• Group 3 - 51 1/2" height


    Make sure your 4C Mailboxes are USPS-STD-4C Compliant

    USA Building Supplies specializes in designing 4C horizontal mailbox configurations that meet your wishes and are also USPS-STD-4C sanctioned. The Postal Service in 2006 after years of deliberation with commercial mailbox industry experts released the new USPS-STD-4C regulation for wall installation mailboxes. The new postal regulation for 4C mailboxes enhanced the security of the mail receptacle, increased the minimum door compartment size, and required a parcel locker to resident ratio of one parcel locker for every ten residents. USPS-STD-4C regulation also set forth new mailbox installation requirements. 4C mailbox installers need to be aware that there must be 28” from the finish floor to the bottom resident compartment. In addition, the top row of the mailbox locks cannot surpass 67” from the finished floor. An exception to this installation standard is if your installation contains no resident compartments in the bottom row, then you have the option to install 15” from the floor. Front loading and rear loading 4C horizontal mailboxes are available however a secure room is required for a rear load installation locations. USA Building Supplies will walk you through the process of making sure your mailboxes are 4C compliant. Get in touch with USA Building Supplies USPS-STD-4C regulation consultant today!