I have a question about the minimum edge distance check and minimum spacing check that Profis performs for screw
anchors when designing per ACI 318-19. That version of ACI 318 added tables 17.9.2(a) and 17.9.2(b), which provide minimum anchor spacing and edge spacing requirements. I’m finding that I’m able to violate these requirements in the Profis without warning (unless I’m missing something).
For the attached example, I used ¾” diameter screw anchors with hef = 3.79”. According to the tables, the minimum anchor spacing and minimum edge distance would be 6*3/4” = 4.5”. However, the design report indicates an acceptable design with lesser values.
Is Profis using alternate criteria to check for these spacing and edge distance minimums?
Hi Oliver,
The code recommends the spacing, edge distance, and concrete thickness requirements to come from product specific tests (see screenshot attached). Hilti has third party testing, ICC, complete the tests per the acceptance criteria from ACI: AC193/ACI 355.2 for mechanical anchors. The minimums come from the testing that is performed, and then published in the ICC ESR. PROFIS Engineering pulls the values for the calculations from the ICC ESR for each respective anchor. If a manufacture forgoes testing to determine minimums, then the code minimum requirements would be applied.
Regards,
Dani
