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Internet #100374896

Model #ABU66Z

Store SKU #501728

Store SO SKU #592854

ABU ZMAX Galvanized Adjustable Standoff Post Base for 6x6 Nominal Lumber

  • Adjustable post base designed for versatility
  • Great for use on patios and decks
  • Easy to install
  • See More Details

Frequently Bought Together


Product Overview

Deck Glamour Photo

Deck It Out

Strong decks bring beauty and entertaining space to your outdoor living area

Deck Glamour Photo

Make Your Deck Beautiful and Safe

Building a safe, strong deck starts with the proper connectors and fasteners

Photo of a deck being built

Deck Building Tips and Tricks

Installing corrosion-resistant connectors and fasteners helps extend the life of your deck

SDWH Screw being installed into ledger

Ledger connections critical for deck safety

Strong-Drive® SDWH Timber-Hex HDG screw delivers high-strength, wood-to-wood connectivity, such as deck ledger applications

DTT2Z guardrail install

Guardrail Installation Tips and Tricks

Don’t take chances with guardrail connections. DTT2Z deck tension ties fasten guardrails to deck framing.

DTT1Z install

Securing the Deck to the House

Install DTT1Z as a tension tie to meet building codes and eliminate the need to access to the floor joists inside the home

LSCZ install

Take the Step to Secure Deck Stairs

LSCZ adjustable stair-stringer connector offers a concealed connection between the stair stringer and the carrying header or rim board

Tight LUS26Z install shot

Joist Hangers

Provides bearing and uplift resistance

Tight H1 install shot

Hurricane Ties

Ideal for preventing lateral movement of joists

Tight SD screw install photo

SD Connector Screw

The only screw approved with Simpson Strong-Tie connectors

Tight install shot of LCEZ4

Post Caps

LCEZ end post caps provide a post-to-beam connection in new or retrofit deck applications

Tight PBSZ install photo

Post Base

Features a 1 in. standoff to resist wood decay

Stainless-steel connector product shot

Prevent Corrosion

Deck-Drive DWP stainless-steel fasteners are recommended for higher-exposure environments or applications

Post and Column Bases secure the bottom of posts or columns to concrete and are perfect for decks or patio covers. Models are available for attaching to existing hardened concrete, wet concrete, as well as wood. The AB series also offers adjustability around the anchor bolt to achieve optimum post placement. And many models provide a 1 in. standoff from the concrete to help avoid post-end rot from moisture.
  • Attaches a post to existing concrete for decks, patio covers and other top-supported structures
  • Features 1 in. standoff to help prevent rot at post end
  • Slotted for adjustability
  • Designed for versatility, cost-effectiveness and maximum uplift performance
  • Nominal post size: 6 in. x 6 in.
  • Made from 10-Gauge steel
  • Z-MAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
  • Install with 16d common nails
  • Shop all Simpson Strong-Tie here.

Info & Guides

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Nominal Post Size (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Base Type
Standoff Post Base
Connector Finish
G185 Galvanized
Fasteners Included
Fasteners Not Included
No Additional Features
Material Connector Compatibility
Wood to Concrete
Number of Pieces
Package Quantity
Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
Limited Warranty

Questions & Answers


Are these post base compatible with green treat posts?

Asked by Linda March 25, 2021

The ABU66Z has the Z-MAX finish which provides a medium level of corrosion protection and can be used with treated wood in many applications. Please see the Corrosion information at the following link to determine the recommend finish based on the treated wood being used and the environment where it is being installed: https://www.strongtie.com/solutions/corrosion. Thank you!

What should I do if the cap plate touches the top of the anchor bolt nut? The included washer is...

Asked by Bill December 13, 2020

Have you installed ABU66Z with a square washer that was supplied with the base and round washer that was supplied with Grip-Rite anchor bolt? If so, that may be the problem. Do not use the round washer - just the square thick washer and nut. Regards.

Would this adequately support a post to which a heavy gate is attached or would I need to use L-b...

Asked by Vic September 7, 2020

Is the post supported at the top? If so, the post base is probably adequate. If the post is free standing, definitely not.

