Quote:
Originally Posted by KenNo2658
Yeah, Its a wooden deck mate, but I want to make my own pier and sink it into the ground under it. I even have permission to cut a hole in the deck to do it! Six inch square steel tubing, filled with concrete is the plan....
Ken
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All Good

I used round tubing 4ft in the ground. You only need to fill the concrete up to the deck height.(keep mass low)
Also drill a hole in the pier and run some cable up the inside for power.
extension lead cable works good as its flexible.