In post-tensioning, what is the minimum distance from penetrations that cables should be located?

In post-tensioning, the minimum distance from penetrations where cables should be located is crucial to ensure the structural integrity and safety of the concrete element being reinforced. The specified distance allows for proper protection of the tendons and prevents potential damage during construction or in the event of future modifications.

Choosing six inches as the minimum distance strikes a balance between minimizing the risk of damaging the cables while allowing for efficient use of space within the concrete element. This distance is based on industry standards and practices that take into account the potential effects of drilling or cutting through concrete, where tendons could be inadvertently damaged if placed too close to any penetrations.

This approach helps maintain the overall performance and durability of the post-tensioning system, ensuring that the cables remain intact and effective in providing the desired compressive strength to the concrete structure.