Sign Support, Mailboxes & Delineators

This listing contains breakaway sign supports, mailboxes, and delineators that have been issued an Eligibility Letter by FHWA. The FHWA's Federal-aid eligibility letters are provided as a service to the States and are not a requirement for roadside safety hardware to be eligible for Federal-aid reimbursement. As stated in our eligibility letters, "eligibility for reimbursement under the Federal-aid highway program does not establish approval, certification or endorsement of the device for any particular purpose or use." It is the responsibility of the agency who owns the facility to determine whether or not to use a particular hardware device and how to use it for the particular situation. See AASHTO's Roadside Design Guide and AASHTO's Manual for Assessing Safety Hardware for guidance on selecting the appropriate Test Level (TL) based on traffic using the facility.

These devices have been evaluated in accordance with the AASHTO MASH, NCHRP Report 350 or the 1985 and 1994 AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals. Note that breakaway support hardware that was determined to be eligible under either the 1985 or 1994 editions of the AASHTO specifications were determined to meet the NCHRP Report 350 testing guidelines. However, additional testing and evaluation is necessary to meet the current criteria in MASH.

For further information about sign supports, please refer to AASHTO Task Force 13 Guide for Sign Supports, an Online Guide to Sign Support Hardware.

Recently posted Eligibility Letters are marked with an asterisk (*).

Revised Tuesday, March 21, 2017

 

Code	Date	350/MASH	Manufacturer	Device Description	View PDF	Text Version
SS-182*	2/9/2017	MASH	Xcessories Squared	MASSH-400 Breakaway Slip Base System for Square Steel Tube Sign Support	(5.75 MB)
SS-180	4/15/2016	MASH	Xcessories SQUARED	MASSH-400 Sign Support	(1.41 MB)
SS-179	7/3/2013	350	Hori-Zone Concepts / Centerline Supply	Centerline Supply Triangular Slipbase Locking Sign Collar Assembly	(1.27 MB)
SS-178	2/21/2013	350	Ground Connection LLC	Ground Connection Ground Screw Foundation	(919 KB)
SS-177	2/6/2013	350	MDSolutions	Generic Perforated Square Steel Tube Sign Supports	(681 KB)
SS-175	5/4/2012	350	Xcessories Squared	Surface Mount Slip Bases SMSB10-10-G and SMSB8-10-G	(417 KB)
SS-174	11/23/2011	350	Trinity Highway Products	Breakaway Sign Support Systems of Northwest Pipe Company	(344 KB)
SS-173	8/18/2011	350	Special Lite	Generic Aluminum Support Pole	(67.2 KB)
SS-172	6/23/2011	350	Dent Breakaway Industries, Inc.	Omni-Directional Dent Connector Assembly	(281 KB)
SS-171	5/2/2011	350	New York State Department of Transportation	Aluminum Pedestrian Signal Pole	(422 KB)
SS-170	11/30/2012	350	Minnesota Department of Transportation	Minnesota Type "C" and "D" Braced Leg Sign Supports Supports	(1.05MB)
SS-167	3/3/2011	350	Safety Base Ltd.	Safety Base C10S Couplings	(84 KB)
