by the concrete slab.

with this said what should be done and what WAS done is not always the same.

is the bottom of the upper slab level with the top of the concrete foundation? if so, it may be tied together, however there is no way to visually determine that I am aware of. I have seen slabs that just floated on top of the foundation.

If it of concern I'd bring in a structural engineer for evaluation. they may need to bring in a lab to do some x-rays to determine if reforcing steel ties both the foundation walls and upper concrete slab together.
__________________
Gary

"You get what you pay for, and sometimes free costs more!"

Last edited by GBrackins; 05-24-2013 at 12:34 PM.
GBrackins is offline   Reply With Quote
Old 05-24-2013, 07:13 PM   #7
Member
 
Join Date: May 2012
Location: Sarasota,Florida
Posts: 1,633
Rewards Points: 1,164
Default

Excavated Garage/Bunker Question


If you need to know for sure if it's properly constructed, GPR or ground penetrating radar scanning is a better way than xray,it's also cheaper and safer,and more reliable and they can pinpoint the rebar to the nth degree.
Canarywood1 is offline   Reply With Quote
Old 05-24-2013, 08:40 PM   #8
Member
 
GBrackins's Avatar
 
Join Date: Apr 2012
Location: Fairhaven, Massachusetts
Posts: 2,877
Rewards Points: 2,032
Default

Excavated Garage/Bunker Question


Canary,

you and your new fangled technology .... LOL
__________________
Gary

"You get what you pay for, and sometimes free costs more!"
GBrackins is offline   Reply With Quote
Old 05-24-2013, 09:32 PM   #9
Member
 
Join Date: May 2012
Location: Sarasota,Florida
Posts: 1,633
Rewards Points: 1,164
Default

Excavated Garage/Bunker Question


Quote:
Originally Posted by GBrackins View Post
Canary,

you and your new fangled technology .... LOL

No not new Gary,been around for quite a while now.

Advertisement

Canarywood1 is offline   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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Another Aluminum Siding prep question aribert Painting 6 03-14-2013 02:48 PM
Plumbing for new shower kit question noviceshock Plumbing 6 03-02-2013 09:11 PM
quick question on closet flanges corman Plumbing 3 11-18-2012 04:18 PM
DRIcore question trailblazer1229 Flooring 0 02-24-2010 10:25 AM
Basement Renovation Question KUIPORNG Remodeling 234 08-26-2008 09:19 AM




Top of Page | View New Posts