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     I have a job where the slab on grade for a residential building is bonded pretensioned.  I have a good idea of the location of the prestressing strands and will need to cut two of these prestressing strands to place a new foundation for a new column.  I would like to cut a channel into the existing slab parallel to and near the cut tendons. The channel would continue over the new foundation.  A new tendon could then be epoxy into the channel.  My problem is I do not know of a way to stress and anchor the new strands over the new foundation and existing slab.  I have some doughty if it is needed but I would like to keep things as near to original as possible.  If anyone has any experience with a similar slab I would like to hear it.

Thank You
Acie Chance