SS-166	12/7/2010	MASH	North Texas Tollway Authority	NTTA Short Sign Support	(282 KB)
SS-165	1/21/2011	350	Designovations, Inc.	Snap'n Safe Couplers	(157 KB)
SS-164A	4/18/2016	350	POZ-LOC® Slip Base System with Torque Separation Nut Fastener	Fastener Optional Fastening System	(712 KB)
SS-164	6/18/2010	350	Northwest Pipe Company	Poz-Loc 10 inch square slip base system	(325 KB)
SS-163	4/2/2010	350	Information Display Company	IDC Speed Check Radar Speed Display Devices	(2.48 MB)
SS-162	2/2/2010		Rick Balboa	Balboa 100 Traffic Warning Device	(76 KB)
SS-161	1/26/2010		Spot Devices	IDC Speed Check Radar Speed Display Devices	(185 KB)
SS-160	9/23/2009		Oregon DOT	Douglas Fir No. 1 and Hemlock Fir Select Structural.	(272 KB)
SS-159	1/26/2009		Roadway Construction Products, Inc.	Omni-directional I-beam slip base support for wide flange beams	(692 KB)
SS-158	2/12/2008		ACS Inc.	Light Camera mounted on Pelco Pole	(988 Kb)
SS-157	12/6/2007		Addresses of Distinction	Aluminum tube, alloy 6063-T52, diameters 2.375 and 2.875 inches. References SS-28.	(213 Kb)
SS-156	12/6/2007		Designovations	SNAPnSAFE couplers for: round surface mount, u-channel surface and in-ground mount.	(1.78 Mb)
SS-155	10/2/2007		JSF Technolgies	Solar powered Beacon attached to PSST post and ‘Kleen Break’ coupling (SS-131)	(716 Kb)
SS-154	10/25/2007		Trueform	Bus stop sign support system	(1.94 Mb)
SS-153	8/17/2007		International FiberLok	Composite Fiberglass I-beam Sign support	(756 Kb)
SS-152	8/23/2007		Northwest Pipe Company	Direct bury PSST post into 30" PSST anchor (2.25" post max.)	(613 Kb)
SS-151	7/25/2007		SHUR-TITE Products	Mailbox Support	(1.66 MB)
SS-150	6/14/2007		Northwest Pipe Company	Poz-Loc 8 inch square slip base	(134 KB)
SS-149	6/14/2007		Carmanah Technologies	Beacon mounted on square tube post utilizing a Kleen Break frangible coupling.	(247 KB)
SS-148A	8/16/2011	350	Swing Safe	SwingSAFE Swing-Away Mailbox Support	(130 KB)
SS-148	5/8/2007		Minnesota DOT	Mailbox Support	(893 KB)	No Text version is available
SS-147	4/6/2007		Wright County, MN	Generic U-channel sign post attached to PSST sign support.	(271 KB)
SS-146	3/16/2007		Designovations	Snap N Safe round coupler	(340 KB)
SS-145	2/5/2007		SteelCity Partners	Fundaflex sign support	(2.25 MB)
SS-144	1/23/2007		ARC Technologies	Precast Mailbox	(880 Kb)
SS-143	11/29/2006		Carmanah Technologies	Ground mounted sign support	(650 Kb)
SS-142	2/28/2007		Dent Breakaway Industries	Omni directional slip base accommodates round and square posts for dual post supports	(447 Kb)
SS-141	8/29/2006		POCO Inc.	groundmounted Ground-Mounted Sign Support	(322 Kb)
SS-139	7/7/2006		Clifford Dent	Dent Fuse Plates	(0.99 MB)
SS-138	6/13/2006		Special Lite Products Company	Smooth Wall Aluminum Poles	(94 Kb)
SS-137	6/13/2006		Brandon Industries	Decorative Sign Supports	(131 Kb)
