Thanks Bill! I've got a guy working on calculating the header beam to make sure that my plan will work. My biggest concern is maintaining the look I want. I decided to just use 4x6 Douglas Fir for the rafter beams rather than treated and I'll stain and seal them in a darker color than the ceiling carsiding to make the ceiling really stand out. I wanted to avoid wrapping the header beams but I think there are some stainable products out there I can wrap them with and give them the same darker tone as the rafters.
Pic of the project at hand. I paid a company to do the stamped concrete then I laid the 600+ Belgian tumbled blocks for the seating walls and columns. There's a lotta adhesive in them thar walls. To the right where the table and chairs are, I'm building a pergola or buying one of the aluminum pergolas with louvers that can be opened and closed. Those things cost a few bucks so I'm leaning towards doing something with lumber in the same color as the rafters and headers to tie everything together.
