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U.S. Department
of Transportation

Federal Highway
Administration

 Office of Technology Applications
Office of Engineering/Bridge Division

Narrow-Gap Improved Electroslag Welding
for Bridges

Demonstration Project No. DP-102

The objective of the Federal Highway Administration's (FHWA's) 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 will include State Department of Transportation (DOT) bridge engineers, welding engineers, welding inspectors, operators, steel bridge fabricators, consultants, FHWA representatives, and others.

In the 1980s, the FHWA launched a comprehensive research program that developed a modified electroslag welding (ESW) process

electroslag welding - Narrow-Gap Improved Electroslag Welding Process<br>(Front View)
Narrow-Gap Improved Electroslag Welding Process
(Front View) 		called the Narrow-Gap Improved Electroslag Welding (NGI ESW) technique. This new technique significantly improved the properties of the electroslag welds. Upon completion of the research, extensive field trial were made to confirm research findings of the new ESW technology

electroslag welding - Narrow-Gap Improved Electroslag Welding Process<br>(Side View)
Narrow-Gap Improved Electroslag Welding Process
(Side View)

DP-102 Flyer Side #2 | Demo 102 Home

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United States Department of Transportation - Federal Highway Administration - Office of Bridge Technology