FDOT Contacts:
District Construction
Marshall Douberley
863-519-2382
marshall.douberley
@dot.state.fl.us
Earl Taylor
863-519-2231
earl.taylor
@dot.state.fl.us
T EMPORARY B ARRIER S YSTEMS
T EMPORARY B ARRIERS
2
Steel
Precast
Concrete
Guardrail
5 Types
Water
Filled
Low
Profile
T EMPORARY B ARRIERS
3
Test Vehicles
NCHRP (National Cooperative Highway Research Program) 350: 820C and 2000P
MASH (Manual On Assessing Safety Hardware): 1100C and 2270P
Includes Passenger Cars Of All Sizes, Sport/Utility
Vehicles, Mini-Vans, Vans and Pick-up Trucks
TL-2 tested at 70 km/h (44 mph)
TL-3 tested at 100 km/h (62 mph)
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.
4
P RECAST C ONCRETE
Temporary
Barriers
5
I NDEX 415 B ARRIER WALL
Temporary
Temporary
Barriers
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
I NDEX 415 - JJ H OOK
6
Temporary
Temporary
Barriers
Barriers
7
I NDEX 415 AND JJ H OOK
• 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
8
I NDEX 415 AND JJ H OOK
• Required Between Other Types of
Barriers
9
I NDEX 415 AND JJ H OOK
• Required Between Other Types of
Barriers
10
I NDEX 415 AND JJ H OOK
• Required Between Other Types of
Barriers
11
I NDEX 415 AND JJ H OOK
• 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
12
I NDEX 415 AND JJ H OOK
I NDEX 415 AND JJ H OOK
13
Traffic Side
Installation
Right
Shoulder
Shielding
Above
Ground
Hazards
Work Zone Speed
45 mph or Less
50 mph and Greater
45 mph or Less
Drop-Off
Hazards
Offset to
Travel-way
1’ min.
2’ preferred
2’ min.
4’ preferred
1’ min.
2’ preferred
Deflection
Space
2’ min.
4’ min.
2’ min.
50 mph and Greater
a. Drop-Off 4’ or less and No Traffic
below
a. All Drop-off conditions other than
“a”
2’ min.
4’ preferred
2’ min.
4’ preferred
2’ min.
4’ min.
I NDEX 415 AND JJ H OOK
14
Traffic Side
Installation
Shielding
Separating
Traffic
Adjacent
Opposing
Traffic
Traffic Side
Work Zone Speed
45 mph or Less
50 mph and Greater
Offset to
Travel-way
1’ min.
2’ preferred
2’ min.
4’ preferred
Deflection
Space
1’ min.
2’ preferred
2’ min.
4’ preferred
I NDEX 414 – T YPE K
15
Temporary
Temporary
Barriers
Barriers
12’-6” Segment Length
Only Type K barrier is
approved for use on bridges
T YPE K
16
Installation
Surface
• Bolted
• Staked
• Free Standing
• Backfilled
• Rigid Pavement (Concrete)
• Flexible Pavement (Asphalt)
• Cross Slope of 1 to 10 or flatter
Transitions
• Required Between Type K Freestanding,
Bolted, Staked and Back Filled
• Required Between Other Types of Barriers
Deflection
Distance
• Varies on Type of Installation (above), Use,
Location and Speed
T YPE K
17
Transitions
• Required Between Type K Freestanding,
Bolted, Staked and Back Filled
• Required Between Other Types of Barriers
T YPE K
18
Installation
Surface
• Bolted
• Staked
• Free Standing
• Backfilled
• Rigid Pavement (Concrete)
• Flexible Pavement (Asphalt)
• Cross Slope of 1 to 10 or flatter
Transitions
• Required Between Type K Freestanding,
Bolted, Staked and Back Filled
• Required Between Other Types of Barriers
Deflection
Distance
• Varies on Type of Installation (above), Use,
Location and Speed
T YPE K
19
Deflection Distance
Bolted
• See Index 414 - Sheet 5
Staked
• See Index 414 - Sheet 6
Free
Standing
Back Filled
• See Index 414 -Sheet 6 & 7
• See Index 414 - Sheet 7
T YPE K
20
Bolted
• See Index 414 - Sheet 5
T YPE K
21
Staked
• See Index 414 - Sheet 6
T YPE K
22
Free Standing
Roadway
• See Index 414 -Sheet 6
T YPE K
23
Free Standing
Bridge
• See Index 414 -Sheet 6
24
T YPE K
Free Standing
Roadway Median• See Index 414 -Sheet 7
25
B ARRIER S YSTEM P LACEMENT
Temporary
Barriers
B ARRIER T ERMS
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Approach End – The portion of a barrier
