1. Session 6 KY Type 4A End Treatment See “Shop Drawings” for Types FLEAT-SP Slide 6 by Road Systems SRT-27 Slide 49 by Trinity
The KY Type 4A End Treatment is represented by the FLEAT-SP by Road Systems and the SRT-27 by Trinity Highway Products.
The Type 4A is a flared end treatment.

2. Standard Drawing RBR-035 Guardrail End Treatment Type 4A MUST use App
Standard Drawing RBR-035 Guardrail End Treatment Type 4A MUST use App. Shop Drawings
KY’s Generic Standard Drawing for the Type 4A End Treatment– not much info – and still shows wooden post. You need Approved Shop Drawing and Manufacture’s Installation or Assembly Instructions to Install or Inspect

3. RBR-035 -KYTC Pay Limits for the Type 4A is 37'-6” even though the FLEAT Shop Drawing says 12’ 6”?
The FLEAT-SP Shop Drawing (bottom drawing) and Manufactures Assembly Instructions Show the End Terminal “End of Payment For Installation” to only be 12’ 6”. That is all the manufactures ships. However on Standard Drawing RBR-035 (currently a Sepia Drawing until Jan 2012) the KYTC Pay limit is 37’ 6” in order for the SRT and the FLEAT-SP to be equal in length for bid alternates (top Drawing). The remaining 25’ for the FLEAT-SP will be Standard Post with 8” Offset Blocks. At Post #7 the contractor will begin with the KY Standard 6” Offset Block.

4. Installation Instructions for Proprietary Guard Rail End Terminals
This Std Draw Note appears on each Proprietary End Treatment used in KY - “The Manufacturer SHALL furnish two (2) sets of shop plans to the contractor with each installation”
Each Proprietary End Treatment “see shop drawings”
Added to Sect of 2012 Std Specs: “Proprietary end treatments SHALL be installed according to the manufacturer’s assembly or installation instructions”
SHOULD NOT LET THE CONTRACTOR BEGIN INSTALLATION BEFORE SUPPLYING YOU WITH THESE SHOP PLANS & INSTALLATION INSTRUCTIONS – Both you and the contractor need these documents to properly do your jobs of installing and inspection propriety guardrail end terminals
CLICK
What dose this statement mean??
This Note has been on proprietary guardrail end treatment Standard Drawings for many years. How many of you have seen this note and required the Shop Plans or Drawings?
CLICK – this note has been added - CLICK
You should require this before allowing installation to begin. Probably all you need to do is require it once and the contractor will have the required information from that date forward CLICK

5. How do you know which version of a Proprietary Guardrail End Treatment KY is Using?
Go to the KYTC Div of Design Home Page
On the right click on Standard Drawings
Brings up:
Standard Drawings
Active Sepia List
Approved Shop Drawings - Click
The drawings show the version 350, SP, 27 etc.
Good general information on the Shop Drawing

6. Approved Shop Drawings Type 4A Click for Alternate 1 or 2

7. Approved Shop Drawing Type 4A Alternate - FLEAT-SP

8. Type 4A End Treatment FLEAT-SP (Std Post) Installation http://roadsystems.com/fleat.html
Flared Energy Absorbing Terminal – Standard Post

9. FLEAT & SKT-SP Road Systems http://roadsystems
SKT-SP & FLEAT-SP
A very easy to follow
“Assembly Instructions”
With Drawings and Photos
As I noted in the Type 1
Discussion we will cover both
the Type 1 SKT-SP and
the Type 4A FLEAT-SP
Installation together with the
Type 4A Discussion

10. FLEAT FLared Energy Absorbing Terminal Absorbs Energy by Kinking & Extruding the Rail Thru Impact Head
From The FLEAT combines the superior performance of the energy absorbing tangent terminals with the advantage of flared terminals in reducing nuisance impacts. During head-on impacts, the FLEAT head slides over the W-beam guardrail. The rail is sequentially kinked or bent as it moves through the head. The kinked guardrail exits the head safely and the vehicle is brought to a controlled stop. When impacted along the side within the length-of-need, the FLEAT functions like guardrail. The errant vehicle is safely redirected back toward its original travel path.

