Yeah getting close to being out of my depth of knowledge on this too. The bracket will be sitting half on both sleeper and paver so, being so close to the edge of both my concern is if I drill into either I will crack them.
I though of welding an extension from the sleeper posts so there is some lateral strength happening there. The end posts will be secured to the house an pergola post.
Once I get these brackets sorted the rest will be fairly straight forward.








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