In BLACK+DECKER Deck Codes & Standards, national authority on building codes, Bruce Barker, explains how to both design and build decks within legal limits. National deck building codes have changed significantly in the past five years: 4 x 4 posts are no longer allowed for structural purposes that a few years ago were deemed fine, and minimum diameter requirements for concrete posts have doubled in many applications. If your existing deck is more than two or three years old, you'll want this detailed but accessible volume.