11. The FLEAT Extrudes the Rail Toward Traffic in a Tight Roll Thru Impact Head and Feeded Chute
Because of the dynamics of extruding the guardrail and the guardrail being flared, when attempting to both flare and extrude the rail away from traffic the rail would kink. To get the system to work, Road Systems had to extrude the rail toward traffic to keep the rail from kinking. With flaring in one direction and extruding the rail in the opposite direction Road Systems was able to develop a TL-3 Flared Energy Absorbing Terminal (FLEAT-SP). Due to the tight roll of the extruded rail, there have not been problems with the rail extruding out into traffic.

12. Type 4A FLEAT-SP http://roadsystems.com/fleat.html
FLEAT-SP (FLared Energy Absorbing Terminal – Standard Post System) is an energy-absorbing flared terminal -NCHRP 350 APPROVED
Flare is straight and the offset is variable between 2'-6" and 4'-0” - KY only uses 4’
No strut, but does have a soil plate at Post 1
POST 3-6 STD GR POST W6x9 with 8” offset blocks.

13. FLEAT Variable Offset KY = 48”
The FLEAT Variable Offset allows for an Offset of 30-48” – KY GENERALLY uses 48” if available. If offset distance is not available KY generally reverts the Type 1 End Treatment
2’-6”
4’-0”
Road Systems, Inc.

14. Type 4A FLEAT-SP http://roadsystems.com/fleat.html
FLEAT-SP Guardrail has SLOTS Toward The Impact Head
Cable Anchor Bracket has Special Bolts with Widened Shoulders

15. Type 4A FLEAT-SP 4 Foot Offset

16. Installation Procedures for FLEAT-SP and SKT-SP
Install standard steel guardrail posts #3 - #6 (on a straight 48” flair Post 7 to Post 1 FLEAT)
Install breakaway steel end posts #1 and #2
Install guardrail. All posts are spaced at 6'-3"
Install cable anchor bracket
Install the SKT-SP or FLEAT-SP impact head
Install cable assembly
Begin the installation at the downstream end of the SKT-SP or FLEAT-SP to ensure that the
terminal matches up with the standard downstream section of guardrail.

17. Install Post 3-6 Requires Standard Post at 6’3” Post Spacing.

18. Energy Absorbing End Treatmentts STRAIGHT FLARE / NOT CURVED
NO CURVES
Note: All of the W-Beam within the SKT-SP &FLEAT-SP end treatment must be straight. Curving the rail within the terminal is not permitted.
Energy Absorbing End Treatmentts
STRAIGHT FLARE / NOT CURVED

19. Post 1 and 2 are Hinged to Facilitate Bending of the Post Upon Impact Post 1 has a Soil Plate - Downstream
Steel posts #1 & #2 are hinged steel posts. These bolted posts must have the lower section installed before attaching the top section. The lower section of the bolted hinged steel posts should NOT be driven with the upper post attached.

20. Post 1 and 2 are Hinged to Facilitate Bending of the Post Upon Impact Post 1& Post 2 are NOT the Same
Post 1 and 2 are NOT the same
Post 1 and 2 are both two part Post that Bend or Hinge on Impact
Install the bottom of the Post before connecting the Top portion of each Post
Steel posts #1 & #2 are hinged steel posts. These bolted posts must have the lower section installed before attaching the top section. The lower section of the bolted hinged steel posts should NOT be driven with the upper post attached.

21. Post 1 and 2 are Hinged Post 1 has a Soil Plate - Downstream
Note how the Soil Plate is downstream of the Impact head.

22. IMPORTANT SKT-SP and FLEAT-SP Assure the 5/8” or 3/4” Hinge Bolts are at the Proper Locations
Post 1 – 5/8” x 8 ½” bolt, nut & 2 washers are on UPSTREAM side of the post (toward Impact Head)
Post 2 - ¾” x 8 ½” bolt and nut (no washers) on DOWNSTREAM side of the post (away from Impact Head)

23. IMPORTANT SKT-SP and FLEAT-SP Assure the 5/8” or 3/4” Hinge Bolts are at the Proper Locations
Post 1 – 5/8” x 8 ½” bolt, nut & 2 washers are on UPSTREAM side of the post (toward Impact Head)
Post 2 - ¾” x 8 ½” bolt and nut (no washers) on DOWNSTREAM side of the post (away from Impact Head)
Post 1 – 5/8” x 8 ½” bolt, nut & 2 washers are on UPSTREAM side of the post with (toward Impact Head)
Post 2 - ¾” x 8 ½” bolt and nut (no washers) on DOWNSTREAM side of the post (away from Impact Head)

24. Post 2 is Hinged so it will bend over upon impact, slot allows the post to release from the guardrail bolt
Traffic
Bolt upper and lower post #2 together with a ¾“ x 8 ½" hex bolt and nut. Since a ground strut is not used with the SKT-SP or FLEAT-SP, an 8" hex bolt will also work. Be sure when the lower segment of the post is installed, the hinge bolt is on the downstream side of the post (opposite the impact head). The upper post #2 has an open-ended slot for the post bolt. Be sure this slot is on the upstream side of the post (toward the impact head).

