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                        Hardware Eligibility Letters


            
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  Roadway Departure Safety
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                Archived Hardware Eligibility Letters – NCHRP 350
These letters are archived and are posted for "historical and research purposes only" per the sunset dates in the AASHTO/FHWA Joint Implementation Agreement and exceptions to these dates as posted on the AASHTO Committee on Design website.SearchHardware Type
                    
- Any -Barrier Terminals and Crash CushionsLongitudinal Barriers and Bridge RailsLuminaire SupportsSign Supports, Mailboxes, and Delineator PostsWork Zone DevicesStart DateEnd Date
    Letter
																								Date
																								TestingSort ascending
																								Manufacturer
																								Hardware Type
																								Device DescriptionSS-96
																																				July 20, 2001
																																				NCHRP 350
																																				Poly-set
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Expanding Foam Backfill MaterialSS-78A
																																				February 21, 2001
																																				NCHRP 350
																																				SMI Steel - Southern Post
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Add 3 PPF postSS-68E
																																				December 9, 1999
																																				NCHRP 350
																																				Xcessories Squared
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Modification to 10-inch, 3-boltslip baseSS-60B
																																				June 20, 1997
																																				NCHRP 350
																																				Clifford Dent
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Additional bolt designsSS-52
																																				February 8, 1995
																																				NCHRP 350
																																				Xcessories Squared
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Three-Bolt Slip Base (same as SS-24) (Letter was originally written to Allied Highway Sales, but hardware is manufactured by Xcessories Squared.)SS-39A
																																				June 24, 1994
																																				NCHRP 350
																																				Recycled Plastic Products, Inc.
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Smaller diameter tubesSS-27
																																				May 15, 1992
																																				NCHRP 350
																																				Montana D.O.T.
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Round wood post supportsSS-17
																																				January 8, 1990
																																				NCHRP 350
																																				Transpo Industries
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Type A and Type B breakaway couplings.(If installed by direct burial, then Type AUX for S-1 soil only.)
(Posts limited to 45 #/ft below the hinge.)SS-07
																																				September 1, 1988
																																				NCHRP 350
																																				
																																				Sign Supports, Mailboxes, and Delineator Posts
																																				Wisconsin Large Sign Support System - slip base w/no upper hinge, sign  attachment clips provide for release, W12x22 posts testedB-224
																																				December 23, 2011
																																				NCHRP 350
																																				Massachusetts / Texas
																																				Longitudinal Barriers and Bridge Rails
																																				TL-2 Texas T-401 Bridge Rail
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