barrier descriptions and info - florida dot
DESCRIPTION
Good information on use and installation of concrete barriers, water filled barrier, and crash cushions.TRANSCRIPT
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BARRIERS ANDCRASH CUSHIONS
FDOT Contacts:
ConstructionStefanie [email protected]
DesignCheryl [email protected]
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2 TEMPORARY BARRIERS
Precast Concrete Temporary Barrier
Temporary Guardrail
Temporary Water Filled Barriers
Temporary Low Profile Barrier
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3 PRECAST CONCRETE
Temporary Barriers
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4 INDEX 415 BARRIER WALL
Temporary Barriers
Temporary Barriers
Index 415 units constructed prior to October 1, 2002 may be used until September 30, 2012
THROUGH JUNE 30, 2012 LETTING with usage of ‘FDOT Snake Pin’ Interconnection
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5 INDEX 415 - JJ HOOK
Temporary Barriers
Temporary Barriers
Temporary Barriers
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6 INDEX 415 AND JJ HOOK
• Free Standing
• Rigid Pavement (Concrete)• Flexible Pavement (Asphalt)• Cross Slope of 1 to 10 or flatter
• Required Between Other Types of Barriers
• Varies on Use, Location and Speed
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7 INDEX 415 AND JJ HOOK
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Free Standing Precast Concrete Temporary Barrier Wall Deflection Space Requirements
Traffic Side
When Shielding Design Speed Space
Above Ground Hazards 45 mph or Less 2’
50 mph and Greater 4’
Deflection
Dropoff Hazards45 mph or Less 2’
50 mph and Greater:2’
b. All droppoff conditions other than ‘a.’a. Dropoff 4’ or less, no traffic below
4’
Deflection Space Based On Installation On An Asphalt Or Concrete Surface.
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Used As Design Speed Offset to Travelway
Median Barrier Separating Opposing Traffic Lanes
45 mph or Less
50 mph and Greater 2’
0 min., 2’ preferred
Traffic Side Traffic Side
Free Standing Precast Concrete Temporary Barrier Wall Deflection Space Requirements
Offsets Based On Installation On An Asphalt Or Concrete Surface.
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10 INDEX 414 – TYPE K
Temporary Barriers
Temporary Barriers
Temporary Barriers
Only Type K barrier is approved for use on bridges
12’-6” Segment Length
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11 TYPE K
• Bolted• Staked • Free Standing• Backfilled
Installation
• Rigid Pavement (Concrete)• Flexible Pavement (Asphalt)• Cross Slope of 1 to 10 or flatter
Surface
• Required Between Type K Freestanding, Bolted, Staked and Back Filled
• Required Between Other Types of BarriersTransitions
• Varies on Type of Installation (above), Use, Location and Speed
DeflectionDistance
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12 TYPE K
Deflection Distance
• See Index 414 - Sheet 5Bolted
• See Index 414 - Sheet 6Staked
• See Index 414 -Sheet 6 & 7Free
Standing
• See Index 414 - Sheet 7Back Filled
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TYPE K
• See Index 414 - Sheet 5Bolted
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TYPE K
• See Index 414 - Sheet 6Staked
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TYPE K
• See Index 414 -Sheet 6 Free StandingRoadway
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TYPE K
• See Index 414 -Sheet 6Free StandingBridge
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TYPE K
• See Index 414 -Sheet 7Free StandingRoadway Median
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TYPE K
• Required Between Type K Freestanding, Bolted, Staked and Back Filled
• Required Between Other Types of BarriersTransitions
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BARRIER WALL PLACEMENT
Temporary Barriers
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BARRIER TERMS
Work Area
Approach End – The portion of a barrier system exposed to approaching traffic.
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BARRIER TERMS
Work Area
Trailing End – Downstream end of a barrier system, not exposed to approaching Traffic.
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BARRIER TERMS
Work Area
Unidirectional – Exposed to traffic approaching from one direction only.
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BARRIER TERMS
Work Area
Bidirectional – Exposed to traffic approaching from opposing directions
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BARRIER TERMS
Work Area
Point of Departure - A point on the edge of a lane at which an errant vehicle leaving the lane will likely impact
the leading face of a hazard or area of concern.
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BARRIER TERMS
Work Area
Departure Line - A line extending from the Point of Departure to the back of a hazard or Clear Zone
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BARRIER TERMS
Work Area
Departure Rate - The rate at which the Departure Line leaves the roadway and extends to the back of a hazard or CZ.
