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Demo 102
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Narrow-Gap Improved Electroslag Welding for Bridges
FHWA Demonstration Project, DP-102
Background: The objective of this Federal Highway Administration (FHWA) Demonstration Project 102 (DP-102) "Narrow-Gap Improved Electroslag Welding for Bridges" is to introduce a modified version of a productive welding process for joining thick plates or other thick-wall components. The expected audience includes State Highway Agency bridge engineers, welding engineers, welding inspectors, operators, steel bridge fabricators, consultants, FHWA representatives, and others.
On October 27, 1977, the Federal Highway Administration instructed all Field Offices that the electroslag welding process would not be used on tension members of steel bridges constructed with Federal-aid highway funds. In the 1980s, the FHWA launched a comprehensive research program that developed a modified electroslag welding process, called the "Narrow-Gap Improved Electroslag Welding" (NGI ESW) technique. This new technique significantly improves the properties of the electroslag welds. This new process has had extensive field trials to confirm research findings and it is expected that the FHWA will approve the use of the process for welding tension and compression members of steel bridges in the foreseeable future.
Eighteen (18) NGI ESW workshops will be presented during 1999 and 2000 at various locations around the Nation. States with workshops will be added to this web site as the project develops.
PURPOSE OF THIS WEB PAGE:
The purpose of this web site is to provide information on locations of the NGI ESW workshops. You may request additional information or a slot in one of the workshops from this web site, or by calling the site workshop coordinator. To view workshop information, select the link below, "Workshop Site Map" then select the specific state. Additional information on DP-102 is available from the Project Manager: Mr. Krishna Verma fax: 202-366-3077 or email: krishna.verma@fhwa.dot.gov.
View the DP-102 announcement memorundum and project flyer. If a state is interested in hosting the workshop, Host Site Facility Requirements are also available from this site.
Narrow-Gap Improved Electroslag
Welding Process (Front View)
Narrow-Gap Improved Electroslag
Welding Process (Side View)
Close-up View of Consumable Guide
Flux Feeding System and Copper
Shoes During Welding
Continuous Monitoring of Voltage
and Amperage During Welding
