u/carryondontmindme

I am planning to build a 16x16' ground level platform for a 14-ft diameter Intex above-ground pool, approx 5000 gallons. Planning to sink 6X6 posts in poured concrete at the corners, use pressure treated ground contact 2x6 for the perimeter, pressure treated ground contact 2x4s spaced 12" apart throughout, apply joist tape on everything, and use composite decking for the entire top. Am I obviously miscalculating anything here, or an I on the right track?