Centennial Model Mailbox on Type 2 Foundation

Report Number(s): TRNo. 0-6946-R3

Description: This system consisted of a single extra-large mailbox attached to a galvanized thin-wall steel tube support secured inside a 12-gauge galvanized anchor socket embedded in a concrete footing. The bottom (floor) of the mailbox was mounted 42 inches above grade. The Centennial extra-large mailbox (Model #950020B) from Architectural Mailboxes had approximate dimensions of 11.9 inches tall by 14.2 inches wide by 18.3 inches deep and weighed 11.8 lb. Attachment of the mailbox to the post was accomplished using a mailbox bracket with an integral collar (DHT #161443). The bracket was secured to the bottom of the mailbox using four 5/16-inch-diameter by 1-inch-long SAE Grade 5 hex bolts, two 2-inch by 5½-inch by ⅛-inch ASTM A36 plate washers, and associated hardware. The collar on the mailbox bracket was positioned over and secured to the top of the support post using a 5/16-inchdiameter by 3-inch-long SAE Grade 5 hex bolt with associated hardware. The support post was a 2⅜-inch-outside-diameter by 0.095-inch-thick galvanized thinwall steel tube (DHT #143426). The support post was inserted approximately 8 inches into a 2⅜-inch-outside-diameter by 0.095-inch-thick galvanized thin-wall steel tube socket (DHT #143434) and secured with a curved steel wedge plate (DHT #143433) on the impact side. The socket was embedded 27 inches deep and installed flush with the top of a TxDOT Type 2 nonreinforced concrete footer that measured approximately 12 inches in diameter by 30 inches deep.

Test Level: 3

MASH Test Number: 3-61

Proprietary/Non-proprietary: Non-proprietary

Pass/Fail: Pass

Evaluation: Full-Scale Crash Testing

Sponsor: TxDOT