This is a really nice Deck and Pergola we recently built in the Austin Texas Area.
The decks constructed from treated lumber, using full 2×6’s over joist which are spaced 16″ apart. This creates a solid long lasting product.
The pergola, as well as railing is constructed using cedar for great looks and durability.
We us treated 1×6 pine for skirting to keep critters out from under the deck while allowing air flow.