4x4 Post Base

Overview

The 4x4 Post Base (717205) is designed for anchoring 4x4 posts or columns to concrete surfaces with a code-compliant 1-inch standoff clearance. Manufactured by Simpson Strong-Tie, this composite standoff base provides a reliable structural connection while protecting the base of the post from ground moisture and concrete contact.

Technical Features

• Composite construction: The standoff base is fabricated from a composite material, providing corrosion resistance for extended service life in outdoor and exposed concrete environments.
• 1-inch code-required standoff: Elevates the base of the post 1 inch above the concrete surface, meeting code requirements and reducing direct contact between wood and concrete.
• Increased concrete surface area design: The base geometry is engineered to distribute load over a larger concrete contact area, improving connection stability at the foundation level.
• Moisture barrier separation: The standoff geometry keeps the bottom of the post clear of the concrete surface, reducing moisture infiltration and potential wood decay at the post base.
• Defined fastener specification: Installs with a 5/8 in. anchor bolt and 4-10D nails, providing a consistent, repeatable installation process with no ambiguity in fastener selection.
• Compact footprint: At 3.25 in. x 3.25 in. x 1 in., the base is sized specifically for 4x4 posts or columns, minimizing material use while maintaining a secure fit.

Applications

• Anchoring 4x4 structural posts to concrete footings, piers, or slabs
• Deck post base connections requiring code-compliant standoff clearance
• Pergola, carport, and fence column installations on concrete surfaces
• Any application requiring a corrosion-resistant post-to-concrete connection with moisture separation