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Attach 4x4 post to 2x4 beam?

19K views 12 replies 6 participants last post by  roofermann  
Plywood's not going to work.
Use pressure treated 5/4 X 6 deck boards instead.
You'll soon find out it's going to delaminate and rot from lack of drainage.
 
Lets make sure what you just typed is clear to the O/P Pole Cat.
"I would use deck boards over plywood too"
Just decking boards, not both.