I agree the racking was a concern with me, but I was hoping that if I got the pipes in deep enough and filled with concrete, It would be heavy enough that I wouldn't have to worry about cross bracing. Also, I am not sure how I would cross-brace the pipes.

I did cross brace the wood posts on my original dock. And, the dock would of been fine, if I would of set it up high enough out of the water. That was my goof.

I am just not sure how I could use a wood post now? The ones on the dock now are too short and the ones in the front are lose in the ground.

I have nothing against the wood posts. I just thought the concrete ones would last longer and would not be able to heave or shift as easy.

Is there away to cross brace the pipes? Should I be concerned about it?