SS-136	3/9/2006		Designovations	Modifications to Designovation Breakaway Device, for sizes 2 1/2 inches and smaller.	(705 KB)
SS-135	5/7/2007		All Traffic Solution	Radar Speed Display on a Slip Base Support	(100 KB)
SS-134C	2/6/2013		Xcessories Squared	Xcessories Squared Redi-Torque Triangular Slip Base	(351 KB)
SS-134B	3/30/2012		Xcessories Squared	Xcessories Squared Redi-Torque Triangular Slip Base Xcessories Squared Redi-Torque Triangular Slip Base Top (10 3/8”) with galvanized keeper plate Top (10 3/8”) with galvanized keeper plate	(587 KB)
SS-134A	4/9/2007		Xcessories Squared	Addendum that modifies the slip base receiver	(143 KB)
SS-134	5/9/2006		Xcessories Squared	"Redi-Torque" Model 280 Hardware Kit	(44 KB)
SS-133	4/13/2006		City of Spokane / Texas Trans. Inst.	Upost, Steel tube, Slip Base	(349 Kb)
SS-132	2/9/2006		Sign Support Systems	Break Out Coupler	(118 Kb)
SS-131A	5/15/2012		Xcessories Squared	Keen Break Coupler	(690 KB)
SS-131	12/2/2005		Xcessories Squared	PSST Coupling	(117 Kb)
SS-130	1/6/2006		Northwest Pipe Company	PSST Slip Base	(323 Kb)
SS-128	6/14/2007		Northwest Pipe Company	Poz Loc Slipbase Casting 2709	(62.5 KB)
SS-127	2/23/2005		Ultimate Highway Products, Inc.	Slip-Mate Slip Base	(1.16 MB)
SS-126B	5/6/2014	350	Trinity Highway Products	Perforated Square Steel Tube Sign Supports	(1.44 MB)
SS-126A	11/24/2010		Northwest Pipe Company	Northwest Pipe's Performance Post	(1.47 MB)
SS-126	12/21/2004		Northwest Pipe Company	Perforated Square Steel Tubes	(87.9 KB)
SS-125	8/17/2004		Friend Innovations	Breakaway mailbox support	(66 Kb)
SS-124	4/1/2004		Ultimate Highway Products, Inc.	Slip-Mate	(41 Kb)
SS-123#	2/28/2007		Designovations	Snap N Safe coupling for square sign supports	(311 Kb)
SS-123	4/1/2004		Designovations, Inc.	Breakaway system for fiberglass square tube sign	(82 KB)
SS-122	2/12/2004		Caminoverde, Inc.	Breakaway mailbox support	(49 Kb)
SS-121	12/30/2003		Metropolitian Transportation Commission	MTC Safe ITS Callbox on ABChance augured foundation four bolt slipbase	(38 Kb)
SS-120	4/1/2004		Designovations, Inc.	Breakaway system for perforated square steel tube sign posts	(102 KB)
SS-119	2/27/2003		Northwest Pipe Company	Square Slipbase, PozLoc in weak soil, and Pozloc Mailbox	(63 KB)
SS-118	4/30/2003		HWYCOM	Universal Anchor System Triangular slip base for Small Sign Support Installation	(22 Kb)
SS-117	11/13/2003		Northwest Pipe Company. Traffic Systems	PozLoc system	(87Kb)
SS-116	11/22/2002		Valley Forge & Bolt Manufacturing Co.	Use of load indicating fasteners in slip bases	(2.48 Mb)
SS-115A	10/23/2013	350	Trinity Highway Products	U-Bracket Sign Support	(1.68 MB)
SS-115	11/13/2002		MaxiStrut	T-Top or U-Top to pipe sign support when placed on a standard triangular slip base	(81Kb)
SS-114	11/25/2002		Ssquare Tube Products	NEX Tube Mailbox Support	(1.15 Mb)
SS-113	10/17/2002		Intellistrobe Safety System	Intellistobe signal system	(596 Kb)
SS-112	4/16/2002		K&K Systems	Flashing Light Warning Apparatus	(549 Kb)
