More Info About 4C Horizontal Mailboxes
Salsbury horizontal style commercial mailboxes are ideal for apartments, condominiums, office buildings, military bases and residential developments. Made entirely of aluminum, 3700 series 4C horizontal mailboxes and 3600 series 4B+ horizontal mailboxes are U.S.P.S. approved and available as front loading units or rear loading units.
Salsbury 3700 series 4C horizontal mailboxes and parcel lockers meet the specifications of USPS-STD-4C. The 4C horizontal mailboxes are required for new construction effective October 2006. The 3600 series 4B+ horizontal mailboxes have been U.S.P.S. approved to the required security upgrades of USPS-STD-4B+. 4B+ horizontal mailboxes are approved for replacement and/or retrofit installations effective October 2006.