United States Department of Transportation
i
Crash test and evaluation of locking architectural mailboxes.
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2014-09-01
[PDF-13.03 MB]
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Abstract:Some homeowners and businesses are becoming increasingly concerned about mail-identity theft.
Consequently, there is a growing demand for the use of locking mailboxes for theft deterrence and vandal
resistance. There are a number of mailbox products on the market that offer enhanced security for mail and
small parcels. They typically feature an upper hopper for incoming mail, and a lower lockable compartment
for mail retrieval.
These lockable mailboxes are significantly larger and can be 4–5 times heavier than standard
mailboxes. Therefore, TxDOT requested evaluation of their crashworthiness before permitting their use on
the state highway system.
Under this project, crash tests were performed following MASH guidelines and procedures to assess
the impact performance of lockable, secure mailboxes on both single and multiple mount configurations. A
single locking mailbox was successfully crash tested on a thin-wall steel tube support post installed in a
releasable wedge-and-socket foundation. Testing of the larger, heavier locking mailboxes on multiple-mount
support posts was unsuccessful due to windshield deformation and intrusion.
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