OVERVIEW: ABU ZMAX Galvanized Adjustable Standoff Post Base for 4x6 The Simpson Strong-Tie ABU is designed to attach wooden posts to existing concrete in high capacity applications. The built-in 1-in. standoff of this adjustable post base helps to prevent rot at the end of the post. The ABU has a slotted anchor hole in the base for adjustability and attaches to the post with nails, Strong-Drive SD Connector screws or bolts. This versatile post base makes a cost-effective option for securing a...