Why does the uncracked concrete option increase the concrete breakout and bond %?

Hi An,

After reviewing the reports for both cracked and uncracked concrete, it appears the reduction for uncracked concrete is coming from the breakout splitting factor, psi,cp. Per ACI 318 17.6.2.6.2 the breakout splitting factor for cracked concrete is taken as 1. For uncracked concrete it is using 17.6.2.6.1. Due to this factor, the uncracked concrete is taking a reduction making the capacity less than the cracked concrete design. If you have further questions, please feel free to reach out to Hilti's engineers at hnatechnicalservices@hilti.com.

Regards,
Dani