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FHWA Home / Safety / Roadway Departure / Sign Support, Mailboxes & Delineators

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.

  • Select "MASH" for crashworthy systems per the AASHTO Manual for Assessing Safety Hardware
  • Select "350" for crashworthy systems per NCHRP Report 350
  • Select "All" for both "MASH" and "350".

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

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