25. Post 2 -Assure the Guardrail Connection Bolt Slot is Facing Post #1 – Guardrail Connection Bolt slides out upon Impact
There are open ended slot(s) for the Guardrail Connection Bolt in the flange of the post. Be sure the upper portion of Post 2 is installed with the slot facing Post 1 so the guardrail connection bolt can slip out of the slot upon impact.

26. Post 2 is Installed Incorrectly
Post 2 is Installed Incorrectly!! Top and Bottom are Installed Backward – Post Cannot Hinge properly – GR Bolt Cannot Release Properly
Traffic
This Post 2 is installed incorrectly. According to previous slides the ¾” x 8 ½” Hinge Bolt for Post 2 shall be on DOWNSTREAM side of the post (away from Impact Head) and the Slots in the top portion of the post are to be oriented toward Post 1. As built the hinge cannot fold properly and the guardrail connecting bolt cannot release.

27. Therefore Post 1&2 do not line up with other Post
Post 3-6 require Standard Post With 8” Offset Blocks Post 1 & 2 no Offset Blocks
Therefore Post 1&2 do not line up with other Post
The FLEAT-SP and SKT-SP by Road Systems.
Because Post 1& 2 do not have Offset Blocks the Post will not line up with Post Therefore those Post are set 8” closer to the guardrail. Remember, as was shown with the Type 1, if you do not get Post 1 close enough to the rail you have problems getting the impact /extruder head on properly.

28. Install the rail from Post 6-3 with 8” Offset Blocks and Post 1-2 No Offset Blocks Do NOT Attach Guardrail to Post 1 or 3 (Type 4A FLEAT)

29. Type 1 “SKT-SP” Guardrail Bolt is Connection to Post 3 - Correct Installation
Connect the Guardrail
to Post 3 as shown
Post 3

30. Type 4A “FLEAT-SP” NO Guardrail Bolt Connection to Post 3 - Incorrect Installation
Do NOT Connect the Guardrail
to Post 3 just Connect the Block Out
Post 3

31. FLEAT-SP – Guardrail Correctly “NOT” Bolted to Post 3 – just Connect Offset Block to Post 3
Poor backfill around the post

32. Guardrail Post 1-3 has 10 slots to Facilitate Bending the Rail as it Extrudes thru the Impact Head and 8 Bolt Holes
The slots in the first section of guardrail are oriented toward the impact head.
Attach the guardrail end section to span from post 1 to 3 for a 12'-6" long rail, or from post 1 to 5 for a 25'-0" long rail. Most times a universal end panel with 6'-3" post spacing would be supplied. The universal end panel can be identified with eight (8) holes ¾" diameter to attach the cable anchor bracket and thirteen (13) slots. Ten (10) slots
½" x 4" are in the corrugations of the rail and three (3) slots ½" x 4" are in the valley of the rail.

33. Note: 2 washers on each bolt
Cable Anchor Bracket – Install Shoulder Bolts Washers, Nuts and Bracket Bolts Heads on Inside of Rail NOT Outside
Install the 8 shoulder bolts with 2 washers, one on each side of the guardrail. Be sure the shoulder bolts are placed with the shoulders of the bolts installed on the backside of the guardrail, away from traffic. Finger tighten the nut. Tap the cable anchor bracket onto the shoulder portion of the bolts using a hammer. Tighten the bolts.
Road Systems goes out of their way to correctly show the proper installation of the bolts and washers – yet we have had some problems with the bolts installed backwards and without all the washers.
Note: 2 washers on each bolt

34. Cable Anchor Bracket – Designed to Release During an Impact
Attach the cable anchor bracket shoulder bolts to the rail "finger tight". Then align the slots on the cable anchor bracket with the shoulder bolts and tap the cable anchor bracket onto the shoulder portion of the bolts using a hammer. Tighten the bolts with a wrench when the bracket is in place. The welded plate on the cable anchor bracket should be toward Post #2, as shown. Be sure the bracket is fully seated on the shoulder portion of the bolts.
Bolted to Rail
(8 places)
Bracket rest on Shoulders of Bolts
Road Systems, Inc.

