Thanks to all for very helpful posts.
To be clear, this is new construction in which a steel subcontractor drilled anchors into the webs of precast double tees. This was done based on a detail on the EOR drawings that did not give direction on the location of where the holes were to be...
Bridgebuster,
Thank you for sharing your experience. Since there is no loss of bond between the strands and concrete, instinct tells me that the intended function of the strands could remain intact, but in the case of a double tee, the strands also act as primary reinforcing for strength. Any...
Thanks Zambo,
This is the typical seven-wire strand, and the investigation indicates two wires damaged in the bottom tendon, two wires damaged in the second tendon, and one wire damaged in the third tendon (all from the bottom). The report indicates that each of these five wires have lost less...
One of the double tees used in a precast prestressed concrete parking garage had three tendons nicked during the drilling for a post-installed anchor (yep, bad idea...don't ask!). A boroscope investigation of the holes reveals that each of the three strands had apparently lost less than 30% of...
