Ryan,
No fear of steel here...been sellin' it for 28 years. It is not inordinate for me to contract a government job at the plant where I work. I am still searching and hoping to find sumthin real simple. If not, the plan at this point is probably something like: a) drill a 12" dia x 36" deep hole for each vertical support into pond bottom (about 8 +/-) b) sonotube up another 2 feet above pond bottom c) 4 verts and 5 expoxy coated circle rebar per pier (govt work) d) pour the piers when the concrete truck is pouring the slab for the launch (shhhh, not too loud or my wife will hear) e) set a galv or stainless j-bolt at the center/top of each f) buy (or fabricate) stainless post anchor (simple C shape, similar to cheapie deck post anchors, hole drilled center/bottom) and bolt one to each J bolt at top of ea pier g) 6 x 6 treated post, recess center/bottom of post to accommodate the protruding J-bolt and drop it into fabricated SS fabricated post anchor h) 1/2" bit, horizontal thru the verts of the SS post anchor, thru the 6 x 6, and out the other side of SS post anchor i) 1/2" x 8" galv bolt thru hole just drilled.
Then, onto the treated framing.....stay tuned.
