Doughboy Side Support Lean-in Preload
I'm doing my third Doughboy above ground 16 x 40 (I'm 70 years old)
In new design "Com-Pac II", the side verticals lean in about 2 inches at the top. Instructions say this will straighten up after waters is added.
I would really like to know if the "straightening up" is expected to be from the metal bending or from soil compaction?
My installation is mostly in rock and there ain't going to be much soil movement/compression. On the other hand the supports seem really stout.
I can't get an answer out of Doughboy or the dealer.
The older doughboy models had a brace on the side support, installed true vertical and worked great.
Hi CW. I have not seen a Doughboy instruction manual in years but I remember looking at it when that design first came out. At the time I believe it said 2 degrees inward, which meant to me just a small amount.
There is a very good reason for this and it has nothing to do with how hard the ground is. I assume you are installing an 8 x 8 x 16 block under the rear of the support, this is very important, just as it was in the older models.
With this new design a large part of the support has shifted to the inside of the pool. This support is held in place by the weight of the water carried across all the pressure plates. The channels want to rise up as the pool fills, and the water holds them down. During this process what ever you have between the pressure plates and the liner will compress.
I used a sand base for the majority of my installs. As the pools would fill the sand would compress slightly and the side would end up perfectly straight up and down.
I never figured out exactly what 2 degrees would amount to I did find a method that worked perfectly every time.
I set the buttress post at the height that would make the bottom of the rails level all the way around the pool. I would set the very front of the channel exactly 1/4" lower.
Using a surveyors stick I would first put it next to the buttress post on top of the channel. Say my target number was a 2. I would slope the channel slightly so that the inside end of the channel would read a 2 1/4.
I used that formula for years and never had a problem with the newly designed buttress structure.