Im looking for the strongest concrete screws

[paulmars]

for outdoor humid, hot central florida. Strong structural concrete screws.

Im attaching simposon H10S and LGT2 straps to my rafters and cinder block walls. Im using simpson screws to attach to the rafters, however simpson makes no outdoor concrete screws and has no suggestions. So, Im looking for the best reasonably priced outdoor concrete screws for use in central florida.

thanks,
pa?

 

[masona]

We're in the UK, however what we have here and search for Thunderbolts Screws or Screwbolts