Well, small set back...
I put a level on the beams after the construction and everything looked pretty good. Not perfect, but totally passable for standard construction. It was kind of nagging me in the back my mind for a couple months though and it occurred to me I had a laser level. So I shot a line 5 inches above the beams and measured down. Well I'm glad I did. It turns out over the span of 16 feet a tiny bit out of level translates into almost 1/2 of an inch, with more than 1/4" racking corner to corner. So that sucked.
Not wanting to try and bandaid it with foam I decided to bite the bullet and redo the top.
Before I leveled it, I wanted to put as much weight on it as I could to ensure I didn't get much settling.
9 bins of water and 1500 pounds later; I'm pretty sure my neighbors thought I was nuts as I filled these with my garden hose.
A week later, off with the plywood, and of course it had to be glued
Tip: if you ever have to remove PL glue, a heatgun turns it soft enough to easily scrape it right off but use a chemical respirator, I did half of it without one and paid dearly that night.
Now to shim it, I have a planner so I made a jig to plane 1x6s down into long wedges. I ended up making eight 4 foot wedges which where about 1/8" shorter on one side. It was tedious as hell but worked well. Here they're installed:
Grabbed a nice finished birch 3/4 plywood from Windsor and proceed to glue it down only to realize I only had about half the amount of glue I need. That was proceeded by a frantic trip to the hardware store and a ton of clamps to get the curing glue flat. In the end it turned out perfect, less than 1/64 from end to end.
Putting me right back to waiting for the tank