1:16 for speeds 45 mph or less1:13 for speeds 50 mph or greater
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BARRIER TERMS
Work Area
Work Area INSIDE Clear Zone Limit use theBack of Hazard or Back of Work Area Inside Clear Zone
Clear Zone Limit
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BARRIER TERMS
Work Area extends OUTSIDE Clear Zone Limituse the Clear Zone Limit Distance
Work Area
Clear Zone LimitWork Area
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BARRIER TERMS
Work Area
Beginning Length of Need- The point at which a barrier intersects the Departure Line establishes the Beginning of
the Length of Need
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BARRIER TERMS
Work Area
Length of Advancement (X) – The distance a longitudinal barrier must be extended in advance of an area of concern in order to adequately shield the hazard.
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D
d
X
Example for 45 mph with CZ of 18’ withBarrier set at 2’ from Edge of Pavement
X = 16 (18-2)X = 256’
BARRIER TERMS(LENGTH OF ADVANCEMENT)
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BARRIER TERMS
Work Area
Length Of Need Unidirectional – Barrier needed is from the approach departure line to the trailing departure line.
Length of Barrier Wall Needed
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BARRIER TERMS
Work Area
Length Of Need Bidirectional – Barrier needed is from the approach departure line to the trailing departure line
Length of Barrier Wall Needed
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34 LOW PROFILE BARRIER
Intended for use in Urban Areas where sight distance for side streets and driveways may be a problem.
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35 LOW PROFILE BARRIER
• Design Speeds of 45 mph or lessApplication
• Cross Slope of 1 to 10 or flatterSurface
• Along the run of barrier:• Tubular Markers• 50’ cc Tangent; 25’ cc radii
• Approach end:• Type 1 Object Marker
Supplemental Devices
• Deflection Distance - 9 inch min• Approach End Offset – 6 foot min
DeflectionDistance &
Offset
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36 LOW PROFILE BARRIER
• Deflection Distance - 9 inch min• Approach End Offset – 6 foot min
DeflectionDistance &
Offset
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3 Systems: Triton
Guardian
Yodock
37 WATER FILLED BARRIERS
See QPL
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38 TRUCK/TRAILER MOUNTEDATTENUATORS (TMA’S)
Truck or Trailer Mounted
Listed on QPL
Indexes
607 & 619
Mounted by Manufacturers
Recommendations
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InertialRedirective
39 CRASH CUSHIONS
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40 INERTIAL CRASH CUSHIONS
Approved for Use
30 days or less
Called for in the
Plans
Shield Barrier
Wall end
Allowed when ALL the following conditions are met:
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41 REDIRECTIVE CRASH CUSHIONS
Barrier Wall End Anchor Plates
Redirective crash cushions are the principledevice to shield approach ends of barrier wall
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42 REDIRECTIVE CRASH CUSHIONS
Barrier Wall End Anchor Plates
Where barrier wall end units are not
anchored, 2 and ½ wall units (min.) are required beyond the
length of barrier need for wall end anchorage
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LENGTH OF NEED POINT – TAU-II
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LENGTH OF NEED POINT – QUADGUARD
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LENGTH OF NEED POINT – TRACC
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LENGTH OF NEED POINT – SCI
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PAY ITEMS
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SPECIFICATIONS
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QUESTIONS ????????????????
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UNIVERSAL TAU-IIFDOT QPL S544-0029
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TAU-II
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TAU-II
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FOUNDATION OPTIONS
Chart is in QPL 544-0029 Vendor Drawings
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FOUNDATION OPTIONS
This is not an acceptable pad – asphalt placed over compacted dirt.
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CONCRETE FOUNDATIONS
8” threaded rod w/ 6” embedment
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ASPHALT FOUNDATIONS
18” threaded rod w/ 16” embedment
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ANCHOR EMBEDMENT
-Chemical or mechanical anchors are acceptable. -Most common method is using all-thread rod & epoxy.- For a concrete pad, ¾” x 8” threaded rod is used with an embedment depth of 6” in the pad- For asphalt foundations, a ¾” x 18” threaded rod is used with an embedment depth of 16” in the asphalt. -For any anchors in the concrete barrier wall, ¾” mechanical anchors (wedge bolts) are acceptable. -Proper anchor installation procedures are key – dust is blown out of holes; generous amount of epoxy put into holes; epoxy given ample time to cure before tightening, etc.-Not all adhesives listed under QPL 937 HV Type are acceptable. Manufacturer publishes periodic list of those evaluated and found acceptable per manufacturer’s requirements.
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ANCHOR EMBEDMENT DEPTH
Threads should not extend more than ¼” above the top of the nut when the nut is tight against the backstop ground plate.
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ANCHOR EMBEDMENT DEPTH
Nuts are not torqued down. No evidence of epoxy flooding out around bolt holes which could indicate not enough epoxy in holes.
