Simpson Strong-Tie® post bases connect the bottom of wood posts or columns to a concrete foundation. The PBS is designed to provide a secure connection between a post (or column) and concrete in projects including decks, patio covers and other top-supported structures. These post bases are elevated 1 in. to avoid contact of the wood post with standing water to help prevent rot at the post end. PBS Galvanized Standoff Post Base for 4×6 (Pack of 180).