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Reinforcing Steel and Welded Wire Reinforcement(REBAR/WWR)
Approximately 20 of the 50 State Departments of Transportation (DOT’s) performed some form of plant audit (a.k.a. Certification Program, Quality Monitoring Program, etc.) for the acceptance of reinforcing steel. Producing mills were subjected to several of these audits annually. Each DOT program was different and the results were not transferable from state to state. State DOT’s who performed these audits must perform an audit at
mill location requesting qualification.
A “national” program was requested by State DOT’s and the reinforcing steel industry to: “
Establish a uniform procedure for approving reinforcing steel mills who furnish product for State DOT use.
” The NTPEP Committee Work Plan for the Evaluation of Reinforcing Steel Manufacturers was jointly developed by the reinforcing steel bar industry and State DOT’s for this purpose. The Work Plan can be found by clicking on the Documents menu item on the NTPEP Committee Work Plan for the Evaluation of Reinforcing Steel Manufacturers was jointly developed by the reinforcing steel bar industry and State DOT’s for this purpose. The Work Plan can be found by clicking on the Documents menu item on the menu to your right.
Skip to REBAR/WWR Contact Information
The program begins with a review of the mill’s quality system manual (Ref.: AASHTO R 18, Section 6). The audit emphasizes:
The mill’s quality system – for compliance with the mill’s Quality Manual
The mill’s testing procedures – for compliance with the appropriate material specification (Ref.: AASHTO R 18, Section 5.4).
Next, an on-site audit is performed by the Qualification Agency. This audit reviews:
Production of Steel
Material Testing – on selected samples
Records and Mill Test Reports
Split Sample Testing
The annual audit determines whether the producing mill has the capabilities to consistently meet the specification (AASHTO/ASTM) requirements for the bar product produced.
Once the audit is completed, the results of the audit are reviewed. NTPEP maintains the results of the audit on their website (
). NTPEP will also publish a list showing which mills have successfully met the requirements of the audit. Each DOT then determines whether the mills are approved or not based upon their established criteria (Ref.: the particular DOT’s specification).
Actual test data and/or audit reports will not be visable to the public. Audit documents can only be view by DOT representatives and the audited manufacturer. This location may also include additional information (such as: the standard sizes produced, number of furnaces, types of material produced, etc.) for use by the DOTs.
All participating mills desiring to continue under the program, will be re-evaluated on an annual basis.
A standard “audit form” has been developed for recording the results of the audit. The Audit Form is an information gathering form to be used in conjunction with worksheets, mill test reports, the mill’s Quality Manual, et cetera.
AASHTO’s Subcommittee on Materials (SOM) is comprised of the State DOT Materials Engineers and oversees the work of NTPEP. National Transportation Product Evaluation Program (NTPEP) is the Program Administrator and their Reinforcing Steel Technical Committee (comprised of representatives of several DOTs ) is responsible for:
Evaluating the results of corrective actions taken by the producing mill (Ref. Section 5.5.3. and 5.9.)
Addressing modifications to the specification.
Manufacturing auditors employed by AASHTO conduct the audits for the NTPEP Audit Program.
The program can be used as follows:
Only means of acceptance for reinforcing steel
In conjunction with job sampling and testing (as a Total Quality Assurance package).
It is anticipated that all State DOTs will use this program.
The NTPEP Technical Committee responsible for authoring the Project Work Plan convenes yearly at the NTPEP National (Annual) Meeting. During this working meeting, the Project Work Plan is discussed, changes made, and shortly thereafter balloted for adoption. Improvements are immediately implemented in the next available audit tour. When compared to other standards development exercises, the NTPEP process is agile, effective and efficient.
Technical Committee Members
This roster is as up-to-date as AASHTO's official membership database. The columns are sortable by clicking on the column title.
NTPEP-Technical Committee on Reinforcing Steel
Restore to Default Order
Zwanka, Merrill E
South Carolina Department of Transportation
Hughes, Scott Eric
Illinois Department of Transportation
American Association of State Highway and Transportation Officials
Pickett, William B.
Alabama Department of Transportation
Alabama Department of Transportation
San Angelo, Michael
Alaska Department of Transportation and Public Facilities
Lukkarila, Paul Q.
California Department of Transportation
Pelham, Michael Paul
Indiana Department of Transportation
Blackburn, Andrew Blackburn
Indiana Department of Transportation
Khoda, Mahbub E
Iowa Department of Transportation
Kansas Department of Transportation
Morris, Justin W
Louisiana Department of Transportation and Development
Maine Department of Transportation
Porter, Stephen Randolph
North Carolina Department of Transportation
Seward, Kenny R.
Oklahoma Department of Transportation
Janak, Karl J
Texas Department of Transportation
Utah Department of Transportation
Wagner, Richard Thomas
Insteel Wire Products
Nucor Steel Connecticut, Inc.
Merill Zwanka (Chairman)
South Carolina DOT
Ed Hughes (Vice-Chairman)
Michael San Angelo
Kentucky Transportation Cabinet
Concrete Reinforcing Steel Institute
Robert Sarcinella, AASHTO Liaison,
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