The slot in the base enables flexibility around the anchor bolt, making precise post placement easier The 1-in. standoff design meets code requirements for structural posts installed in basements or exposed to weather or water splash Increased uplift loads for earthquake or wind loading Nominal post size: Double 2x4 Made from 16-gauge steel The Simpson Strong-Tie ABA is designed to attach wooden posts to existing concrete. The built-in 1-in. standoff of this adjustable post base helps to prevent rot at the end of the post. The ABA has a slotted anchor hole in the base for adjustability and attaches to the post with nails or Strong-Drive SD Connector screws. This versatile post base makes a cost-effective option for securing a post to the foundation.