Decks constructed around above ground pools are no different than any other freestanding deck. They should not be attached to the pool for any stability. The pool is essentially just adjacent to the deck. For most above ground pools, these decks will be anywhere between 3 to 6 feet above the ground and must be laterally braced from the beams/joists to the bottom of the posts. Cross bracing in these regions and in both axis’s (north/south, east/west or such) is necessary. At common pool heights, embedding posts in the foundations will not be sufficient for lateral restraint.
New building codes addressing decks around pools should also be considered. The maximum gap between the decking and the pool coping is generally 3/4 inch. Slip resistance, gaps between boards, and slope of the deck may also be regulated depending on the local codes. These design requirements should also be considered for any deck adjacent swimming pools or hot tubs, whether in or above ground.