1 / 39

Spring 2013 Section Engineers Conference March 5, 2013

Spring 2013 Section Engineers Conference March 5, 2013. Guardrail Items Terry Chism, Div of Const. Yes, there are & will be more changes and clarification for Guardrail.

tlauren
Download Presentation

Spring 2013 Section Engineers Conference March 5, 2013

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spring 2013 Section Engineers ConferenceMarch 5, 2013 Guardrail Items Terry Chism, Div of Const.

  2. Yes, there are & will be more changes and clarification for Guardrail • Many of the changes being made now are the results of the comments received from the Field during the Guardrail Installation Training. • You made the difference with your concerns and comments – YOU DID GOOD!!!

  3. Guardrail Mounting Height Important -What is Maintenance to do on Damaged Guardrail?? • 27” Guardrail that is damaged will be replaced to a minimum height of 27” • If existing NCHRP 350/MASH Approved Guardrail End Treatments are damaged they may be repaired – if destroyed - then replace with current KY Approved NCHRP 350/MASH End Treatments • If non-NCHRP 350/MASH Guardrail End Treatments are damaged they must to be replaced with current NCHRP 350/MASH End Treatments

  4. Proprietary Guardrail End Treatments will remain at 27”Mounting Height • KY will continue using NCHRP 350 Approved 27” Guardrail End Treatments until 29” End Treatments are Tested and Approved • TRANSITION: Utilize the last 2 sections of 12’ 6” Guardrail (25’) prior to the Pay Limits of the End Treatment to Transition from the 29”Guardrail Mounting Height to the 27” End Treatment --- ie do not change the mounting height within the pay limits of the end treatment

  5. Mounting Height for Type 2A and Type 3 End Treatments is 29” +/- 1” • WHY?? These End Treatments are Built with Generic Materials – they are not Proprietary • Beginning with the June 2012 Letting • Sect 719.03 KY 2012 Standard Specifications has been changed to read “Construct guardrail 29 inches to the top of the rail, with a tolerance of plus or minus one inch above the theoretical pavement elevation” (shoulder slope extended)

  6. Std Draw BHS-008 Rail System Type 3: Replaced by Sepia #0066-15-2012 - Changed dimension 1’ 9” dimension Changed to 1’ 11”

  7. Std Draw RBR-025-05 Guardrail End Treatment Type 2A Replaced by Sepia #07 6-15-12 – Added Details

  8. Std Draw RBR-005-10 Guardrail Components Replaced by Sepia #008 6-15-2012 Removed Cable Detail Cable Detail Removed

  9. Std Draw RBE-100-09 Crash Cushion Type VI-BT & CT Replaced by Sepia #009 8-24-2012 Note: A Class CT (reusable or self restoring) can be Used at the Contractors Discretion

  10. Std Draw RBR-001-11 Steel Beam Guardrail (W Beam) Replaced by Sepia #012 12-11-2012 Removed Requirement & Detail for Back-up Plate – Permanent Change Permits the use of both 12’ 6” & 25’ Guardrail Sections May & June Lettings

  11. Sepia #12 Replaces RBR-001NO Backup Plates NeededAllows 12’6” & 25’ Rail Sections RBR-001 Sepia #012

  12. Low Fill Culverts with Guardrail Spans up to 25’ Without Post – What do we do??

  13. For Low Fill Culverts 25’ OpeningUse RBR-031 Guardrail End Treatment Type 3 Pipe Drainage

  14. Type 7 End Treatment • 50 Foot (2 break away post) Turndown end treatment attached to concrete anchor block (MUST HAVE). Flared 0’ to 4’ (desirable) from the normal guardrail line • Note 3 Std Draw RBR-050 “This guardrail end treatment is not for use on approach end on high speed NHS.”

  15. Critical!!!Type 7 Concrete Anchor • The concrete anchor block may • be precast or cast-in-place. When • the anchor is cast-in-place forming • of the sides shall be required.