SS-109	8/16/2002		Prairie Proto Products	Swing-away Mailbox Support and Delineators	(227 Kb)
SS-108	10/22/2002		Glenncast, Inc.	Aluminum Sign Poles with Decorative Castings	(2 Mb)
SS-107	4/9/2002		Town of Waterford, CT	2 PPF U-channel sign supports	(74 Kb)
SS-106	3/13/2002		Trinity Industries	Dent Bolt Two Slip Base posts in seven foot path	(100 Kb)
SS-105	3/13/2002		Metro Sign	2 inch square aluminum post on u-channel stub	(79 Kb)
SS-103	12/14/2001		Marion Steel Company	Slip Safe for use with square steel tube posts	(25 Kb)
SS-101	12/12/2001		BMK Corporation	Polecrete Postloc foaming polyurethane backfill product	(20 Kb)
SS-99	10/23/2001		Transpo Industries, Inc.	Dual and Triple Posts on double-necked couplings	(630 kb)
SS-98	8/29/2001		Skydril	Cast coupler for u-channels	(185 kb)
SS-97	7/20/2001		Safety Base LTD	Breakaway Sign Post Couplings	(407 kb)
SS-96	7/20/2001		Poly-set	Expanding Foam Backfill Material	(126 kb)
SS-95	3/28/2001		Franklin Industries	Ribbed Back version of u-channel post	(28 kb)
SS-94	3/1/2001		Granger and Associates	Partially Threaded spacer bar for u-channel posts.	(105 kb)
SS-92	1/29/2001		Tremex	Plastic post, steel foundation delineator system	(172 kb)
SS-91	12/2/2002		Quickfix Couplers	Cast Aluminum couplers for single or dual PSST or round pipe posts	(2.66Mb)
SS-90	8/18/2000		K&K Systems, Inc.	School Warning Signs with flashing lights, battery, solar panel and Marion Slip-Safe system.	(12.5 Mb)
SS-88	8/15/2000		Poz-Loc Traffic Systems; Northwest Pipe Company	Single and Dual Slip base system for square tube supports	(4.9 Mb)
SS-87	6/6/2000		Ericsson Manufacturing	Precast Concrete Foundation for Small Sign Supports	(1.6 Mb)
SS-86	12/15/1999		Woodguard Lumber Corporation	89-mm polyethylene coated sign post	(1.3 Mb)
SS-85	7/31/2000		Unistrut Distribution Company	Poletech with PUB - Plastic Bung for Square Signs February 2000	(2.8 Mb)
SS-84	7/26/1999		Los Angeles County SAFE	Comarco Wireless Technologies TTY Call Box Support	(4.0 Mb)
SS-83	7/19/1999		Marion Steel	Modified Rib-Bak - Canadian post section	(1.4 Mb)
SS-82	6/21/1999		St. Louis Steel	Perforated square steel tube sign suppports.	(1.8 Mb)
SS-81	1/20/1999		S-Square Tube Products	NEX-TUBE 50.8-mm octagonal steel, 12 or 14 gage tubes in anchor or direct bury, strong and weak soil	(151 Kb)
SS-80	7/25/1998		Dottie Aberlie USAberlie	USAberlie Post Exchanger alum.base for 4x4 wood posts and 64-mm perf. square steel tubes in strong soil	(151 Kb)
SS-79	4/15/1998		Lewis Rhodes HwyCom Inc	76-mm OD, 3.175-mm fiberglass posts in Universal Anchor System Bolt-Down Base	(150 Kb)
SS-78A	2/21/2001		SMI Steel - Southern Post	Add 3 PPF post	(90 Kb)
SS-78	2/3/1998		SMI Steel - Southern Post	Steel Flanged Channel Sign Posts up to 3.7 kg/m	(169 Kb)
SS-77	6/28/1997		Chicago Heights Steel	"Eze-erect" type breakaway system using Gr 9 bolts.	(80 Kb)
