florida department of transportation t emporary b arrier s ystems fdot contacts: district...
TRANSCRIPT
Florida Department of Transportation
TEMPORARY BARRIER SYSTEMS
FDOT Contacts:
District ConstructionMarshall [email protected]
Earl [email protected]
2 TEMPORARY BARRIERS
Steel
Precast Concrete
Low Profile
Water Filled
Guardrail
5 Types
TEMPORARY BARRIERS
Test VehiclesNCHRP (National Cooperative Highway Research Program) 350: 820C and 2000PMASH (Manual On Assessing Safety Hardware): 1100C and 2270P
Includes Passenger Cars Of All Sizes, Sport/Utility Vehicles, Mini-Vans, Vans and Pick-up Trucks
NCHRP 350 = 820C (1800 lb.) Passenger Car @ 20 deg.MASH = 1100C (2420 lb.) @ 25 deg.
NCHRP 350 = 2000P (4400 lb.) Pickup Truck @ 25 deg. MASH = 2270P (5000 lb.) @ 25 deg.
TL-2 tested at 70 km/h (44 mph)
TL-3 tested at 100 km/h (62 mph)
3
4 PRECAST CONCRETE
JJ Hook
415 Type KTemporary Barriers
3 TypesPrecast
ConcreteTemporary
Barriers
5 INDEX 415 BARRIER WALL
Temporary Barriers
415
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
6 INDEX 415 - JJ HOOK
Temporary Barriers
Temporary Barriers
JJ HookTemporary
Barriers
See QPL for vendor drawings
7 INDEX 415 AND JJ HOOK
• Free StandingInstallation
• Rigid Pavement (Concrete)• Flexible Pavement (Asphalt)• Cross Slope of 1 to 10 or flatter
Surface
• Required Between Other Types of BarriersTransitions
• Varies on Use, Location and SpeedDeflectionDistance
• Required Between Other Types of Barriers
8 INDEX 415 AND JJ HOOK
Transitions
• Required Between Other Types of Barriers
9 INDEX 415 AND JJ HOOK
Transitions
• Required Between Other Types of Barriers
10 INDEX 415 AND JJ HOOK
Transitions
11 INDEX 415 AND JJ HOOK
• Free StandingInstallation
• Rigid Pavement (Concrete)• Flexible Pavement (Asphalt)• Cross Slope of 1 to 10 or flatter
Surface
• Required Between Other Types of BarriersTransitions
• Varies on Use, Location and SpeedDeflectionDistance
12 INDEX 415 AND JJ HOOK
Deflection Distance
See Index 415 Sheet 1
13 INDEX 415 AND JJ HOOK
Installation Work Zone Speed Offset to Travel-way
Right Shoulder
45 mph or Less
50 mph and Greater
DeflectionSpace
Shielding
1’ min.2’ preferred2’ min.4’ preferred
Traffic Side
AboveGroundHazards
1’ min.2’ preferred
45 mph or Less
Drop-OffHazards 50 mph and Greater
2’ min.4’ preferred2’ min.4’ preferred
a. Drop-Off 4’ or less and No Traffic below
a. All Drop-off conditions other than “a”
2’ min.
4’ min.
2’ min.
2’ min.
4’ min.
14 INDEX 415 AND JJ HOOK
Installation Work Zone Speed Offset to Travel-way
SeparatingTraffic
45 mph or Less
50 mph and Greater
DeflectionSpace
Shielding
1’ min.2’ preferred2’ min.4’ preferred
AdjacentOpposing
Traffic
1’ min.2’ preferred2’ min.4’ preferred
Traffic Side Traffic Side
15 INDEX 414 – TYPE K
Temporary Barriers
Temporary Barriers
Temporary Barriers
Type K
Only Type K barrier is approved for use on bridges
12’-6” Segment Length
16 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
TYPE K
• Required Between Type K Freestanding, Bolted, Staked and Back Filled
• Required Between Other Types of BarriersTransitions
17
18 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
19 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
TYPE K
• See Index 414 - Sheet 5Bolted
20
TYPE K
• See Index 414 - Sheet 6Staked
21
TYPE K
• See Index 414 -Sheet 6 Free StandingRoadway
22
TYPE K
• See Index 414 -Sheet 6Free StandingBridge
23
TYPE K
• See Index 414 -Sheet 7Free StandingRoadway Median
24
BARRIER SYSTEM PLACEMENT
JJ Hook
415 Type K
3 TypesPrecast
ConcreteTemporary
Barriers
25
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 or 1:131:16 or 1:13
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 the Back 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 Limit use the Clear Zone Limit Distance
Clear Zone LimitWork Area
34
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.
36
X
D
d
X
Example for 45 mph with CZ of 18’ withbarrier set at 2’ from Edge of Travel Wayand Work Area extends 20’ from Edge of Travel Way
X = 16 (18-2)X = 256’
BARRIER TERMS( L E N GT H O F A DVA N C E M E N T )
37
BARRIER TERMS
Work Area
Length Of Need Unidirectional – Barrier needed is from the approach departure line to the trailing departure line.
Length of Barrier System Needed
38
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
39
40 LOW PROFILE BARRIER
Intended for use in Urban Areas where sight distance for side streets and driveways may be a problem.
41 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
42 LOW PROFILE BARRIER
• Deflection Distance - 9 inch min• Approach End Offset – 6 foot min
DeflectionDistance &
Offset
LOW PROFILE BARRIER43
LOW PROFILE BARRIER44
PORTABLE TEMP LOW PROFILE BARRIER DESIGN STANDARD 412
4 Systems: Triton
Guardian
Yodock
Sentry
45 WATER FILLED BARRIERS
See QPL
WATER FILLED BARRIERS46
47 TEMPORARY GUARDRAIL
Same Requirements as Permanent Guardrail
1. Pay Item #102-73, LF Includes End Anchorage.
2. Unless stated otherwise in the plans, temporary guardrail is the property of the contractor.
STEEL BARRIERS
4 Systems: Barrier Guard
Orion
Vulcan
Zone Guard
48
STEEL BARRIERS
• Bolted (Rigid Pavement)• Anchored (Flexible Pavement)Installation
• Rigid Pavement (Concrete)• Flexible Pavement (Asphalt)• Cross Slope of 1 to 10 or flatter
Surface
• Required Between Other Types of BarriersTransitions
• Varies on Type of Installation (above), Location, Speed, and Manufacture
DeflectionDistance
49
STEEL BARRIERS50
PAY ITEMS51
Steel Barrier is alternate design to Type K Barrier!
QUESTIONS ????????????????