I am hoping someone can help me with the proper way to bracket two 6x12 headers to the top of a 6x6 post at a corner (i.e. 90 degree angle). It's for a free standing pergola and the spans the 6x12s are covering are 20 feet and 16 feet, so I would like it to be as secure as possible.The headers will support joists (for shade) but no other weight than that.
Also, people keep telling me to not sink the posts in concrete, but to use brackets into the coccrete instead. If I treat the posts and put gravel below the footing is it really that risky to go direclty into the concrete?
Thank you very much for the hekp and advice,