35. Finger tighten Bolts & Washers – align slots on bracket with shoulder of bolts - tap into place with a hammer then tighten bolts
The bolt heads for the Cable Anchor Bracket are placed on the Inside of the Guardrail with a Washer to prevent the Widened Shoulder on the bolt from going thru the hole in the Guardrail. The Anchor Bracket rest on the Widened Shoulders of the Blots so the Cable Anchor Bracket can release during an impact. The Impact head in this example is sagging and needs to be adjusted. This is an older SKT with wooden post. Post 1 can be removed, rotated 180 degrees, drill a pilot hole and reattach the lag screw.

36. Note how the Cable Anchor Bracket rest Snugly on the Shoulders of the Special Bolts

37. Bolt head placed on Front Side of Rail Bolts installed backwards
Assure Anchor Bracket is fully seated on Shoulder Portion of the Cable Anchor Bolts - Openings on Cable Anchor Bracket toward Post 1 Bolts Installed Incorrectly – Nuts on Inside
Bolt head placed on Front Side of Rail
without Washer
These Cable Anchor Bolts are in backwards. The head of the bolt is on the front side of the rail and one washer has been left off. The bolt head should be on the back side of the guardrail with 2 washers. One washer against widened shoulder of bolt and the other with the nut on the front side of the rail. The Cable Anchor Bracket cannot release properly upon impact when installed like this.
Bolts installed backwards
with nuts on inside

38. SKT & FLEAT - Post 1 is Hinged Arm on Impact Head Helps Bend Post
Note the FLEAT-SP impact head will be installed with the rail exit slot on the traffic side. Place the impact head with the feeder guide chute over the end of the W-beam guardrail. The impact head should be positioned so that the protruding tube is on the backside of the guardrail, away from traffic. Slide the impact head forward until the post angle attachments on the impact head are aligned with the holes in post #1 (6" x 6" x ⅛" tube). Attach the impact head to the first post with two 5/16" x 1" hex bolts (each bolt gets 1 nut and (2) washers), one bolt each for the top and bottom post angle attachments.

39. For the FLEAT the guardrail is also NOT attached at Post 3.
is NOT attached
to Post 1.
The Impact Head is.
The Impact Head is connected to Post #1 with two 5/16” x 1”inch hex bolt grade 5 each with a nut and 2 washers per bolt . The guardrail is NOT bolted to post #1.
For the FLEAT the guardrail is also NOT attached at Post 3.

40. Impact Head Post 1, 5/16” Grade 5 bolts need 2 washers each (1 under nut & 1 under bolt head) and they need tightening
The 2 washers are left off ,one washer by the nut and one washer by the bolt head. The Impact Head is not tightly snugged up to the bracket on the first post.
This is not a big strong bolt. You must snug the Impact head up tight to the post and properly install the bolts and washers.

41. Improper Installation - Extruder Head not Pushed all the way on

42. SKT-SP Cable feed inside/thru the Feeder Chute FLEAT-SP cable does NOT
Unlike the Type 1 SKT The Type 4A FLEAT-SP cable does NOT feed inside or Thru the feeder chute.

43. 8”x8” Bearing Plate oriented Properly with Washer (5” up) - need restraining tie to keep Bearing Plate from Twisting
The cable gets a washer between the nut and the Bearing Plate. The hole in the 8”x8” Bearing Plate is off center with the 5 inch dimension up. Oriented correctly.
The Manufacture, “Road Systems” recommends the addition of a restraining tie (not included) to hold the bearing plate in place. This could be a plastic restraining tie.