SS-76	1/9/1998		New Hampshire DOT	Certain thin walled Aluminum pipe and steel u-channels	(89 Kb)
SS-75	4/9/1997		Universal Anchor Systems, Inc	Universal Anchor System with HWYCOM and POZLOC posts	(90 Kb)
SS-74	3/14/1997		Granger and Assoc	"ANYTWO" bracer bar for splicing u-channels	(375 Kb)
SS-73	2/24/1997		PennDot	"Universal" Spacer Bar for splicing u-channels	(85 Kb)
SS-72A	10/27/2000		TAPCO	V-Loc Sign Support	(92 Kb)
SS-72	1/13/1997		TAPCO	V-Loc Sign Support System	(868 Kb)
SS-71	12/23/1996		Davidson Plastics	Flexi - Guide Delineator Posts	(83 Kb)
SS-70	9/25/1996		Richard Buhler	Sleeve it N Go for 4x4 wood posts	(106 Kb)
SS-69A	4/4/1997		Safety Quest, Inc.	Slip Safe in Weak Soil	(259 Kb)
SS-69	9/18/1996		Safety Quest, Inc	U-Channel Slip Splice	(90 Kb)
SS-68H	12/26/2001		Xcessories Squared	Modification to 8-inch 3-bolt slip bases – Revised concrete footer for weak soil	(385 Kb)
SS-68G	12/26/2001		Xcessories Squared	Modification to 10-inch 3-bolt slip bases – Three within a 7 foot span	(727 Kb)
SS-68F	12/20/2000		Xcessories Squared	Modification to 3-bolt base	(85 Kb)
SS-68E	12/9/1999		Xcessories Squared	Modification to 10-inch, 3-boltslip base	(85 Kb)
SS-68D	2/22/1999		X-Cessories Squared	3-bolt slip base, 10-inch variety	(360 Kb)
SS-68C	10/22/1997		X-Cessories Squared	3-bolt slip base for perf. square steel posts. Accepted previously via SS-52 on 2/8/65 under different name	(84 Kb)
SS-68B	10/7/1997		X-Cessories Squared	Slip Base for Retrofit Square Steel Tube Posts	(892 Kb)
SS-68A	12/20/1996		X-Cessories Squared	Slip Base, Triple Square supports in Standard soil	(80 Kb)
SS-68	9/18/1996		X-Cessories Squared	Slip Base (8-inch) for Square Steel Tube posts **	(373 Kb)
SS-67A	3/4/2016		Franklin Industries Co.	Franklin Base Bolted Sign Support	(655 KB)
SS-67	9/9/1996		Franklin Industries	60 KSI U-Channel Posts recertification	(128 Kb)
SS-66	8/8/1996		HwyCom	Universal Anchor System for FRP & Poz Loc Posts	(218 Kb)
SS-65B	12/3/1997		Southwestern Pipe	Remove proprietary restrictions	(79 Kb)
SS-65A	6/20/1997		Southwestern Pipe	Poz-Loc slip base and Yielding Anchor System in weak soil	(95 Kb)
SS-65	9/5/1996		Southwestern Pipe	Poz-Loc Slip Base**	(392 Kb)
SS-64	7/18/1996		Marion Steel	Metric "Rib-Bak 2" Posts	(81 Kb)
SS-63	7/2/1996		S Square Tube Products	Perforated square steel tube sign supports	(184 Kb)
SS-62	6/3/1996		Western Highway Products	ULTI-MATE perforated square steel tube sign supports	(191 Kb)
SS-61	2/27/1996			Revised Oregon multi-directional slip base	(86 Kb)
SS-60B	6/20/1997		Clifford Dent	Additional bolt designs	(7.2 Mb)
SS-60A	10/21/1996		Clifford Dent	Larger bolts with same necked-down diameter	(4.4 Mb)
SS-60	10/27/1995		Clifford Dent	Coupling for sign supports	(2.6 Mb)
SS-59A	4/19/1996		Chicago Heights Steel	Modify design to use "bar spacer"	(186 Kb)
SS-59	3/7/1996		Chicago Heights Steel	Dual 3 ppf u-channel in strong soil	(169 Kb)
