Simpson Strong-Tie PBST ZMAX Galvanized Standoff Post Base for 4x6 posts is a cast-in-place post base engineered to deliver high-performance wood-to-concrete connections for decks, patio covers, porches, and other outdoor structures. Built from heavy-gauge steel with a ZMAX galvanized finish, this standoff post base keeps wood posts elevated 1 inch above concrete - protecting against moisture-related rot while meeting code requirements for residential and outdoor construction. Whether you're framing a new deck or reinforcing a patio cover, this connector offers the structural reliability and corrosion resistance demanded by exposed, weather-prone applications.

Key Features

• 1 in. standoff between post and concrete - meets code requirements and helps protect wood posts from moisture contact and decay
• S-shaped stiffening tabs enhance load-bearing performance - increase download capacity so the base handles demanding structural loads with confidence
• Compatible with nails, bolts, or Strong-Drive SD Connector screws - gives installers flexibility to use the fastener type that best fits the job
• Designed for flush installation in wet concrete with shallow embedment depth - simplifies the pour process and reduces the precision required during concrete placement
• Embossed vertical straps increase overall strength and stability - contributing to a more rigid, long-lasting post-to-concrete connection
• Base 12 ga. steel; strap 14 ga. steel - heavy-gauge construction provides the structural integrity needed for load-bearing outdoor posts
• ZMAX galvanized coating offers superior corrosion resistance - ideal for outdoor applications, wet environments, and use near pressure-treated lumber where standard coatings may fall short

Why This Product

• The 1 in. standoff design keeps wood posts separated from concrete, reducing moisture exposure and extending the service life of structural posts in decks, porches, and patio covers.
• The ZMAX coating provides enhanced galvanized protection compared to standard finishes, making this post base a dependable choice for outdoor structures exposed to rain, humidity, and weather cycling.
• S-shaped stiffening tabs and embossed vertical straps work together to maximize download capacity and rigidity - meaning fewer concerns about structural performance under heavy vertical loads.
• Installation flexibility with nails, bolts, or Strong-Drive SD Connector screws means this base fits seamlessly into a wide range of job site workflows without requiring specialized fastener systems.

Specifications

• Brand: Simpson Strong-Tie
• Member Size: 4x6
• Gauge: Base 12; strap 14
• Coating: ZMAX
• Finish: ZMAX
• Country of Origin: United States

Available Pack Options

• PBST46Z: 1 Ea
• PBST46Z -10: 10 Pk

Install With

• Install with (14) 0.162 in. x 3-1/2 in. nails, (14) #10 x 1-1/2 in. Strong-Drive SD Connector screws (SD10112) or (2) 1/2 in. diameter bolts

Frequently Asked Questions

What size post is this standoff post base designed for?

This PBST post base is specifically sized for 4x6 nominal lumber posts, making it appropriate for structural applications such as deck posts, patio cover columns, and porch supports where a 4x6 member is specified.

Why does this post base have a 1 in. standoff, and is it code compliant?

The 1 in. standoff keeps the wood post elevated above the concrete surface, helping to prevent moisture from wicking into the end grain of the post and causing rot over time. This standoff distance meets code requirements for post base installations in outdoor structural applications.

What makes ZMAX coating different from standard galvanized coatings?

ZMAX is a heavier zinc coating that provides superior corrosion resistance compared to standard hot-dip galvanized finishes. It is specifically designed for outdoor and weather-exposed applications where moisture, rain, and humidity can degrade lesser coatings over time, making it well suited for deck and patio structure hardware.

How is this post base installed, and can it be used with screws instead of nails?

This post base is designed for flush cast-in-place installation directly into wet concrete at a shallow embedment depth. Once set, the post can be secured using (14) 0.162 in. x 3-1/2 in. nails, (14) #10 x 1-1/2 in. Strong-Drive SD Connector screws, or (2) 1/2 in. diameter bolts - offering flexibility based on the tools and fasteners available on the job site.

Note: Product dimensions and/or screw or bolt holes may differ from picture.