44. Orientation of Bearing Plate Which Bearing Plate is almost Correct
Orientation of Bearing Plate Which Bearing Plate is almost Correct? Road Systems recommends a Restraining Tie
FHWA Memo Nov 3, x8” steel bearing plate – Q: MANY OF OUR GUARDRAIL TERMINALS HAVE A STEEL BEARING PLATE ON THE FIRST POST THAT SOMETIMES ROTATES UNTIL IT IS UPSIDE-DOWN. IS THIS OK? A: No. This bearing plate (8 x 8-inch square with an off-center hole) must be installed with the longer dimension upright (5" dimension up and the 3" dimension down). If the cable slackens over time traffic vibrations may allow this plate to rotate downward due to gravity. If this happens the ability of post #1 to fracture in a head-on impact (thus preventing a snag point) is severely compromised. On wood posts, a nail can be driven to prevent this rotation. A solution that works on both wood and steel breakaway posts is to specify that this steel plate be fabricated with tabs on either side that will wrap around the side of the post an inch or so to prevent rotation. This is an acceptable modification to all crashworthy terminals that use this 8 x 8-inch bearing plate. Of course, it is still critical to install the bearing plate with the 5" dimension up and the 3" dimension down. (The function of the bearing plate is to transfer load from the cable to the end anchorage.)

45. Tighten Anchor
Cable – Using
Vice Grips, on Shank not on the Cable, to prevent twisting of the Cable

46. FLEAT-SP Checklist Rail height is 27 ¾” Minimum
No Curved Rail SKT-SP 50’ FLEAT-SP 37’ 6”
Guardrail is NOT attached at Post 1 & 3
End Rail Panel has Special Slots
Hinge Post 2 is Downstream
Hinge Post 1 is Upstream
Bolt Slots in Post 2 Face Upstream

47. FLEAT-SP Checklist Continued
Stubs of Post 1&2 do not stick up 4”
Straight 4’ Flare
Bolts Holding Impact Head are Properly Installed and Secure (2 washers each)
8”x8” bearing Plate Oriented with 5” up
Cable Anchor Brackets Properly Installed Such that Bracket is Fully Seated on the Bolt Shoulders
Cable Taught

48. Road Systems Assembly Instructions for SKT-SP and FLEAT-SP
This is a very useful and well done document

49. Type 4A Alternate SRT-27
For over 2 years KY has suppose to have been installing the Trinity SRT-27 by Trinity however we have been installing the SRT-350 HBA 6 Post System. On March 7 & 8 a team from KYTC and Trinity toured KY to assure we have been installing an NCHRP-350 Approved Device and checking the installations to determine if they were installed correctly.

50. Type 4A – SRT-27 Trinity Highway products http://www. highwayguardrail

51. One of the first KY Field Installations of the SRT-27 Length of Need???
This is on KY 15, 5 mile South of Jackson and was one of the first Field Installations of the SRT-27 – Installed properly except for slack in the cable.
What about the length of need – could/should have been a longer. Shielded the large hazard – drop off to river – but failed to shield the smaller but closer hazard.

52. Type 4A Installation Manual
For the SRT-27 this is on line at:
which has a link to the SRT-27 Installation Instructions & Shop Drawings in the right hand column near the bottom
Shop Drawing on KYTC Design Web Page

53. SRT-27 Installation Instructions

54. SRT-27 Slotted Rail Terminal – 27 Inch
Need PHOTOS OF Crashed SRT-27

55. Shop Drawing SRT-27

56. SRT-27 Title Block and Parts List
SRT-27 ERECTION
DETAILS( 3 PANELS and
CR and SYT POST)

57. Gating Flared End Terminal Straight Flare Pay Limits 37’ 6”
SRT-27: Slotted Rail Terminal – 27 Inch
Gating Flared End Terminal
Straight Flare
Pay Limits 37’ 6”
The SRT-27 is not an Energy Absorbing End Treatment
The Slotted Rail Terminal (SRT-27) is a gating, flared end terminal. The straight-line flare offers a simple layout on new installations.

58. Slide of schematic from installations instructions SRT-27

59. I Installation Procedures for Type 4A – SRT-27
Post 1 – CR (Controlled Release)Post
Strut Between Post 1&2
Post 2-6 SYTP Post (Steel Yielding Terminal Post)
Post 3-6 have 8” Offset Blocks
Guardrail is not connected at Post 2, 3, 4 or 5
Standard Guardrail Post 7
37’ 6” long on a straight flare

60. SRT-27 Post Installation
Post 9 to establish the Guardrail Tangent T7 – extend to T1
Measure from T1 an offset of 4’0” perpendicular to roadway – Estb. backside of guardrail for Post 1
Measure offsets of Post 7-8
Estb. Straight line between Point 1 & Point 7 (represents back side of rail)

61. SRT-27 Post Installation Begin @ Post 9 to establish the Guardrail Tangent Line @ T7 – extend to T1
Note that there is an offset from the tangent line at Post 7 & 8 before you go on the straight flare from Post 7 to the 4 foot or 48 inch at Post 1.