SS-58	9/27/1995		Flexstake	Flexible delineator posts	(150 Kb)
SS-57A	7/18/1996		Marion Steel Company	Redesigned Rib-Bak	(80 Kb)
SS-57	9/26/1995			Minuteman coupler on Triple 3ppf and 4ppf (w/soil plate on 4ppf),in all soils.	(88 Kb)
SS-56B	7/18/1996		Marion Steel Company	Redesigned Rib-Bak	(80 Kb)
SS-56A	3/14/1996		Marion Steel Company	Modify design to use "bar spacer"	(115 Kb)
SS-56	7/13/1995		Marion Steel Company	"Lap Splice" for triple 3ppf and 4ppf in both soils	(89 Kb)
SS-55	4/24/1995		Colorado Dept. of Transportation	4 x 6 Wood posts installed sideways	(80 Kb)
SS-54	3/28/1995		Chicago Heights Steel	U-channel posts to 4 PPF in "EZE-Erect" configurations	(823 Kb)
SS-53A	3/19/1996		Lancaster Composite	Direct Bury acceptance of some SS-53 posts in std soil**	(135 Kb)
SS-53	3/9/1995		Lancaster Composite	Concrete-filled fiberglass posts	(171 Kb)
SS-52A	10/22/1997		Xcessories Squared	Reference letters to Unistrut and Allied Highway Sales	(85 Kb)
SS-52	2/8/1995		Xcessories Squared	Three-Bolt Slip Base (same as SS-24) (Letter was originally written to Allied Highway Sales, but hardware is manufactured by Xcessories Squared.)	(81 Kb)
SS-51	1/23/1995		Unistrut Corp.	A570 Perforated Square Steel Posts W/60 ksi yield	(187 Kb)
SS-50	11/8/1994			Virginia's 5x5 unmodified single wood post in soil-cement foundation **	(84 Kb)
SS-49	10/26/1994		Galvacor	2 PPF U-channel A-36 steel delineator posts	(85 Kb)
SS-48A	6/22/1998		SAFE Installation Company	SAFE foundation for “Penn Dot Type A Two-Legged” highway signs	(188 Kb)
SS-48	9/23/1994		SAFE, Inc	Safe Foundation and Anchors base for breakaway couplings	(84 Kb)
SS-47	9/14/1994		South Dakota DOT	Splicing 3PPF Marion post to 4PPF Franklin Stub	(83 Kb)
SS-46A	9/21/1995			Dual Unmodified Cedar Posts full dimension 4"x6"	(84 Kb)
SS-46	6/17/1994			Single Unmodified Cedar Post full dimension 4"x6"	(84 Kb)
SS-45	5/11/1994			Drilled Wood posts in concrete foundations, Pennsylvania designs **	(91 Kb)
SS-44	3/30/1994		Unistrut Corp.	14-gage A715 Gr 60 Perf. Square Steel posts *	(86 Kb)
SS-43	1/18/1994		VSAR Systems	Speed-E-Rect breakaway device for U-channels	(135 Kb)
SS-42	11/10/1993		Marion Steel Co.	1.12 PPF and 1.33 PPF A-36 Delineator Posts	(83 Kb)
SS-41A	1/28/1998		Richard Strizki	Design revisions to New Jersey Breakaway Sign System.	(486 Kb)
SS-41	11/8/1993		Richard Strizki	Load Concentrating Coupling and Adjustable Anchor and Bracket Assembly	(230 Kb)
SS-40	10/27/1993		Unistrut Corp.	2" Square Perforated Steel Tube, One Post, Direct Bury	(80 Kb)
SS-39A	6/24/1994		Recycled Plastic Products, Inc.	Smaller diameter tubes	(77 Kb)
SS-39	10/25/1993		Recycled Plastic Prod.,Inc	3.5" x 3.5" Recycled Plastic Small Sign Support	(86 Kb)
SS-38A	10/22/1997		Xcessories Squared	Reference Xcessories Squared as the Manufacturer	(85 Kb)
SS-38	10/27/1993		Unistrut Corp.	Telespar Cast Iron Three-Bolt Slip Base	(358 Kb)
SS-37	8/13/1993		Greenline	Recycled Thermoplastic Delineator Posts	(148 Kb)
