help with pergola design
I am building a paver patio in the back yard of my northern California home and want to incorporate a freestanding pergola.
The pergola will be built from redwood and will cover an area of 20' X 16'. There will be 3 posts on each of the long sides, measuring 6"X6". I plan on sandwiching those posts with two 2"X10" boards and then putting on 2"X8" rafters across the 16' span.
Does this sound like it would work? My concern is that the 16' rafters will sag. I can have the posts span a 12' distance and then cantileaver the otehr 2' on each side, is this needed?
Thanks for the help in advance!