How to install a USPS Cluster Mailbox
In the video below, an Auth-Florence dealer based out of Chicago provides a step-by-step tutorial on how to install your cluster mailbox according to USPS specifications. The video was created by Auth-Florence Manufacturing. We have also provided a transcription of the video for your convenience below.
The Concrete Pad
The first step is to pour (or have already poured) a concrete pad that meets US Postal specifications. For more detailed information on the concrete pad specifications, please view the concrete foundation spec sheet (opens in a PDF).
When you open up the carton for the pedestal, you have a gasket and a template also. Follow the steps below to install your CBU pedestal into the concrete pad:
- Locate the center of the pad, put the mounting template down, and then start drilling your holes (using the template). Note: anchor bolts will have to be installed in the concrete pad itself. For more information, see here.
- Drill down at least five and three-quarters with a half-inch drill bit.*
- Make sure the surface is clear of rocks and debris.
- Once the area is clean, place the gasket down on the concrete (this serves as a barrier between the cement and the pedestal).
- Now place the pedestal on top of the gasket. If it's not level, you can add washers to the uneven side.
- Once the pedestal is level, you can place your anchors, which are five and a half inches long by one-half inch wide.**
- Place the anchors into the holes and torque the bolts down until they're tight using a socket wrench (you can also use an impact wrench to tighten the bolts).
- Once you've tightened the bolts, double check that the pedestal is level.
* In the tutorial video, the installer drills down 4-1/2 inches.
** In the same tutorial video, the installer uses anchors that are 4-1/4 inches long. Our anchor bolts are 5-1/2 inches long, according to the manufacturer's minimum requirements.
The Cluster Box
Upon receiving the boxes, open them up to make sure the engraving is correct (if you selected engraving) and that there's no damage. Two people should place the box on the pedestal stand -- this way, one person can hold the box while the other person fastens it to the pedestal.
To fasten the box:
- Inside the box, there will be access plates in the parcel locker(s). Go ahead and slide those out.
- This will allow you to access the hardware to secure the box to the pedestal.
- Place the washer on the bolt, followed by the nut. Do this to all four top bolts.
- Ratchet the nuts with a nine-sixteenths (9/16) socket wrench.
- Once these bolts are tight, return the access plates you removed from the parcel locker(s) in step one to cover the hardware.
Once complete, close up the box. Now, you will need to contact the post office to send someone to install their arrow locks for USPS access. The postman will install one arrow lock in the outgoing mail slot, and one in each parcel locker.
After you install the CBU, check the keys included with the unit to make sure they all work propertly. (Not sure where to find your keys? See this blog article.)
Also, another good habit is to take the yellow Important Notice sticker on the outgoing mail door and put it over the arrow lock hole so that nobody tampers with the unit.
As you can see, it's a basic process that takes some simple tools and a little time. We also strongly recommend you view and/or download the complete 1570 Cluster Box Instruction Manual. If you have any other questions about installing your pedestal cluster mailbox, feel free to call us at (866) 707-0008.
The official cluster mailbox installation instructions can be found here. Download PDF for printable version.