Salsbury Industries 3615AFU 4B+ Horizontal Mailbox

Product Description

The SALSBURY INDUSTRIES 3615AFU is a 4B+ horizontal mailbox designed for front-loading mail delivery with USPS-approved access. Built from aluminum with a silver finish, this unit features 15 door openings, 14 of which are usable tenant compartments, along with one outgoing mail slot. It is engineered for multi-unit residential and commercial installations requiring USPS 4B+ compliance. The all-aluminum construction keeps weight manageable at 60.5 pounds while providing corrosion resistance for both indoor and sheltered outdoor applications. Property managers, postal contractors, and licensed installers typically specify this unit for apartment complexes, condominiums, and office buildings.

This mailbox is suited for multi-tenant residential buildings, commercial properties, and mixed-use developments where centralized USPS-compliant mail delivery is required. The front-loading configuration allows the mail carrier to load from the front of the unit, making it compatible with USPS 4B+ delivery standards. With 14 usable tenant compartments, it serves medium-density installations in lobbies, mail rooms, or covered alcoves. The unit ships as a single package and is intended for permanent wall or pedestal mounting.

Key Features

• USPS 4B+ compliant front-loading design for carrier access
• 15 door openings with 14 usable tenant compartments
• Aluminum construction with silver finish for corrosion resistance
• Compact footprint at 20 inches long, 26 inches wide, and 33 inches tall
• Single-unit package at 60.5 pounds for straightforward freight handling

Compatibility

Designed as a USPS 4B+ compliant horizontal mailbox for multi-tenant residential and commercial installations requiring front-loading carrier access.

Installation Notes

Installation should be performed by a qualified contractor or licensed installer familiar with USPS 4B+ mounting requirements and local building codes. The unit requires secure wall anchoring or a compatible pedestal mount rated for the unit weight of 60.5 pounds. Verify rough-in dimensions against the 20 x 26 x 33 inch envelope before mounting. Consult USPS Publication 632 and applicable local codes for placement height and accessibility compliance prior to final installation.