Hey!

I'm completely green to the forum, this is me very first post!

I'm designing a modified pergola design for our deck, planning on using cedar 6x6 for uprights and horizontals for a uniform, modern look. My question is how long a span can I have with out having to worry about it sagging under it's own weight? Could I go 12ft? I googled span lengths extensively but only came up with 2x4, 2x6, 2x8, etc. Anyone know where I could find span lengths for 6x6 or 4x4 even?

I attached a picture of the "pergola", we're looking to use Shade Sails as the roof, so the structure is just a frame really.

[img:left]https://drive.google.com/file/d/0B9P_BsTtMfJMcDRBd0JrWUVXVGs/view?usp=sharing[/img]