-6x6 posts will be placed on concrete footing using simpson strongties.
-footings will be 4' deep and entirely in 3/4" clean backfill that was used for fill behind a retaining wall. (They will be about 6' away from the retaining wall)
-posts will be notched at the top to accept the beams.
-beams will be through bolted to posts and each other.
-all rafters and purlins will be notched at joints to increase stability
My questions are:
Will the design work in relation to stability & beam strength? (Will the beams likely sag or are the 2x10s sufficient?)
Could I safely remove the four inner posts so that I only have the four outer posts? (I am worried about distance between posts for the 2x10s.
Would it be a problem if I increased the width of the pergola to 144"? (Thus increasing the length of the 2x8 rafters)
I appreciate any help provided.