Replies

1. 
   JeffinPA | Feb 17, 2008 06:32pm | #1

   IMO, an engineer.

   If I understand you, you want to undermine your footings and dig down since you only have about 6'8" basement ceiling.

   There are methods and ways, but the load must be transferred down to the new footings.

    

    

1. 
   deersniper | Feb 17, 2008 07:27pm | #2

   yes, but which way is better,do i do that in section of 3-4 feet at the time,remove the concrete slab dig under the walls 3-4 feet, skip a section  dig again under the walls 3-4 feet etc.

   poor one walls at the time with the footing section by section 3-4 feet,drill under the walls every 16'' , put rebar with epoxy for the new section and rebar for the side when i will poor between section

   is this a good way or you know a better way!

   thanks!

    

1. 
   JeffinPA | Feb 17, 2008 09:30pm | #3

   Hmm

   I've never undermined all the way around.  Yes, that would be the way to do it but that is a serious workout.

   Is it a square box with full unfinished basement?

   I might consider jacking up if the exterior topo could handle it.

   You would have to redo stoop, stairs, regrade, fill in siding, etc, but might be easier.

    

1. 
   deersniper | Feb 18, 2008 03:15am | #4

   thanks for your advise!!!!!

   Is anybody have something else in mine? how can i do that project!

2. 
   deersniper | Feb 18, 2008 05:07am | #7

   sorry,i forgot to answer your question.

   yes it's a square box with finished basement.

   i don't thing the footing is very wide,and walls and footing sitting on solid rock!

1. 
   JeffinPA | Feb 18, 2008 03:39pm | #8

   If the walls are sitting on solid rock, how are you going to dig down?  And with a finished basment, are you attempting to salvage finished basement when you do this?  Correct me if i am wrong, but you are intending on undermining and underpinning from the inside right?

   Regarding the how, I would invest into one of those mini skid steers that you stand on to operate and put in a ramp to access the basement.

   When done, use opening for egress door.

   Need to vent well due to gas fumes but that is a project that would be so labor intensive I could not imagine the end of it.

2. 
   MikeSmith | Feb 18, 2008 04:01am | #5

   deer..... old guy i know did the entire foundation of his hardware store exactly the way you described....

    i'm thinking 10 years

    foundation was about 60' x 60'Mike Smith Rhode Island : Design / Build / Repair / Restore

1. 
   deersniper | Feb 18, 2008 04:48am | #6

   thanks! I think it's a good way to do it,it's more work ,and next door is pretty close to my house

   any more idea?

   love this site?full of information

2. 
   john_carroll | Feb 18, 2008 04:21pm | #9

   I've converted part of my crawlspace into a basement. There are pictures in discussion # 73774.8