Alternate Pipe Materials Policy

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Alternate Pipe MaterialsPolicy Procedure

• NDDOT Project Development Conference
• November 18th 19th, 2008

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Alternate Pipe MaterialsPolicy Procedure
Top 4 Questions

• NDDOT Project Development Conference
• November 18th 19th, 2008

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Alternate Pipe Materials

• Top 4 questions about the Alternate Pipe
  Materials - Policy Procedure?
• 4. What is the Policy Procedure?

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Alternate Pipe Materials

• Two Part Document
• Policy
• States the intent of the NDDOT to consider the
  use of alternate pipe materials on projects.
• Procedure
• States the selection criteria and processes to be
  used in evaluating whether alternate pipe
  materials should be allowed for specific
  applications.
• Will be available in the NDDOT Design Manual

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Alternate Pipe Materials - Policy

• Policy Statement
• The North Dakota Department of Transportation
  will allow all available pipe products
  (materials) that are judged to be of satisfactory
  quality and equally acceptable on the basis of
  engineering, economic analysis, and NDDOT
  experience.

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Alternate Pipe Materials Policy

• Identifies specific policy provisions (criteria
  for usage)
• Provide adequate hydraulic capacity.
• Withstand forces of the weight of the fill over
  the pipe.
• Withstand forces of traffic loads and
  construction equipment during pipe installation
  and under post construction conditions.
• Withstand hydrostatic pressure to prevent fluid
  from leaking out of the pipe into the surrounding
  bed materials when water tight joints are
  required.
• Provide adequate service life in relation to the
  AASHTO culvert service life guidelines.

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Alternate Pipe Materials Policy

• Withstand corrosion caused by the fluids conveyed
  by the pipe and the soil surrounding the pipe.
• Withstand abrasion from solids carried by the
  flow.
• Withstand fire and combustion.
• Be constructible within the constraints of the
  site.
• Consider local government preferences, but all
  construction projects shall comply with the
  requirements of the Final Rule.
• Fulfill the need for experimental installations
  and/or Materials Research product review.

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Alternate Pipe Materials Procedure

• Consider alternate pipe materials currently
  covered by NDDOT Specifications for the following
  applications
• Concrete Pipe
• NDDOT Specifications 714.02 830.01
• Mainline, Approach, and Storm Drain
• Metal Pipe
• NDDOT Specifications 714.02 830.02
• Mainline, Approach, and Storm Drain
• Plastic Pipe
• NDDOT Specifications 714.02 830.03
• Approach, and Storm Drain (not under paved
  roadway)

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Alternate Pipe Materials Procedure

• The North Dakota Department of Transportation
  will follow its standard practices for the
  hydraulic and structural design of pipes.
• Material Standards
• AASHTO ASTM
• Installation Standards
• AASHTO
• NDDOT experience and research
• Other DOT experience and research

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Alternate Pipe Materials Procedure

• The NDDOT will adopt additional performance
  criteria that will be used to evaluate the
  acceptability of alternate pipe materials based
  on application, local and regional factors.
• Performance criteria include requirements for
• Hydraulic and hydrostatic adequacy
• Abrasion resistance
• Corrosion resistance
• Structural adequacy
• Inflammability (site specific)
• Selection Process includes tools
• Evaluation flowcharts
• Abrasion, corrosion, flammability tables
• Corrosion zone map

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Alternate Pipe Materials

• Top 4 questions about the Alternate Pipe
  Materials - Policy Procedure?
• 3. Why was the Policy Procedure needed?
• 4. What is the Policy Procedure?

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Alternate Pipe Materials

• To be in compliance with SAFETEA-LU
• The Final Rule (November 2006) published to
  implement Section 5514 of SAFETEA-LU
• Key elements of the decision, NDDOT Policy must
• Support competitive bidding principles of the
  CFR.
• Consider alternate pipe materials based on
  engineering and economic analysis.
• Document material selection decisions on a
  project or program basis.

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Alternate Pipe Materials

• Top 4 questions about the Alternate Pipe
  Materials - Policy Procedure?
• 2. How was the Policy Procedure developed?
• 3. Why was the Policy Procedure needed?
• 4. What is the Policy Procedure?

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Alternate Pipe Materials

• Design Division developed the basic framework in
  2007
• 1st draft sent to FHWA for review and comment
• Define the NDDOT Policy
• Define the selection Procedure or criteria
• Both must comply with the intent of the Final
  Rule
• and SAFETEA-LU
• Materials Research was asked to develop a
  Policy Procedure, and revise installation
  details

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Alternate Pipe Materials

• Over the Past 9 Months
• Held video conference with the NDDOT Divisions
  Districts.
• Met with structural and hydraulic sections from
  Bridge and Design Divisions.
• Reviewed AASHTO design standards and
  recommendations.
• Interviewed several DOTs and reviewed their
  Policies.
• Held discussions with the concrete, metal, and
  plastic pipe industry.
• Submitted numerous drafts to FHWA and Executive
  Management for review, comment, and revision.
• Advertised one general public, and two pipe
  industry review comment periods.

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Alternate Pipe Materials

• Top 4 questions about the Alternate Pipe
  Materials - Policy Procedure?
• 1. How will the Policy Procedure be
  implemented?
• 2. How was the Policy Procedure developed?
• 3. Why was the Policy Procedure needed?
• 4. What is the Policy Procedure?

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Major Design Components

• Need to work through the items on the flow charts
  included in the Alt Pipe Material Policy
• 3 flow charts have been developed
• Correspond with tables developed in the Policy
  and previously existing data

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Material Selection Flowchart
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Data Tables for Material Selection

• Abrasion Table

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Data Tables for Material Selection

• Corrosion Data

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Data Tables for Material Selection

• Flammability Table

• Backfill Height Table
• (Structural Requirements)

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Major Design Components

• Need to work through the items on the flow charts
  included in the Alt Pipe Material Policy
• 3 flow charts have been developed
• Correspond with tables developed in the Policy
  and previously existing data
• Need to document which materials are acceptable
  at specific locations and why any material didnt
  meet requirements

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Major Design Components

• Additional and Changed Standard Drawings
• 4 new Standard Drawings for excavation backfill
• Existing Pipe Standard Drawings had backfill
  height information removed
• Standard D-203-08 has been updated to reflect
  installation/testing instructions for approach
  pipe

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New Standards
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Major Design Components

• Additional Standard Drawings
• New bid items will be used

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Bid Items

• 3 bid items will be used
• Pipe Conduit __ IN Typical transverse centerline
  culvert
• Pipe Conduit __ IN Storm Drain Urban drainage
  limited to those pipes with a Mannings n
  value of 0.013 or lower.
• Pipe Conduit __ IN Approach

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Bid Items

• 3 bid items will be used dependant on type of
  installation being done
• Changes to what is included in those bid items
• Aggregate Now included in price of Pipe Conduit
• End Sections No longer paid for separately
• Change in method of measurement
• Pipe length now measured along the top of the
  conduit rather than on the flow line

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Backfill Detail
Pipe Pay Length
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Major Design Components

• Additional Standard Drawings
• New bid items will be used
• New Pipe List plan sheet

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Example Pipe List Plan Sheet
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Implementation Summary

• Follow flow charts document limitations
• New and changed Standard Drawings
• New bid items
• No longer paying for Aggregate or End Sections
• New Pipe List Plan Sheet
• Supplemental Specifications

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?Questions?

• ?
• ? ? ?
• ? ?

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?Questions?

• Justin Ramsey
• 328-1217
• jramsey_at_nd.gov