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ANCHOR EMBEDMENT DEPTH
Properly installed front cable anchor plate. Note some epoxy flowing out of holes. No more than ¼” of threads extending above nuts.
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CARTRIDGE PLACEMENT
Chart is in QPL 544-0029 Vendor Drawings
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CARTRIDGE PLACEMENT
Type A Cartridge –holes towards the front
Type B Cartridge
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CARTRIDGE PLACEMENT
The writing on the cartridge should face up and is to be legible when standing behind the crash cushion looking towards the nose.
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CARTRIDGE PLACEMENT
The TAU Configuration chart is printed on the bottom side of each cartridge
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SLIDER PANELS & END PANELS
End Panel Slider Panel
The forward panel overlaps the rearward panel so the forward panel slides over and back .
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SLIDER PANELS & END PANELS
The rearward panel is “on top” of the forward panel. When impacted, the attenuator will telescope rearward.
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SLIDER PANELS & END PANELS
The gap between the slider panels should not exceed 3/4”
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SLIDER PANELS & END PANELS
If you can get your finger in the gap, it’s more than 3/4”!
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SLIDER PANELS & END PANELS
The end panel is needed even in uni-directional situations to adequately protect the backstop.
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BI-DIRECTIONAL CONDITIONS
If traffic is approaching the TAU from the backside, a bi-directional transition wing is used to mitigate a reverse impact into the backstop.
A “kit” is available for this wing (pictured) or a piece of thrie-beam guardrail and end shoe can be used.
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BI-DIRECTIONAL CONDITIONS
Drawing is in QPL 544-0029 Vendor Drawings
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BARRIER WALL ANCHORING
The TAU-II uses two barrier wall anchor tabs – one on each side of the barrier. Whenever the PCB backstop is used on an asphalt foundation, even if not in a bi-directional configuration, the anchor tabs should be used.
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TORQUE
Slider bolts: 20 ft-lbs
If the slider bolts are too tight, the system will not telescope rearward when impacted!
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TORQUE
Anchors in pad & barrier:On concrete pads – 120 ft-lbsOn asphalt pads – 5 ft-lbs
Cables:On concrete pads – 500 ft-lbsOn asphalt pads – 120 ft-lbs
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CHECKLISTS
Available for download: www.cloverleafcorp.com Click on “Download Library”
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CHECKLISTS
Available for download: www.cloverleafcorp.com Click on “Download Library”
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CONTACT INFORMATION
CLOVERLEAF CORPORATION
PO Box 7628Sun City, FL 33586Phone (813) 649-1336FAX (813) 645-5577www.cloverleafcorp.com
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QuadGuard
Tony Scheidt – Energy Absorption Systems, Inc.
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79 Installation and Maintenance tips
Monorail
Tension Strut Backup
Nose
Cartridges
Fender Panels
Diaphragms
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Mix and pour the 2-part epoxy
Torque anchors to 120 ft/lbs
80 Installation and Maintenance tips
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Fender Panel Gap should be ¾” or less.
These are good
81 Installation and Maintenance tips
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Well Nested Panels
82 Installation and Maintenance tips
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Type I Cartridges are placed in the Front of the System
Type II are in the Rear of the System
83 Installation and Maintenance tips
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Cartridges should be level
84 Installation and Maintenance tips
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Mushroom Washer should nest flat
85 Installation and Maintenance tips
BAD
GOOD
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Debris around monorail should be limited
86 Installation and Maintenance tips
BAD
GOOD
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ClearZones are still important with Redirective, Non-Gating Systems
87 Installation and Maintenance tips
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SCI SMART CUSHION®
Manufactured by:Work Area Protection CorporationSt. Charles, Illinois
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SCI SMART CUSHION®
SCI SMART CUSHION®NCHRP 350 Approved
Test Level 2 13’6” L X 24” W X 34” HTest Level 3 21”6” L X 24” W X 34” H
Fully RedirectiveNon-gatingBi-directionalAvailable for wide applicationLow Cost Repair30 Minute Reset (typical)
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Inspection for Proper InstallationPad must be per specifications as found in the manufacturer’s Design and Installation Manual.
SCI SMART CUSHION®
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Inspection for Proper Installation (continued)
The SCI SMART CUSHION® is shipped in one piece, fully assembled. During installation the unit only needs to be properly positioned on the pad. Once the SCI SMART CUSHION® is positioned, the holes in the base are used as a template to drill holes to accept the epoxy anchors.
SCI SMART CUSHION®
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SCI SMART CUSHION®Inspection for Proper Installation (continued)
Unit should be centered on the barrier
Attenuator should be level and properly oriented on pad
CL
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Inspection for Proper Installation (continued)
Check to make sure all anchors are in place and nuts are tight
SCI SMART CUSHION®
Proper torque is 125 ft-lbs.
