Post tensioned slab on grade demolition
Post tensioned slab on grade demolition
(OP)
I need to trench through an existing post tensioned slab on grade here in Texas. My opiniion is to relax the tendons in the area and retension afterwards. Any helpful hints would be greatly appreciated. Thanks!!!





RE: Post tensioned slab on grade demolition
If you destress the tendons you will have to use special stressing gear to re-stress.
I would try and do localised trenching without destressing, maybe consider staging the trenching and re-patching, if possible. Really depends on the dimensions you are proposing for the trenching.
The trenching should be at least 36" from any anchorages to avoid a potential anchorage failure etc.
HTH
RE: Post tensioned slab on grade demolition