How do you anchor this brace in concrete

Asked by Jeff May 3, 2020

The ABU66Z anchors to the concrete with a 5/8" diameter anchor; it is up to the Designer/Engineer of Record to specify the anchor bolt type, length and embedment. There isn't enough information provided, but please feel free to call our Engineering Support Department (800-999-5099) with further details and while we cannot specify, they can direct you to anchorage options. Thank you!

I am going to use this one to support a 6x6 post. The post height is about 1.5 ft. I am going to ...

Asked by Gary April 30, 2020

Yes, these are designed for use w/ 1/2" anchor bolts. Be very precise on how much bolt protrudes so you don't have to trim them - thickness of bracket, washer, lock washer, nut & a thread or two. Built a cabin resting on 6x6's notched to hold double 2x6 carrying beams. Rock solid!

The instructions say to use 16d (3.5" nails) but the post is a 6x6, so its only 5.5" wide. Wont t...

Asked by Curious December 22, 2019

I didn't use nails, I used 1/2 inch bolts, 13 thread and nuts. I drilled through those two holes in the Simpson Strong-Tie (1/2 inch) and secured it with two bolts.

The description says 12 gauge and the specifications say 10 gauge. Which is it?

Asked by Leo April 22, 2019

Actually both...the base portion of the ABU66Z is 12 gauge and the strap portion is 10 gauge. Thank you!

Can post base be installed on existing concrete slab? How can I installed it?

Asked by FN November 10, 2018

Yes would be my answer... I drilled a hole with a hammer drill, put in some cement specific epoxy in the hole, dropped a stainless steel bolt in, and allowed to cure. Waited for the following weekend to put up a huge pergola, and it’s been solid ever since... I hope that helps

Can this base be installed with Simpson SD structural screws #10 2-1/2” in place of 16d common na...

Asked by olsaff October 5, 2018

No, but it can be installed using bolts, see Simpson Specifications

Can this base be installed using the Simpson Strong-Tie Outdoor Accents washer and the 3-1/2” lon...

Asked by olsaff October 5, 2018

The ABU66Z has not been evaluated with the Outdoor Accents washer and screw. We can only support the installation of the ABU66Z with the specified fasteners (a quantity of 12 - 16d common nails OR 2 - 1/2" diameter machine bolts to the post; 5/8" diameter anchor to the concrete). Thank you!

ABU ZMAX Galvanized Adjustable Standoff Post Base for 6x6 Nominal Lumber - page 2

Customer Reviews

  • 4.9
    out of 34 reviews
  • 100% recommend this product
Filter by:
Showing 1-10 of 34 reviews
Product very study and came well packaged. Only complaint is the width of the standoff was close...
Product very study and came well packaged. Only complaint is the width of the standoff was closer to 5.75 inches versus 6.00 inches. Ended up shaving off about 1/4 inch to make it fit with my post. Used the recommended heat treated nails to attach to the post, and added in a couple Simpson Strong support braces for the two open sides. Worked well, just wish the dimensions were truly 6 x 6.
by David
1 person found this helpful
Product was great, easy to use....
Product was great, easy to use.
Perfect for 6 by 6 post...
Perfect for 6 by 6 post
by Sergio
These are the post bases you want for any application...
These are the post bases you want for any application involving a concrete further or Pier. They make a variation for rough cut six by sixes as well
by Handyman
Big strong brackets but there crazy expensive Simpson offers cheaper...
Big strong brackets but there crazy expensive Simpson offers cheaper options
by Dmc37115
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Heavy duty, much better than the flimsy gauge alternatives in-store....
Heavy duty, much better than the flimsy gauge alternatives in-store. Worth the waiting on shipping to install 6x6's on concrete.
by OldDeckHand
Good product if you are replacing a previous base cast...
Good product if you are replacing a previous base cast into the concrete. Simple anchor bolt epoxied in does the job.
by HomeDepotCustomer
by HomeDepotCustomer
This is a heavy-duty post anchor that allows you to...
This is a heavy-duty post anchor that allows you to use 1/2-in bolts or lag screws to secure the timber you're mounting. the base plate covers the 5/8" anchor bolt and heavy-duty washer (the washer is included) used to secure the base and keeps the post off of the ground. If the base is level, the base plate allows the post to automatically level with minimal effort. Very high quality.
by SpasticLabRat
Showing 1-10 of 34 reviews