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The U.S. Postal System requires the bottom of the mailbox to be between 40 to 46-inches above
the road surface (42-inches is generally preferred). If required, adjust the height of the vertical
arm by removing the hex bolt and nut and moving the post up or down as needed to achieve the
desired 42 to 44-inch height from the roadbed surface. Slide the hex bolt into the desired hole
and add a second hex bolt. Tighten securely with a wrench.
3. INSTALL MAILBOX MOUNTING BRACKETS. Align the middle hole on the mailbox
mounting brackets with the holes at the end of the mailbox mounting arm. Use a Philip head
bolt to attach the brackets to the arm and tighten with the bolt underneath the arm. Securely
tighten the bolts using a wrench.