62. SRT-27 Post Installation Continued
Establish Points 6’3” intervals
Installing the SYT (Steel Yielding Terminal) Post 2-6
The Center of the Yielding Holes in the Post is Finished Grade
Careful – do not mix SYT and SP (Standard Post) in the Type 4A Guardrail End Treatment – except for 4 ground line – very similar

63. Drive SYT Post at Post 2-6. Careful SYT Post and SP (Std Post) look very similar – DO NOT INTERMIX
SYT Post have
4 holes near
Ground Line
DO NOT
INTERMIX
SYT Post and
SP Post
For example: I have seen Post 2, 3, 5, 7 & 8 as SYT Post and Post 4 & 6 as SP Post and found the other 2 SYT post at Post 11 and 13.
This is improper and the device will not work properly when constructed in this manner.

64. Center of the Yielding Holes in the Post is Approx. @ Finished Grade

65. SRT - 27 Post 1 CR (Controlled Release) Post Installation
CR Bottom Post Installation
Orient lower portion of CR Post so the ¾” Strut Attachment Hole is closer to the nose of the system
Place where the Strut Hole is Finished Grade
See Manufactures Instructions if Rock is Encountered

66. Orient lower portion of CR Post so the ¾” Strut Attachment Hole is closer to the nose of the system

67. SRT-27 Post 1 CR Post Installation
CR Top Post Installation
Align the ears of the top and bottom – top plate goes in front of the bottom (shop drawing)
Insert a 5/16” x 1 ¾” Hex head Bolt in each of the 3/8” holes in bottom and top post plates – use a 5/16” washer under the hex nut
Tighten the nut (no torque requirements)

68. Post 1 CR Top Portion Installation Align the ears of the top and bottom
Slight Angle
Front View
Back View

69. Insert a 5/16” x 1 ¾” Hex head Bolt in each of the 3/8” holes in bottom and top post plates – use a 5/16” washer under the hex nut
5/16” Hex Bolt Washer & Nut each side

70. 5/16” Hex Bolt Washer & Nut each side
Insert a 5/16” x 1 ¾” Hex head Bolt in each of the 3/8” holes in bottom and top post plates – use a 5/16” washer under the hex nut
5/16” Hex Bolt Washer & Nut each side

71. Post 1 Incorrect Align the ears of the top and bottom – top plate goes in front of the bottom (shop drawing). Cable Anchor Bracket flush
Contractor drove the bottom of Post 1 backwards. When realize mistake instead of pulling bottom and re-driving properly.
Now contractor must come back to job and correct their error. Cost lots extra $$$ to come back instead of correcting when an error is found.
Bottom Post 1 driven backwards.
Bottom Post 1 only has 1 hole and it is to be toward front.
Cable Anchor Bracket NOT Flush & Gap Between Top
Bottom Ears & does not Align properly.

72. SRT-27 – Installing the Strut between Post 1 & 2
Part of the Angle Strut is below grade – installer must provide a shallow valley
Place the Angle Strut outside the Post Ear of Post 1 and backside of the SYT Post 2
Place a 5/8” x 1 ¾” High Strength Hex Bolt thru ¾” hole in Post Plate and thru Slot in Post 1 – place 5/8” Washer Under Bolt Head and Hex Nut
A claw hammer can be used to cut a trench for the strut.

73. SRT-27 – Installing the Strut at Post 1
Strut in
Shallow Valley

74. Loose Fit Without Washer
Place a 5/8” x 1 ¾” High Strength Hex Bolt thru ¾” hole in Post Plate and thru Slot in Post 1 – place 5/8” Washer Under Bolt Head and Hex Nut
Washers are Important
Incorrect
Loose Fit Without Washer
Correct
Tight Fit With Washer

75. SRT-27 – Installing the Strut Post 2
Post 2 Insert 7/16” x 1 ¾” High Strength Hex Bolt with 7/16” washer thru each of the ½”ground holes of the SYT Post and thru the slots of the Strut – place 7/16 Lock Washer and Nut on end of bolt
Tighten all Bolts – no Torque Requirements

