Quote:
Originally Posted by 911 Rod
Shouldn't the trusses be sitting on top of the posts?
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That has to be a drawing error.
Since I entered the thread, I think I would design with a simple pergola design in mind and then use that structure to attach the poly roof. The benefits are a more pleasing structure, better support of the plastic and a better shade factor. Tinted poly is not as cool as one would think. Between a neighbor and and I, we found that his light green tint as equal to better than my smoke tint.
FWIW, my panels have lasted since 2006. I have replaced some and they stand out as more clear, of course. I might not have had to replace any, but my original attaching process was defective. I didn't predrill larger holes and once a few cracked wind did some damage.
The cover being free standing needs a lot of design consideration. Winds really play havoc with the edges to the point that I tucked them behind facias. I left just enough space for drainage. Any trees around that will drop leaves or sap will be very problematic and should be avoided. Either way, it needs cleaning often.