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-   -   Advice needed on Stem Wall correction. (http://www.diychatroom.com/f105/advice-needed-stem-wall-correction-175550/)

jaeevans 03-26-2013 11:26 AM

Advice needed on Stem Wall correction.
 
I've poured footings, retaining walls, stem walls, garage floor and driveway for my new garage. Was ready to go vertical when a change was needed to the stem wall between the two garage doors (was 3' wide and need to revise it to 1' wide for larger garage doors.) Plans are approved but now I need to do the work. I'm looking for advice or verification that what I plan to do would suffice.

Here's my plan. Please comment or advise if you can.

1. Stem wall is 18"x36"x8" above the driveway/garage floor. I was going to start by taking an angle grinder and diamond blade and cutting the bottom all the way around the stem wall as deep as it will go. Maybe 2"?
2.)Take a sledge hammer and knock the wall to crack it all the way through at the bottom
3.) Take a breaker and break up the concrete revealing the rebar and freeing the Simpson straps.
4.)Once the wall is gone, chip out another 2" to 3" below the surface and cut the rebar to leave only what will be used with new 1' wall.
5) Form up the new wall.
6.) Paint base will bonding agent and mix concrete with bonding agent. Pour form and put straps back in. Finish area as part of new garage floor.
7) let set and remove forms.

Does this sound right? If I didn't have to have the straps in there I would have just cut the thing down to size and left a piece of what was originally poured but unfortunately those traps have to be embedded.

Thanks in advance for any comments.

joed 03-26-2013 11:32 AM

No need to cut the extra 2 inches deep. Just cut the rebar even with the floor.

GBrackins 03-26-2013 01:12 PM

Quote:

Originally Posted by jaeevans (Post 1146157)
Does this sound right? If I didn't have to have the straps in there I would have just cut the thing down to size and left a piece of what was originally poured but unfortunately those traps have to be embedded.

I take it the straps are for uplift and shear/lateral forces. If so, why can't you use something like this that would attach to the jack/king studs on each side of the garage doors?

http://www.strongtie.com/products/co...s/HDU-DTT2.asp these attach to the anchor bolts, may require a coupler nut and a piece of threaded rod. Find out what the tension load of the strap is and match with the tension load of the holdown bracket. If you do not have a anchor bolt there you could epoxy the threaded rod into the foundation.

if you were required to have your drawings prepared by a professional engineer then you'd have to run this past them.

Just a thought ....

jaeevans 03-26-2013 01:25 PM

Thanks Gary,

I have to have anchor bolts as well. Two anchor bolts + Straps + three studs on each side of a 1' wall = no space. :-( I have to have all that stuff on each side of the garage doors as well. I appreciate the comment though.

Quote:

Originally Posted by GBrackins (Post 1146223)
I take it the straps are for uplift and shear/lateral forces. If so, why can't you use something like this that would attach to the jack/king studs on each side of the garage doors?

http://www.strongtie.com/products/co...s/HDU-DTT2.asp these attach to the anchor bolts, may require a coupler nut and a piece of threaded rod. Find out what the tension load of the strap is and match with the tension load of the holdown bracket. If you do not have a anchor bolt there you could epoxy the threaded rod into the foundation.

if you were required to have your drawings prepared by a professional engineer then you'd have to run this past them.

Just a thought ....


GBrackins 03-26-2013 01:28 PM

Quote:

Originally Posted by jaeevans (Post 1146235)
I have to have anchor bolts as well. Two anchor bolts

couldn't you use the anchor bolts to attach the holdowns to? I know it's a PITA, we have to do all that here. I use the brackets, less problems

jaeevans 03-26-2013 01:35 PM

I'll ask for sure. I guess if I could I could just use a saw to cut the wall down without having to repour.



Quote:

Originally Posted by GBrackins (Post 1146239)
couldn't you use the anchor bolts to attach the holdowns to? I know it's a PITA, we have to do all that here. I use the brackets, less problems



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