On a full collapse, the last set of side panels will telescope 30” beyond the last terminal brace at the rear of the crash cushion. All objects that may interfere with this motion can affect the performance of and cause undue damage to the crash cushion.
The manufacturer recommends RedHead A7 Fast Dispensing, Fast Curing Acrylic Adhesive epoxy or equivalent.Proper care should be taken to make sure epoxy is within date code.
30 inchclear zone
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Inspection for Proper Installation (continued)
Check that the front section is pulled out to within 1” of the front stop bolt.
Verify that shear bolts are installed on the mobile sheaves
SCI SMART CUSHION®
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SCI SMART CUSHION®Inspection for Proper Installation (continued)
The cables should be visually inspected for damage or any sign of deterioration, broken wires or localized wear.
Inspect Side Keeper Bolts and Side Panels
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SCI SMART CUSHION®Inspection for Proper Installation (continued)
The SCI SMART CUSHION® is a 24” wide unit. To protect a barrier wider than 24” a transition needs to be installed. If needed, insure that the transition is properly assembled and anchored per the specifications as found in the manufacturer’s Design and Installation Manual.
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SCI SMART CUSHION®Inspection for Proper Installation
Final InspectionWalk the area to make sure all tools or other equipment have notbeen left within the SCI SMART CUSHION® structure.
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BARRIERS ANDCRASH CUSHIONS
FDOT Contacts:
ConstructionStefanie [email protected]
DesignCheryl [email protected]
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99 INTRODUCTION TO SITE-SAFE
286 North State Road 415Osteen, FL 32764Phone: 407.321.3024Fax: 407.321.3026Cell:270.792.0249
Site-Safe Products of Florida is a Certified Trinity TRACC Repair Center that houses a full inventory of TRACC, HEART , MPS-350 TMA & repair parts to assist contractors in meeting or exceeding FDOT(s) 24 hour response time for damaged roadway safety items.
Site-Safe Products of Florida specializes in quick response delivery…
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100 TRACC INSPECTIONTRACC(TRinity Attenuating Crash Cushion)
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101 TRINITY TRACC (RESETTABLE)
•ARRIVES ASSEMBLED•26 ANCHOR RODS•RESETTABLE DESIGN•NO CUSHIONS
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102 TRACC = NO BLACK BOX
Easily identify TRACC system; no cushions used with TRACC
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103 TRACC NOT DISPOSABLE
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104 ATTENUATOR INSPECTION
Foundation
AnchoringGalvanized Steel
Components
Hardware Transitions
Inspect
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105 FOUNDATION ANCHORING
•No more than ½” thread exposed•TRACCs require flat and lock washer…
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106 FOUNDATION ANCHORING
•Check tightness of anchor hardware…
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107 FOUNDATION ANCHORING
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108 FOUNDATION ANCHORING
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109 GALVANIZED STEEL COMPONENTS
•Units will have 1-4 rip plate stages
•Inspect for rip plate damage
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110 GALVANIZED STEEL COMPONENTS
•OVERHEAD OFBASE W/ RIPPLATES INSTALLED
•TL-2 UNIT2ea Base Assembly
•TL-3 UNIT3ea Base Assembly
•TL-3+ UNIT4ea Base Assembly
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111 GALVANIZED STEEL COMPONENTS
Rip Plate
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112 GALVANIZED STEEL COMPONENTS
•Sled slides on impact…•Cutter bar slices thru rip plate…•Friction slows vehicle…
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113 GALVANIZED STEEL COMPONENTS
DAMAGED
OKUSA
•Overhead of TRACC Rip Plates•No Cushions…•Look for damaged rip plates…•Look for damaged rip plates…
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114 GALVANIZED STEEL COMPONENTS
•Old Style TRACC•Rip Plates Mounted on Base Side•Photo of damaged rip plates
Cutter Bar
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115 GALVANIZED STEEL COMPONENTS
•NOSEPIECE•SLED•FRAMES•FENDERPANELS
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116 GALVANIZED STEEL COMPONENTS
•Look for bent components…•Check for missing components
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117 HARDWARE (L-BRACKETS)
INSTALL 4ea L-BRACKET PER TRACC UNIT INSTALLATION
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118 HARDWARE (BARRIER STRAPS)
FDOT DESIGN STANDARDINDEX 415
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119 TRANSITIONS
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120 TRANSITIONS
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121 WHAT’S MISSING????
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122 WHAT’S WRONG????
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123 WHAT’S MISSING????
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124 WHAT’S MISSING????
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125 QUESTIONS
286 North State Road 415Osteen, FL 32764Phone: 407.321.3024Fax: 407.321.3026Cell:270.792.0249?