#1 Home Improvement Retailer

Internet #100375066

Model #DPT7Z

Store SKU #464554

Store SO SKU #592854

DPTZ ZMAX Galvanized Deck Post Tie for 4x4 Nominal Post

  • Attaches vertical posts to the side of wood members
  • Typically installed in pairs
  • Easier to install than through-bolting
  • See More Details

Frequently Bought Together


Product Overview

Simpson Strong-Tie connectors make projects easier to build while making them stronger and safer. They are engineered and tested to perform and are manufactured to the highest quality standards. The DPT7Z deck post tie is used to attach 4x4 vertical posts to the side of stringers, rims or other wood members.
  • Connects a 4x4 post to the outside of stair stringers and rim joists on decks or stairs in new or retrofit construction
  • Easier than through-bolting
  • Nominal post size: 4x4
  • Made from 14-gauge steel
  • ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications
  • Typically installed in pairs
  • Install with 3/8 in. Dia machine bolts and 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws
  • 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.



Product Depth (in.)
Product Length (in.)
Product Width (in.)
1.5 in


Color Family
Connector Finish
G185 Galvanized
Connector recommendation
Post Tie
Fasteners Included
Fasteners Not Included
No Additional Features
Number of Pieces
Package Quantity
Product Weight (lb.)
Staggered Nail Pattern
Not Staggered
Strap Type

Warranty / Certifications

Manufacturer Warranty
Limited Warranty

Questions & Answers


Can this tie be used to attach 36 inches deck posts, which will be 12 inches above the ground?

Asked by Dave May 14, 2021

@Bob, I have planned to put railings for my deck, which is only 12 inches above the ground. My 4x4 posts will be 36 inches, excluding the bottom parts, which will be attached to the perimeter joists. I wonder if I can use LedgerLOK structural screws instead of lag bolts? Thank you!

Are tension ties required when installing these deck post ties? And do they meet standard code re...

Asked by Javier December 26, 2020

Tension ties, such as DTT2Z, are used in the case where a post is fastened directly to floor system with through-bolts. DPTZ does not require tension ties. You may want to contact your local building department to inquire if the connector is acceptable solution in your municipality.

What are the largest size fasteners that can be used in this bracket for the joist and post? Tha...

Asked by BBill July 21, 2020

We used 3/8 x 1 1/2 inch galvanized steel lag bolts for the big holes that attach to the 2x4 and #8, 1 1/2 stainless steel wood screws for all the other smaller holes that attach to the post.

can this be used for ground contact or be buried underground?

Asked by Dodo September 14, 2019

It’s galvanized so it should do OK with ground contact.

Are 2 of these code for a deck post on railing?

Asked by travisa July 23, 2019

The DPTZ is not code listed. Please see the T-C-GRDRLPST17 Technical Bulletin on our website for Code-Compliant Guardrail Post Connections. Thank you!

I have exactly 4X4 post due to composit covering ( not 3.56 inch X 3.56 inch) will this work or i...

Asked by Frank April 2, 2019

Don’t think so. The brackets I used were tight on a standard 4x4 pt post. One bracket was so tight that I had to get another.

need 3 in x 3 in x 3 in for my 3 inch post......4 in won't work??

Asked by tom August 11, 2017

Too large. Use blocking

I am installing a privacy fence that abuts to a neighboring fence so I can't screw the panels ont...

Asked by jawmaw June 5, 2017

Depends on several things. Size of the panels’ * Length * Height * Material * Thickness Also how far the posts are spaced. For example; a fence made of 1/2” PT yellow pine in 8’ sections that are 6’ tall requires at least three 4”x4” posts, where as a fence made of 1/4” PVC in 6’ sections that are 4’ tall only requires two 4”x4” posts.

do you have this post in 6X6

Asked by 2503 January 15, 2013

I'm sorry to say it is not available in a 6x6 size. The DPT Deck Post Ties are only available in the 4x4 size shown here (DPT7Z) or a 2x4 size (DPT5Z). Thank you!

Customer Reviews

  • 4.6
    out of 36 reviews
  • 83% recommend this product
Filter by:
Showing 1-10 of 36 reviews
They worked great for securing our 4x4 square fence post to the 2x4 boards for extra strength and...
They worked great for securing our 4x4 square fence post to the 2x4 boards for extra strength and stability from the inside of the fence. Our actual post size is a little 3 1/2 inch, not quite 4 but these fit perfect. For anyone wondering, the lip part is a little over an inch so is flush against your 2 x 4 that you are attaching it to but attaching these on each 2x4 on your post will help tremendously during high winds being you secure your board or panels from the outside to your posts. So we have 3 on each post but for all the hard work of building and staining the fence it's worth it to hopefully make it last as long as possible. We live in Florida and being from Louisiana or any hurricane prone area this is a must unless you want to take a chance of your fence possibly laying flat on the ground like I have seen so many do after a storm. Now they are galvanized steel so if you want to paint them to blend in with your fence then you have to use something to make the paint bond to galvanized steel. So after much research, we learned that Rust Oleum Universal "bonding" primer first, let dry and then paint the color you want with a metal suitable paint. If you don't do the first step then your paint will will just peel right off. We painted ours and used stainless steel hardware and then gave the hardware a quick spray after installed to blend in. I attached photos to show before and after but fence feels super sturdy now!
by duece2cajun
2 people found this helpful
Easy install for the posts i needed
Easy install for the posts i needed
by Nd55
These were a lifesaver!
After deciding I didn't want to pay $10k (had 3 estimates) to have someone else replace my 20 yr old wooden fence I started pricing to do the job myself. The worst part was the possibility of needing to replace about 60 4x4 posts around the yard. The fence panels were all rotted out and falling apart, but the majority of the posts were in pretty good shape...except where the panels were attached and the hardware wore out the wood. I bought a bunch of these post ties and used them to go around the posts and they attach to the ends of the fence panels where they meet at the post. I used 1/4-20 hardware to attach the panels and just used some #8 deck screws to help secure this bracket to the post. These brackets saved me many hours of hard work and hundreds of dollars by not having to buy lumber and concrete, I didn't need to rent a post hole digger and my new fence is 100 times more secure than the original one. After pressure washing the old posts (done after the pic) they don't even look old. I was able to put up a new fence for under $3,000.
by kismet1113
7 people found this helpful
by HomeDepotCustomer
Not 4X4!!
Not for 4x4, ordered 2 of these online and they are for 2x4’s, good thing they are cheap!
by Ryan
Did the job. Good product.
Did the job. Good product.
by Dan
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Sturdy metal, sized perfectly for a snug fit around pressure-treated...
Sturdy metal, sized perfectly for a snug fit around pressure-treated 4x4 posts.
by DanG
Showing 1-10 of 36 reviews