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Temporary Barrier Systems

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  1. 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 Temporary Barrier Systems Florida Department of Transportation

  2. Temporary Barriers 5 Types

  3. Temporary Barriers 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. Precast Concrete 3 Types Precast Concrete Temporary Barriers

  5. Index 415 Barrier Wall Temporary Barriers 415 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. JJ Hook See QPL for vendor drawings Index 415 - JJ Hook Temporary Barriers Temporary Barriers

  7. Index 415 and JJ Hook

  8. Index 415 and JJ Hook • Required Between Other Types of Barriers • Transitions

  9. Index 415 and JJ Hook • Required Between Other Types of Barriers • Transitions

  10. Index 415 and JJ Hook • Required Between Other Types of Barriers • Transitions

  11. Index 415 and JJ Hook

  12. Index 415 and JJ Hook See Index 415 Sheet 1 Deflection Distance

  13. Index 415 and JJ Hook Traffic Side Deflection Space Installation Shielding Offset to Travel-way Work Zone Speed 45 mph or Less 1’ min. 2’ preferred 2’ min. Above Ground Hazards 2’ min. 4’ preferred 50 mph and Greater 4’ min. Right Shoulder 1’ min. 2’ preferred 45 mph or Less 2’ min. Drop-Off Hazards 50 mph and Greater a. Drop-Off 4’ or less and No Traffic below 2’ min. 4’ preferred 2’ min. a. All Drop-off conditions other than “a” 2’ min. 4’ preferred 4’ min.

  14. Index 415 and JJ Hook Traffic Side Traffic Side Deflection Space Installation Shielding Offset to Travel-way Work Zone Speed 45 mph or Less 1’ min. 2’ preferred 1’ min. 2’ preferred Adjacent Opposing Traffic Separating Traffic 2’ min. 4’ preferred 2’ min. 4’ preferred 50 mph and Greater

  15. Index 414 – Type K Temporary Barriers Temporary Barriers Type K 12’-6” Segment Length Only Type K barrier is approved for use on bridges

  16. Type K

  17. Type K • Required Between Type K Freestanding, Bolted, Staked and Back Filled • Required Between Other Types of Barriers • Transitions

  18. Type K

  19. Type K Deflection Distance

  20. Bolted Type K • See Index 414 - Sheet 5

  21. Type K • Staked • See Index 414 - Sheet 6

  22. Type K • Free Standing • Roadway • See Index 414 -Sheet 6

  23. Type K • Free Standing • Bridge • See Index 414 -Sheet 6

  24. Type K • Free Standing • Roadway Median • See Index 414 -Sheet 7

  25. Barrier System Placement 3 Types Precast Concrete • JJ Hook • Temporary Barriers • Type K • 415

  26. Barrier Terms Work Area Approach End – The portion of a barrier system exposed to approaching traffic.

  27. Barrier Terms Work Area Trailing End – Downstream end of a barrier system, not exposed to approaching Traffic.

  28. Barrier Terms Work Area Unidirectional – Exposed to traffic approaching from one direction only.

  29. Barrier Terms Work Area Bidirectional – Exposed to traffic approaching from opposing directions

  30. 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.

  31. Barrier Terms Work Area Departure Line - A line extending from the Point of Departure to the back of a hazard or Clear Zone

  32. 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 1:13 1:16 or 1:13 1:16 for speeds 45 mph or less 1:13 for speeds 50 mph or greater

  33. 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

  34. Barrier Terms Work Area extends OUTSIDE Clear Zone Limit use the Clear Zone Limit Distance Work Area Clear Zone Limit

  35. 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

  36. 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. X

  37. Barrier Terms(Length of Advancement) 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’

  38. 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

  39. 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

  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

  42. Low Profile Barrier • Deflection • Distance & Offset • Deflection Distance - 9 inch min • Approach End Offset – 6 foot min

  43. Low Profile Barrier

  44. Low Profile Barrier Portable Temp Low Profile Barrier Design Standard 412

  45. Water Filled Barriers 4 Systems: • Triton • Guardian • Yodock • Sentry See QPL

  46. Water Filled Barriers

  47. Temporary Guardrail • Same Requirements as Permanent Guardrail • Pay Item #102-73, LF Includes End Anchorage. • 2. Unless stated otherwise in the plans, temporary guardrail is the property of the contractor.

  48. Steel Barriers 4 Systems: • Barrier Guard • Orion • Vulcan • Zone Guard

  49. Steel Barriers

  50. Steel Barriers