76. SRT-27 – Installing the Strut Post 2
Washers are
Important
Incorrect
Loose Fit Without Washer
Correct
Tight Fit With Washer

77. SRT-27 Installing Rail Panels
The Guardrail from Post 7 to Post 5 does NOT have Slots
Layout the Guardrail so Slot Guard Attachment the ends of the Slots (away from Post 1)
Position Guardrail with Long Slots between Post 1&2 Post 2&3
Position Guardrail with Short Slots between Post 3&4 and Post 4&5
Splice and Post Bolt the 12’ 6”rail panel at Post 7 to the run of rail

78. SRT-27 Installing Rail Panels Continued
No Slots
Short Slots
Long Slots
Connect to
Standard Rail
@ Post 7
Slot Guards Away From Post 1

79. Long Slots Between Post 2 & 3 and 1 & 2

80. Short Slots Between Post 4 & 5 and 3 & 4

81. No Slots Between Post 6 & 7 and 5 & 6

82. SRT-27 Installing Rail Panels Continued
Insert and tighten 5/8”x10” Post Bolt thru 8” Offset Blocks and attach 5/8” Hex Head HGR Nut at Post 5, 4, and 3 (rail Panels are NOT attached to Post 2, 3, 4, & 5)
Post 2 Insert and tighten 5/8”x2” HGR Post Bolts thru 2 holes in Flange Protector (6” Backup Plate) and the Post Shelf Angle with a 5/8’ HGR Hex Nuts

83. No BOLT to Rail Connection @ Post 2, 3, 4, & 5

84. No BOLT to Rail Connection @ Post 2, 3, 4, & 5

85. Rail is Post 6
Post 6

86. Flange Protector & Shelf Angle Post 2 two 5/8” HGR Bolts & Nuts
Flange Protector is a modified Backup Plate (2 holes). Post 2 Insert and tighten 5/8”x2” HGR Post Bolts thru 2 holes in Flange Protector and the Post Shelf Angle with a 5/8’ HGR Hex Nuts

87. Flange Protector & Shelf Angle Post 2

88. SRT-27 Installing Rail Panels Continued
Splice the Rail Panel to the second Rail Panel at Post 5 with Splice Bolts and Nuts
Insert 5/8”x10” HGR Post Bolt thru the Rail Panel and Offset Block at Post 6 and secure with Hex Nut and Tighten
Splice the Rail Panel to the first Rail Panel at Post 3 with Splice Bolts and Nuts
Rail Panel DOES get attached at Post 6.

89. Rail Panel does get Bolted to Post @ Post 6

90. SRT-27 Installing Rail Panels Continued
Insert 5/8”x2” HGR Post Bolt thru the Rail Panel at Post 1 and secure with Hex Nut and Tighten – Trinity has informed me that the bolt at Post 1 should be placed on the downstream side of the post (toward Post 2) – this is in response to reports of loose cables.
Your Rail Panels are now attached

91. SRT-27 Installing Slot Guards on Downstream End of Slots
Place 4 Slot Guards against backside of the Guardrail Panels with Deflector Angle Gap Opening toward the Elongated Slots and connect with six 5/8”x1 1/4” Splice Bolts and Nuts – bolts inserted from
front of rail
Traffic

92. SRT-27 Installing Slot Guards
TRAFFIC

93. 2nd Rail Panel Installed Backwards Thus Slot Guards on Incorrect End of Slots
Traffic

94. SRT-27 Installing Cable Anchor Assembly
Place 5/8” Washer on each of the eight 5/8” Hex Head Bolts
Insert the Bolts thru the Traffic Side of the Rail Panel and the Cable Anchor Bracket (on the backside of the Rail Panel) & Secure with Hex HGR Nuts

95. Front and Back of Cable Anchor Assembly Bolts & Washers (front) and Nuts (Back)
Back of Rail Traffic
Front of Rail
Traffic

96. SRT-27 Installing Cable Anchor Assembly Continued
Slide one end of Cable into Cable Anchor Bracket
Place 1” washer and Hex Nut on End of the Cable extending thru the Cable Anchor Bracket

