[dolphenfan]

Im working on a 16x13 deck for an above ground pool. The deck is only 4 1/2 feet off the ground and is mainly for getting in and out of the pool. My questions is, what size posts should I use, 4x4 or 6x6?

[ma0641]

Use 6X6, they are so much stronger and look much better.

[lilpoppa]

Both are adequate for that size deck, your determining factors here are what look you prefer and your budget. Either way you are looking at a minimum of 6 posts for proper support. And if possible I would reduce the deck to 16×12 it will save you a ton on material cost. Good luck with your project.