Versatile Front Loading Commercial Mailbox with 15 Tenant Doors and 3 Parcel Lockers

Florence provides an unrivaled five-year warranty on its products, starting from the date of shipment when purchased from an Authorized Florence Mailboxes Dealer like Budget Mailboxes. For full details on the product warranty, visit our Florence product warranty page.

Effective October 5, 2006, all new designs approved for New Construction and Major Renovations require U.S. Postal Service STD-4C compliant mailbox systems. The new USPS 4C Standard includes the following specifications:

• A new compartment form factor minimum size requirement of 12 in. w x 15 in. d x 3 in. h
• Eliminates the vertical form factor (5 in. w x 6 in. d x 15 in. h) design
• Introduces a parcel locker requirement based on a 1:5 parcel locker to customer compartment ratio
• Strengthens security requirements for the entire receptacle
• Standardizes and improves tenant compartment lock design
• Adds testing requirements to verify acceptability for either indoor or outdoor use.Introduces quality management systems provisions
• Enhances design flexibility for concept, ergonomics, and materials
• Meets Americans with Disabilities Act (ADA) standards

The following design and security features are the industry standard for all 4C Mailboxes:

• Pre-configured modules with integrated parcel lockers in 14 different height options
• Thick, reinforced collection door to prevent theft
• Master front-loading door with interlocking, overlapping seams to prevent prying
• Integrated outgoing mail collection compartment with weather-protection hood and anti-fishing comb
• Single-piece extruded door hinge to prevent prying
• Solid aluminum frame protects adjacent customer/collection compartments

Exclusive to Florence Mailboxes 4C Mailboxes:

• Hardy stainless steel latching hook cam on every tenant door with double-latching cam on all oversized doors
• Double-latching parcel locking mechanism design for added door security and strength
• Multi-unit connector kit hardware supplied with every module for easier installation across larger openings

4C mailboxes are designed to meet or exceed the USPS specifications. See here for more details.

This may be the most common question guiding a customer's search for the right 4C mailbox, as it should be. The options are diverse: you can purchase a single 4C mailbox for 1 tenant or configurations with 20 tenant boxes and 4 parcel lockers.

If you already know the number of tenant doors you need but aren't sure which configuration to choose, here are some questions you can answer to help guide you before purchasing:

• What size tenant doors do you need? The 4C mailbox offers tenant boxes in three sizes: MB1 (standard), MB2, and MB3. The higher the number after the "MB", the taller the tenant box. So:
  • An MB2 slot is 6 ¾ in. High
  • An MB3 slot is 10 ¼ in. High

• Do you need parcel lockers included with your mailboxes?
  • Note: the USPS requires one parcel locker for every five (5) tenant boxes, which is why we sell multiple 4C configurations that already include the required number of parcel lockers.
  • If you purchase 4C mailboxes without parcel lockers, we recommend choosing recessed parcel lockers in the same height class so that the two units will match aesthetically (see more info on Height Classes).

In a nutshell, here are the key differences between a USPS approved and a private delivery 4C horizontal mailbox:

• A USPS approved mailbox meets USPS regulations for height, width, installation location, ADA accessibility compliance, and compartment size. Luckily for you, we already designate the mailboxes that meet these criteria, so all you really need to know are:
  • The number of tenants that will need access to the mailbox
  • The type of installation: whether the units will be recessed into an existing wall, mounted to an existing wall via surface mounted enclosures, or free standing in a 4C mailbox kiosk

(Note: if you find any of this confusing at first, don't worry. We cover these topics in Installation Types and Options below).

• A mailbox for private delivery doesn't have to meet any of the USPS regulations since it will be serviced by an in-house mail department. This is most common with universities, dorms, or organizations that distribute mail in-house. If you purchase a commercial mailbox for private use, the appropriate lock will be installed and keys will be included with the unit.

If you want the gritty details on USPS specifications, we recommend you visit this article as it contains a thorough overview of height regulations, ADA compliance,* and how to choose mailboxes in the same height class (typically for architects or developers).

