When I have built similar shed roof shelters I used 6 X 6 treated post and direct buried them 30% of their overall length with 3 to 4 bags of post pix for each post. Then all rafters/beams are through bolted into the post with at least 3 - 1/2" or 5/8" bolts. Use
Joist hangers and/or H25's on the rest of the rafters and/or purlins for wind load based on your design.
As AUswimKC said you currently are building a sail here.
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Bill, from Cochise County Arizona
LSG 24 X 36 Horizonatal Offset w/warming oven,
32" fire pit with swinging cooking grate,
PK 360 w/Grill Grates
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