Build a deck the easy way using Pylex adjustable deck support brackets. You can install these brackets in a deck-block or a concrete sonotube. They allow you to level the deck floor during construction to help create an even base. You can also adjust the structure up to 3" in case the ground has shifted after freezing and thawing. These deck support brackets fit 3-1/2" square posts. You can reverse them by tipping the base 180 degrees. These durable brackets can support decks weighing up to 2725 lbs.