*Note: all 4C compliant mailboxes must meet USPS design and installation requirements to be USPS Approved. Accessibility regulations may vary locally and regionally, so we encourage you to always consult local building codes for the accessibility requirements related to your mailbox project. (See Installation and Accessibility References for additional details.)

Front Loading

Front-loading mailboxes include a Master Loading Door prepared for the USPS Arrow Lock, which provides easy access to all compartments by the US mail carrier. Note: the USPS provides and installs their arrow lock, so you will not find arrow locks included with your mailbox.

Front-loading units are usually more common, whereas rear loading units tend to be less common as they require the mail carrier to load and retrieve mail from a secure room located behind the recessed mailbox (more about rear loading below).

Rear Loading

If you haven't already guessed, the rear-loading mailbox is accessed from the back. These mailboxes include hinged and latching rear doors that are accessed by a secure mail room for USPS use. They do not have a front master loading door. Since there is no locking mechanism on the rear doors, a secure mail room behind mailboxes is required to keep mail secure.

If you still aren't sure whether you need a front or rear loading configuration, contact us and we will help you decide on the best option to fit your specific needs.

• Step 1 - Select "Custom Layout Required" from the dropdown option labeled Door ID Layout.
• Step 2 - After you place your order, we will email you the layout form for you to customize.
• Step 3 - After you've completed and signed the form, email it back to us and we will finalize your order.
• Important: To ensure a custom layout is processed correctly, we ask that you complete this form after completing your purchase. For your convenience, we will also email you a copy of the form after your order is placed (note: this only applies if you select Custom Layout from the dropdown options).

Customers purchasing a 4C Mailbox with Standard Numbering or Custom Numbering applied top-down from left to right do not need to fill out this form.

Recessed

All 4C Horizontal Mailboxes are sold as recessed units, meaning that they will be installed into a wall. The installation requirements are usually set out in the development's architectural planning. We provide detailed technical docs for each 4C Door Height class as well for each individual 4C model within those classes. Check the Related Downloads tab for available specification documents or, if you can't find what you're looking for there, give us a call at (866) 707-0008.

Surface Mount Collar

(only for front loading mailboxes)
If you do not intend to recess your 4C Mailboxes into a wall, you can mount them to the wall directly using a surface mount collar. The collar is installed to the wall, either indoors or outside, and the matching 4C mailbox is recessed into the collar instead of the wall itself. This is sometimes a more practical solution for developments where recessing into a wall is not possible or for limited wall-depth projects.

Free-Standing Depot

(only for front loading mailboxes)
In addition to a surface mount collar, customers also have the option to purchase a free-standing mailbox depot. You do not have to mount these depots (or mail kiosks) to a wall, but can place them in a convenient location either inside or outside the building, provided the location meets local USPS requirements for delivery. You would then recess the 4C mailbox into the depot enclosure.

Florence Manufacturing USPS Approved 4C mailbox products are designed to adhere to STD-4C regulations. To ensure your project complies with USPS regulations for wall-mounted mailboxes, your mailbox center must be installed according to the following U.S. Postal Service guidelines:

1. At least one customer compartment shall be positioned less than 48 inches above the finished floor.
2. No parcel locker compartment (interior bottom shelf) shall be positioned less than 15 inches above the finished floor.
3. No customer lock shall be located more than 67 inches above the finished floor.
4. No customer compartment (interior bottom shelf) shall be positioned less than 28 inches above the finished floor.
5. The USPS Arrow lock shall be located between 36 and 48 inches above the finished floor.
6. For multi-point residential deliveries (apartments, condos, student housing, etc.), all new or remodeled installations must include at least 1 parcel locker for every 5 mailbox compartments.

To view more details regarding installation requirements, visit this page in our resource center.

Give your 4C mailbox installation the finishing touch by adding complimentary accessories. These options provide additional conveniences your residents and property managers will appreciate. Most 4C mailbox accessories are USPS Approved, as well.