The Simpson Strong-Tie ZMAX® Adjustable Post Base is engineered to secure 4×4 wood posts to concrete while maximizing durability and ease of installation. Constructed from 16 gauge steel with a ZMAX® galvanized finish, this base provides superior corrosion resistance—ideal for decks, patios, pergolas and other outdoor structures. Its 1″ standoff keeps wood elevated above moisture, preventing rot at the post end. A slotted anchor hole allows for precise adjustment around the anchor bolt, and fastening is simple using nails or Strong-Drive® SD Connector screws. Designed for both professional builders and DIY enthusiasts, the ABA44Z brings code-compliant performance and long-lasting reliability to any top-supported application.

Key Features

• 16 gauge ZMAX® galvanized steel for exceptional corrosion protection
• 1″ standoff design elevates wood above concrete to prevent decay
• Slotted anchor hole enables precise post placement around bolts
• Fastens with common nails or Strong-Drive® SD Connector screws
• Engineered for nominal 4×4 posts and increased uplift capacity for wind or seismic loads

⚠️ WARNING: This product can expose you to Tetrabromobisphenol A known to the State of California to cause cancer and Epichlorohydrin known to cause birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.