  16. Bill Gulick say’s Type 7 Alternate End Treatment OK

  17. Bill Gulick say’s Type 7 Alternate End Treatment OK

  18. Do NOT Use this Drawing with the Title Block with Manufacture on it

  19. Use this Drawing with the Title Block without Manufacture on it

  20. Deflections Bridge Pier NOT Considered – Cap within 2’Heavy Coal Haul Route

  21. New York City Bus CrashHigh Center Gravity VehicleNormal Guardrail to Close

  22. Design, Construction & Maintenance be Aware!!! • Just because a Guardrail End Treatment is in place or in a set of plans it doesn’t make it right!!!!: • It may NOT be at the proper location • It may not be the best end treatment for that location • Design & Consultants need to check in the field – so often 3R/4R plans place new treatments at the old/current location (may be 30 years old & incorrect)

  23. Design, Construction & Maintenance be Aware!!! • Maintenance & Safety Projects need to be checked in the field for proper End Treatment Type and Location • Construction can/should make changes whenever they note an end treatment in the plans that does not look correct • When a Guardrail End Treatment is damaged and needs replaced, a field determination should be made as to proper Type and Location

  24. Old BCT Replaced with Type 1 @ same Location – NOT long Enough to Shield hazard

  25. Minimum Length of Guardrail - including End Treatment – before a Fixed Object – 200 Feet Typical Guardrail Installations: Std Draw RBI-001, 002, Std Draw RBI-004 Type 1 Std Draw RBI-005 Bridge Column Std Draw RBI-006 Sign Support ALL CONTAIN THE FOLLOWING NOTE: ALL CONTAIN THE FOLLOWING NOTE: Std Draw RBB-001 & 002 Guardrail & Bridge End Std Draw RBB-010 Guardrail Transition From Normal Shd To Narrow Bridge

  26. Per Bill Gulick “You CANNOT Disconnect (or separate) Grading and Guardrail”

  27. Grading Requirements Pads & SlopesGetting Good Pads but Poor Slopes beside PadsGuardrail End Treatments Type 1 & 4A’s 2012 Std Draw shows 5’ of widening in the “Adjacent” area behind the guardrail – Sect A-A Side slopes 4:1 Desirable 3:1 Max

  28. Extruder Head should be Parallel to the Guardrail/Ground – Not dipping down like these

  29. Extruder Heads shall be Parallel to the Guardrail/Ground – Not dipping down like this

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

  31. Problems with Older ET’s with Wood Post • Lag Screws stripped and fall out – either replace Post or Rotate Old Post 180 Degrees and install new Lag screws (Pilot Holes)

  32. By Change Order – any/all of the following may be changed on Pre June 2012 Projects • Guardrail Mounting Height 27” to 29” • Change old stiff Type 2A End Treatment to newer, softer Type 2A – Sepia 007 (no concrete required) • Guardrail Post in Rock can be changed to the new method of installation (no concrete required) • Delete backup plates • Can be combined in one Change Order

  33. Questions or Problems with new Guardrail Specifications or Standard Drawings • Give me a call and we can discuss to help determine what changes or clarifications need to be made • 502-564-4780 • terry.chism@ky.gov • I will work with Jeff Lail, Bill Gulick, Nasby Stroop, Rachel Mills etc. to Correct • I work Part Time so keep trying to get me

  34. Yes, there are & will be more changes and clarification for Guardrail • Many of the changes being made now are the results of the comments received from the Field during the Guardrail Installation Training. • You made the difference with your concerns and comments – YOU DID GOOD!!!

  35. Closing • Thank you for your attention • Hope you have found this presentation and the Guardrail Installation Training to be Useful and Informative • More Classes in March • Questions??

  36. 2012 Standard Specification Section 719.03Guardrail:New Requirement • “Prior to ordering guardrail materials the Engineer and the Contractor shall meet on the job site to check the guardrail end treatments locations designated in the plans against actual field conditions to determine if the locations and end treatment  types are appropriate.  Adjustments will be made as appropriate and final location and end treatment types will be approved by the engineer.  If considered necessary, the Engineer will consult with the Division of Design.” • Comments, performed any, useful, made changes??

More Related