How many footings and posts will be needed to support the deck and where will they go?
Footings and posts support the beams which support the joists and the deck boards. The bigger deck, the more footings you’ll need. What size beams will be needed for the spans between posts ? There are formulas to determine the sizes based on the spans. But the general rule is that the more footings used on a given span the smaller the beams need to be, so maximizing the footings will minimize the beams and vice-versa.
