Metal connection to existing post tension concrete ceiling

Here is the link to the Hilti Product Technical Guide for Direct Fastening. As there are a variety of factors that will need to be accounted for in the design phases of the project, a good starting point would be Section 3.2.5 “General Application Fasteners,” which will help to narrow down the products to consider. The two most commonly used direct fasteners for attaching to concrete are the X-U and X-P fasteners.