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W-Beam to thrie beam transitions at bridges

Question
State NJ
Description Text

Midwest States Pooled Fund
members,



NJDOT currently does not use a
separate pay item for the W-beam to thrie beam transitions at bridges. 
The cost for these transitions are included in the price of the guide
rail.  Now that NJDOT will be switching to the 31” MGS after 12/31/2017,
these transitions are significantly longer than the NCHRP 350 transitions and
we are considering separate pay items.



 



Can you please answer the
following questions on the practice in your state:



 



1.      Do you currently have a
separate pay item(s) for w-beam to thrie beam stiffness transitions at bridges?



2.      Will you be using a
separate pay item(s) for w-beam to thrie beam stiffness transitions at bridges
after MASH implementation?



3.      If you answered yes to
question 1 or 2 above, what are your separate pay items called? Do you use a
separate pay item for approach and trailing ends?



4.      Are you now or in the
future (due to MASH implementation) using a separate pay item(s) for stiffening
the guide rail where a fixed object (IE: utility pole, pier, sign structure,
etc) is less than 4 feet from face of rail element?  If yes, what are your
separate pay items called.



 

Keywords
  • Approach Guardrail Transitions
Other Keywords none
Date March 30, 2017


Response
Response

David,

 

See Illinois responses below in RED.

 

___________________________________________________________________________

Midwest States Pooled Fund members,

NJDOT currently does not use a separate pay item for the W-beam to thrie beam transitions at bridges.  The cost for these transitions are included in the price of the guide rail.  Now that NJDOT will be switching to the 31” MGS after 12/31/2017, these transitions are significantly longer than the NCHRP 350 transitions and we are considering separate pay items.

 

Can you please answer the following questions on the practice in your state:

 

1.     Do you currently have a separate pay item(s) for w-beam to thrie beam stiffness transitions at bridges?  YES

2.     Will you be using a separate pay item(s) for w-beam to thrie beam stiffness transitions at bridges after MASH implementation? YES

3.     If you answered yes to question 1 or 2 above, what are your separate pay items called? Do you use a separate pay item for approach and trailing ends?

Connection to a concrete parapet or other concrete structure is TRAFFIC BARRIER TERMINAL, TYPE 6.  This is Highway Standard 631031.

Connection to a steel bridge rail is called TRAFFIC BARRIER TERMINAL, TYPE 6A.   This is Highway Standard 631032.

Connection to a concrete structure and not using a curb is called TRAFFIC BARRIER TERMINAL, TYPE 6B.  This is Highway Standard 631033.

 

You can review these at our Highway Standards: http://www.idot.illinois.gov/doing-business/procurements/engineering-architectural-professional-services/Consultants-Resources/highway-standards-and-district-specific-standards

You can find the coded pay items here: https://www.google.com/url?q=http://www.idot.illinois.gov/Assets/uploads/files/Doing-Business/Specialty-Lists/Highways/Design-%26-Environment/Coded-Pay-Items/January-16-2015-Letting/CodedPayItemsHwy20150116.pdf&sa=U&ved=0ahUKEwjPrcOY6f7SAhXh5oMKHQhxDuEQFggHMAE&client=internal-uds-cse&usg=AFQjCNE8bvrnXfiy4U8l7oWNqlnH6-j74Q

 

4.     Are you now or in the future (due to MASH implementation) using a separate pay item(s) for stiffening the guide rail where a fixed object (IE: utility pole, pier, sign structure, etc) is less than 4 feet from face of rail element?  If yes, what are your separate pay items called.

Yes, guardrail with 6’-3” post spacing is STEEL PLATE BEAM GUARDRAIL, TYPE A. Guardrail with 3’-1 ½” post spacing is called STEEL PLATE BEAM GUARDRAIL, TYPE B. We do not have guardrail post spacing of 1’ 6 ¾” depicted on a Standard, but it could be included as a plan detail with a unique pay item. Both Type A and Type B are shown on Highway Standard 630001 at the same link referenced above.

 

 

Date March 30, 2017


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