SS-36A	4/22/2014	350	Michigan DOT	Breakaway Wood Sign Supports with Lag Screws	(1.23 MB)
SS-36	9/3/1993			Large and Small Sign Supports (See memo for details on various Wood, U-Channel, Perf.Sq.Steel Tube, Slip Base, FRP posts.)	(2,408 Kb)
SS-35	5/28/1993		Imperial, Inc	Aluminum tube 2.375" diameter	(83 Kb)
SS-34	3/20/1993		Louisiana DOTD	Omni Directional Slip Base, 3.5" diameter post	(184 Kb)
SS-33	10/29/1992		Transpo Industries, Inc.	201C and 301C Pole-Safe couplings for Motorist Aid Call Box Supports	(277 Kb)
SS-32	10/28/1992			Western Red Cedar for Breakaway Wood Supports	(79 Kb)
SS-31	10/22/1992		Allied Tube and Conduit	Single Perforated Square Steel Tube 2 ½" 12 ga in 7 ga anchor	(78 Kb)
SS-30A	10/5/1992		Hapco Division	Extend range of pole heights and correct aluminum spec called for in SS-30	(80 Kb)
SS-30	9/17/1992		Hapco Division	Cast Aluminum Shoe Base for Motorist Aid Call box Supports	(249 Kb)
SS-29	7/15/1992		A.B. Chance	Helical Screw Foundations for Motorist Aid Call boxes	(335 Kb)
SS-28	5/26/1992			3 ½" Diam. Thin Walled Aluminum Tube Single Spliced (6" c-c) Marion Steel or Franklin Steel 4 ppf U-channel post	(494 Kb)
SS-27	5/15/1992		Montana D.O.T.	Round wood post supports	(84 Kb)
SS-26	2/11/1992		Unistrut Corp.	Telespar square perf. tube small sign supports without sleeve around base post.	(78 Kb)
SS-25	6/4/1991			a. Single or dual 4"x4" wood, undrilled b. Single 6"x8" wood with 3.0" holes c. Single 6"x6" wood with 2.0" holes d. Single 4"x6" wood with 1.5" holes e. Dual W6x12 steel post on slip base (up to 18 ppf for dual supports OK	(106 Kb)
SS-24A	10/22/1997		Xcessories Squared	Reference Xcessories Squared as the manufacturer.	(86 Kb)
SS-24	5/1/1991		Unistrut Corp.	Triangular Slip Bases for Square Tube Sign Supports.	(914 Kb)
SS-23	3/14/1991			New Jersey Breakaway Couplings	(145 Kb)
SS-22A	8/22/1999		Trus Joist McMillan	Reissue	(79 Kb)
SS-22	1/4/1991		Trus Joist Corporation	Type "L" MICRO=LAM with revised saw cut	(130 Kb)
SS-21	12/26/1990		Minute Man Breakaway	MMB-1HD breakaway device with two 3 #/ft flanged channel "U" posts in both strong and weak soil.	(171 Kb)
SS-20	9/20/1990		Franklin Steel	2 to 3 pound-per-foot flanged channel "U" posts.	(83 Kb)
SS-19	7/31/1990		Allied Tube and Conduit	Square-Fit signpost systems.	(82 Kb)
SS-18A	7/18/1996		Marion Steel Company	Redesigned Rib-Bak	(80 Kb)
SS-18	6/19/1990		Minute Man Breakaway	MMB-1HD breakaway device for use with two 3 #/ft flanged channel "U" posts in strong soil. (see SS-21 for weak soil acceptance letter)	(87 Kb)
SS-17C	7/10/2003		Transpo Industries, Inc.	Type A Break Safe System sign support system	(20 Kb)
SS-17B	4/25/1995		Transpo Industries	Type A breakaway coupling accepted for use with dual square steel tube supports	(79 Kb)
SS-17A	3/7/1995		Transpo Industries	Type A breakaway coupling accepted for use with single square steel tube supports.	(235 Kb)
