Originally Posted By: jonofrey This post was automatically imported from our archived forum.
Jeff,
Your experience serves you well. Slab was jack hammered to install electrical conduit to serve kitchen island. New construction, the conduit was not placed originally. They severed two successive post tension cables and when the tension was released, the cables shot out the foundation side wall and pulled the plug seals with them. They ran their conduit alright and sealed up the jack hammered trench in the slab. Who needs thos pesky cables anyway?
You da man.
Have you seen scenario's like this successfully repaired?
Originally Posted By: jpope This post was automatically imported from our archived forum.
jonofrey wrote:
Have you seen scenario's like this successfully repaired?
Yes. The typical repair for this is to remove the original 5/8" damaged cable and insert a 1/2" cable in its place. The new cable is stressed to 90% (about 2000 psi).
The theory is that the original design is "over-engineered" and the replacement cable is sufficient.
Replacing two intersecting cables will generally meet the minimum requirements whereas two parallel cables might be cutting it a bit close (no pun intended).
-- Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738
Originally Posted By: ccoombs This post was automatically imported from our archived forum.
Very impressive Jeff!
I have also seen them weld a new end to the damaged cable. Then provide a "coupler" connection at the cut/break and re-stress the cables.
These are very scary situations. I have heard about cables ripping out of the slab and killing people or taking out trucks.
I have a PT slab and the company that delivered my safe was just about to drill into the slab without a thought or concern. I made it very clear when I placed my order that I had a PT foundation.
Originally Posted By: jpope This post was automatically imported from our archived forum.
ccoombs wrote:
Very impressive Jeff!
 I've built many a bridge in my day. I know cables.
I've used the couplers on many occasions. They don't work well in residential slabs mainly due to their size (about 2 1/2" in diameter). Once they're greased and sleeved, they don't fit well into a 4" slab.
I have also seen the damage first hand that these things can muster. It's not a pretty sight when they let loose.
-- Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738