97. SRT-27 Installing Cable Anchor Assembly @ Post 1
Slide the other end of Cable thru the Hole Between the Top and Bottom CR Post 1
At Post 1 Place the Cable Anchor Bracket on the Cable
Place the Short Bent Leg of the Cable Anchor Bracket over the Top Edge of the Post Plate
Secure with a 1” Washer and Hex Nut

98. SRT-27 Installing Cable Anchor Assembly @ Post 1

99. View of Cable Anchor Assembly in Front of Post 1

100. View of Cable Anchor Assembly from Top Post 1

101. View of Cable Anchor Assembly From Behind Post 1

102. SRT-27 Installing Cable Anchor Assembly Continued
Restrain the cable with a Vice Grip at the End being Tightened to avoid Twisting the Cable
Tighten until Taught
Cable Anchor Assembly is now complete

103. SRT-27 Installing End Section
Connect the End Section to the End of the Guardrail with four 5/8”x1 ¼” HGR Splice Bolts and Hex HGR Nuts
Install High Intensity Reflective Sheeting

104. SRT-27 Installing End Section

105. SRT-27 Installation Checklist
Rail Height 27 ¾” Minimum
Site grading such that Ears on bottom of CR Post 1 do not exceed 4” above ground
Anchor Cable Taught
Guardrail is NOT Post 2, 3, 4 & 5
Slot Guards in place and Deflector Angle Gap Opening oriented toward Elongated Slots

106. SRT-27 Installation Checklist Continued
Guardrail panels Oriented correctly and Lapped in direction of Traffic
Backfill around Post if necessary and properly compacted
SYT Post 2-6 Center of Yielding Holes are approx. at the Finished Grade

107. Completed Trinity SRT-27 Assembly @ Roadway Products – Mid-Park Clarkson KY

108. SRT-27 and FLEAT-SP Installation manuals
SKT-SP & FLEAT-SP

109. Manufactures Installation Info
FLEAT-SP Road Systems
SRT-27 Trinity Highway Products which has a link to the SRT-27 Installation Instructions lower right column
Note: SRT-27 Shop Drawing only available on KYTC Design web page - Standard Drawings

110. 1. Q & A Time Post 2 FLEAT OK?? Post 2 Installed Backwards
Cannot hinge
or release
from rail
This Post 2 is installed incorrectly and not backfilled properly. According to previous slides the ¾” x 8 ½” Hinge Bolt for Post 2 shall be on DOWNSTREAM side of the post (away from Impact Head) and the Slots in the top portion of the post are to be oriented toward Post 1. As built the hinge cannot fold properly and the guardrail connecting bolt cannot release. The 2 errors will prevent the post from releasing from the rail and bending at the hinge during upon impact. Could lead to serious injury.

111. 2. Q & A Time What is Incorrect here??
Cable extremely loose
The cable gets a washer between the nut and the Bearing Plate. The hole in the 8”x8” Bearing Plate is off center with the 5 inch dimension up. NOT Oriented correctly. The Cable is NOT Tightened Properly. The Manufacture, “Road Systems” recommends the addition of a retaining tie (not included) to hold the bearing plate in place. This could be a plastic retainer tie.
Bearing Plate Rotated
5” to be up

112. 3. Q & A Time FLEAT-SP Third Post
Post 3 of FLEAT
Is NOT Attached
Offset Block is Attached
Please note that the SKT does get a bolt at the Post #3 the FLEAT does not.

113. 4. Q & A Time FLEAT-SP Cable Anchor Bracket
Back of Rail
Front
of Rail
The Cable Anchor Bracket Bolts were placed with the Shoulder on the Front Side of the Guardrail. The Shoulder MUST be on the Backside and the 1-1/16” OD x 9/16” ID washers must be placed so the shoulder of the Bolt will not slip thru the hold on the guardrail. With the bolts backwards, the nuts are so tight that the Cable Anchor Bracket will NOT Release Properly Upon Impact.
Bolts Installed Backwards

114. 5. Q & A Time Post 1 FLEAT-SP Anything Missing??
Washers Missing
Under Nut & Bolt
Head on Top Bolts
The top washers outside and inside Post 1 are missing.
The Impact Head of the FLEAT-SP or SRT-SP is very heavy and the washers are needed on these very small Grade 5 Bolts.

115. 6. Q & A Time SKT-27
The SKT-27 - is Unique because the Guardrail is NOT Post??? Guardrail is NOT Post 2, 3, 4 & 5