SS-17	1/8/1990		Transpo Industries	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.)	(745 Kb)
SS-16	12/29/1989		Minute Man Breakaway	MMB-1HD breakaway device for use with 3 #/ft. steel flanged channel "U"-posts.	(318 Kb)
SS-15	12/12/1989			Single 3" and 4" diameter Aluminum, 3/16" wall, direct burial tube. **	(85 Kb)
SS-14	10/27/1989		Marion Steel	Rib-Bak Post with Minuteman Coupling **	(77 Kb)
SS-13D	7/18/1996		Marion Steel Company	Redesigned Rib-Bak	(80 Kb)
SS-13C	12/27/1991		Marion Steel	Project by project acceptance of Florida's splice in both soil types	(85 Kb)
SS-13B	12/12/1991		Marion Steel	Permit threaded spacers to lap splice design	(81 Kb)
SS-13A	10/2/1989		Marion Steel	Clarifies grade of steel to be “SP-80"	(80 Kb)
SS-13	8/31/1989		Marion Steel	Single to triple 3 ppf and single or dual 4 ppf Rib-Bak post installations with ground splice. **	(149 Kb)
SS-12	8/3/1989		HwyCom Corp.	Dual post installations of 3-inch FRP.	(465 Kb)
SS-11	5/18/1989		Allied Tube & Conduit	Quick-Punch post - Max size 2.25 x 2.25" x 14 ga. in unreinforced 12 ga. sleeve base.	(81 Kb)
SS-10	5/11/1989		HwyCom Corp.	3-Inch Diameter, 1/8 in. wall, fiber-reinforced plastic post. (see SS-12)	(462 Kb)
SS-09B	10/17/1996		Franklin Steel	Dual EZE-Erect in strong soil.	(83 Kb)
SS-09A	4/7/1989		Franklin Steel	Specify steel as ASTM A499-81, Grade 60	(79 Kb)
SS-09	3/16/1989		Franklin Steel	EZE-Erect Sign Posts - max 4.0 lb/ft flanged posts	(465 Kb)
SS-08	3/31/1989		Unistrut Corp.	TELESPAR small sign supports max size 2 ½ x 2 ½ in. x 12 ga.	(442 Kb)
SS-07	9/1/1988			Wisconsin Large Sign Support System - slip base w/no upper hinge, sign attachment clips provide for release, W12x22 posts tested	(83 Kb)
SS-06	3/10/1988		Minute Man Anchors, Inc.	Breakaway coupling for use with steel flanged channel supports. **	(497 Kb)
SS-05A	7/18/1996		Marion Steel Company	Redesigned Rib-Bak	(80 Kb)
SS-05	6/15/1987			a. Perforated square steel tube - 2 x 2 in. x 0.105 wall thick. max size.** b. Single 3 lb/ft steel U-post. ** c. Dual 3 lb/ft steel U-post. ** d. Ariz. dual legged slip base S4x7.7 post e. Texas dual leg slip base, W12x45 post f. to g. repeated SS-1 to SS-4 above	(2,465 Kb)
SS-04	1/29/1987		Minute Man Anchors, Inc.	Breakaway coupling for use with 3 lb/ft steel flanged channel post (superseded by new hardware on 3/10/88. See SS-6) **	(916 Kb)
SS-03	10/3/1986		Allied Tube & Conduit Corp.	QWIK-PUNCH tube system - max size 2 1/4 x 2 1/4 in. x 12 ga. post set in reinforced sleeve base.	(117 Kb)
SS-02	8/19/1986		Trus Joist Corp.	MICRO-LAM - 14 7/8 X 7 7/8 in. box section plywood post. Tested in S-2 soil.	(483 Kb)
SS-01A	7/14/1986		Southwestern Pipe, Inc.	Poz-Loc 2 posts	(453 Kb)
SS-01	7/14/1986		Southwestern Pipe, Inc.	POZ-LOC anchor system - 2 3/8 in. O.D. posts, max .095 in. wall thickness. **	(175 Kb)
xx02	10/17/1996		Franklin Industries	Dual EZE-Erect in Strong Soil	(83Kb)