The Simpson Retrofit Post Base for Double 2x4, ZMAX RPBZ is a heavy-duty connector from Simpson engineered to reinforce existing posts and columns where the original post-base connection needs strengthening. A single versatile model accommodates any nominal double 2x4 or larger post, making it a practical solution for both retrofit upgrades and new post-base connections on structures such as braced carports, patio covers, trellises, and decks. Built from 12-gauge steel with a ZMAX galvanized finish, this retrofit post base is suited for a broad range of exposure conditions and can be configured to resist both wind and seismic forces.

Key Features

• Reinforces existing posts and columns - allows homeowners and contractors to strengthen aging or under-built post-base connections without full replacement, saving time and materials.
• Fits any nominal double 2x4 or larger post - a single model covers a wide range of post dimensions, reducing the need to source multiple brackets for different applications.
• Suitable for new post-base connections on carports, patio covers, trellises, and decks - versatility across both retrofit and new construction applications makes this bracket useful across a variety of projects.
• Made from 12-gauge steel - heavy-gauge construction provides the structural strength needed to resist both wind and seismic forces at the post-base connection.
• ZMAX galvanized finish - delivers enhanced corrosion resistance compared to standard galvanized coatings, making this connector well suited to demanding exposure conditions in outdoor and treated-lumber environments.
• Flexible installation configurations - a single bracket works at corner-flush conditions, and two brackets can be used at away-from-edge conditions to further fortify the connection against lateral loads.

Why This Product

• One bracket, many post sizes - because the RPBZ fits any nominal double 2x4 or larger post, it eliminates the guesswork of matching a specific connector to a specific post dimension, making it a go-to solution for mixed-size column retrofits.
• Built for both wind and seismic resistance - the RPBZ is specifically designed to fortify post-base connections against the two most common lateral load demands, giving builders and inspectors confidence in the connection's performance.
• ZMAX finish for long-term durability outdoors - the standard ZMAX galvanized coating means this bracket is ready for exterior applications without requiring an upgraded finish at additional cost.
• Works across retrofit and new construction - unlike single-purpose connectors, the RPBZ addresses reinforcement needs on existing structures while remaining fully applicable to new-build projects such as patio covers and braced carports, providing lasting value across multiple project types.

Specifications

• Model Number: RPBZ
• Member Size: Double 2x4 or larger
• Gauge: 12
• Coating/Finish: ZMAX
• Country of Origin: United States

Approved Applications

• Reinforcing existing posts and columns
• Braced carports
• Patio covers
• Trellises
• Decks
• New post-base connections on other structures requiring wind and seismic resistance

Frequently Asked Questions

What post sizes is the RPBZ compatible with?

The RPBZ is designed to fit any size post consisting of a nominal double 2x4 or larger, making it a single, versatile solution for a wide range of post dimensions.

Can the RPBZ be used on new construction as well as retrofit applications?

Yes. While the RPBZ is specifically designed to reinforce existing posts and columns, it can also be used to reinforce new post-base connections such as braced carports, patio covers, trellises, decks, and other structures.

What finish does the RPBZ come in, and why does it matter?

The RPBZ comes standard in a ZMAX galvanized finish, which is engineered to meet exposure conditions in many environments, providing enhanced corrosion resistance compared to standard galvanized coatings.

How many RPBZ brackets are needed to meet away-from-edge installation requirements?

A single RPBZ can be installed on a post that is flush to a corner, while two RPBZs can be installed at away-from-edge conditions to fortify the post-base connection and resist both wind and seismic forces.