system exposed to approaching traffic.
Work Area
B ARRIER T ERMS
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Trailing End – Downstream end of a barrier
system, not exposed to approaching Traffic.
Work Area
B ARRIER T ERMS
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Unidirectional – Exposed to traffic approaching from
one direction only.
Work Area
B ARRIER T ERMS
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Bidirectional – Exposed to traffic approaching from
opposing directions
Work Area
B ARRIER T ERMS
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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.
Work Area
B ARRIER T ERMS
31
Departure Line - A line extending from the Point of
Departure to the back of a hazard or Clear Zone
Work Area
B ARRIER T ERMS
32
Departure Rate - The rate at which the Departure Line leaves
the roadway and extends to the back of a hazard or CZ.
Work Area
1:16 for speeds 45 mph or less
1:13 for speeds 50 mph or greater
B ARRIER T ERMS
33
Work Area INSIDE Clear Zone Limit use the
Back of Hazard or Back of Work Area Inside Clear Zone
Clear Zone Limit
Work Area
B ARRIER T ERMS
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Work Area extends OUTSIDE Clear Zone Limit
use the Clear Zone Limit Distance
Clear Zone Limit
Work Area
B ARRIER T ERMS
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Beginning Length of Need- The point at which a barrier
intersects the Departure Line establishes the Beginning of
the Length of Need
Work Area
B ARRIER T ERMS
36
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.
Work Area
X
B ARRIER T ERMS
37
( L ENGTH
OF
A D VANC E M E NT )
X
D
d
Example for 45 mph with CZ of 18’ with
barrier set at 2’ from Edge of Travel Way
and Work Area extends 20’ from Edge of
Travel Way
X = 16 (18-2)
X = 256’
B ARRIER T ERMS
38
Length Of Need Unidirectional – Barrier needed is from
the approach departure line to the trailing departure line.
Work Area
Length of Barrier System Needed
B ARRIER T ERMS
39
Length Of Need Bidirectional – Barrier needed is from the
approach departure line to the trailing departure line
Work Area
Length of Barrier Wall Needed
40
L OW P ROFILE B ARRIER
Intended for use in Urban Areas where sight distance for side
streets and driveways may be a problem.
L OW P ROFILE B ARRIER
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Application
• Design Speeds of 45 mph or less
Surface
• Cross Slope of 1 to 10 or flatter
Supplemental
Devices
Deflection
Distance &
Offset
• Along the run of barrier:
• Tubular Markers
• 50’ cc Tangent; 25’ cc radii
• Approach end:
• Type 1 Object Marker
• Deflection Distance - 9 inch min
• Approach End Offset – 6 foot min
L OW P ROFILE B ARRIER
42
Deflection
Distance &
Offset
• Deflection Distance - 9 inch min
• Approach End Offset – 6 foot min
43
L OW P ROFILE B ARRIER
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L OW P ROFILE B ARRIER
P ORTABLE T EMP L OW P ROFILE B ARRIER
D ESIGN S TANDARD 412
WATER F ILLED B ARRIERS
45
4 Systems:

Triton

Guardian

Yodock

Sentry
See QPL
46
WATER F ILLED B ARRIERS
47
T EMPORARY G UARDRAIL
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.
S TEEL B ARRIERS
48
4 Systems:

Barrier Guard

Orion

Vulcan

Zone Guard
S TEEL B ARRIERS
49
Installation
• Bolted (Rigid Pavement)
• Anchored (Flexible Pavement)
Surface
• Rigid Pavement (Concrete)
• Flexible Pavement (Asphalt)
• Cross Slope of 1 to 10 or flatter
Transitions
• Required Between Other Types of Barriers
Deflection
Distance
• Varies on Type of Installation (above),
Location, Speed, and Manufacture
50
S TEEL B ARRIERS
51
PAY I TEMS
Steel Barrier is alternate design to Type K Barrier!
Q UESTIONS ????????????????