#1 Home Improvement Retailer

Internet #205227048

Model #ABU88Z

Store SKU #1001616303

ABU ZMAX Galvanized Adjustable Standoff Post Base for 8x8 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. 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: 8x8
  • Steel gauge: Base 14, strap 12
  • ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
  • Install with 0.162 in. x 3-1/2 in. nails
  • Shop all Simpson Strong-Tie here.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.



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


what kind of screws/bols can i use to attach the post to the base?

Asked by jepz January 14, 2021

8x8 timber post can be fastened to ABU88Z base with either 18 - 16d(0.162")x3 1/2" common wire nails through the smaller diameter holes or 8 - 1/4"x3" SDS wood screws (model # SDS25300) through the larger holes. The nails need to be hot-dip galvanized. The screws are also sold at Home Depot. Regards.

Do you use nails or screws to fasten post to anchor

Asked by Nad March 22, 2019

The ABU88Z anchors to the concrete with 2 - 5/8" diameter anchors and the post attaches to the base with 18 - 0.162 x 3 1/2" nails. Thank you!

Will this Post Base works with an 8"x10" Cedar Post?

Asked by BoBoReynolds62 March 17, 2019

If you don’t mind the overhang it should work fine.

Can this be used for a 6" x 8" post?

Asked by Mandalay November 5, 2018

We would not recommend the ABU88 be used with a 6x8 post. There are various concerns including water sitting on the standoff (if exterior), load reductions (post won't bear on the vertical edges of the standoff which take a lot of the load), we do not have testing for the condition and fasteners would be close to the edge of the 6x post. We would suggest the ABU66 and let the post hang over. There would be no load issues in this condition other than the fact that it would be limited to the ABU66 loads(which are pretty close to the ABU88 loads). Thank you!

Will this work for a 6" x 8" post?

Asked by Mandalay November 5, 2018

This model is for 8'' x 8'' posts.

Will this fit a true 8x8 post

Asked by Mlucas March 16, 2018

No. I had to do some creative metal bending. I wasn't difficult with a sledge hammer and screws.

What is the rated upload resistance for this unit if used with Red Head Wedge Anchors that are 5/8" X 5"

Asked by gtbecker April 25, 2016

The ABU88Z has an allowable uplift capacity of 2,320 lbs., but is up to the Designer/Engineer of Record to design the anchorage and specify the anchor bolt type, length and embedment. There are various factors to be considered (i.e. concrete strength, how close to the edge the anchors will be installed, etc.). Thank you!

Customer Reviews

  • 5
    out of 11 reviews
  • 100% recommend this product
Filter by:
Showing 1-10 of 11 reviews
These are not TRUE 8X8 in. Actually 7.5x7.5 in. I needed these for 8x8 cedar posts for my back po...
These are not TRUE 8X8 in. Actually 7.5x7.5 in. I needed these for 8x8 cedar posts for my back porch. The cedar posts are true 8x8 inches, therefore I had to do some creative metal bending. This was OK because I will be covering the lower part of the post with stone veneer. The metal base will not be seen for my project.
by Troy
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Works like a champ, just what I needed....
Works like a champ, just what I needed.
by Rich
I give the Simpson Strong-Tie an Excellent rating but Home...
I give the Simpson Strong-Tie an Excellent rating but Home Depot gets a Very Poor rating for taking so long delivering the product to their store.
by John
They worked.
They worked.
by Danielle
I’m no contractor but my structural engineer suggested these in...
I’m no contractor but my structural engineer suggested these in his plan. After ordering them and looking at the quality, it seems that they are the gold standard for strong ties. They cost quite a bit but knowing that my engineer suggested these makes me sleep soundly at night.
by Alex
Very heavy duty...
Very heavy duty
by Mike
The product worked very well, and is in compliance with...
The product worked very well, and is in compliance with the national building code.
by Ron
As advertised ...
As advertised
by HomeDepotCustomer
Great solid product that worked great as the base to my “Yellawood” brand Colums for my pergola.
Great solid product that worked great as the base to my “Yellawood” brand Colums for my pergola.
Showing 1-10 of 11 reviews