One of our customers had an aging 250' tall steel stack. This stack has corroded and rusted to the point of failure. At this point in their budgets the customer wasn't able to replace the stack. We proposed a series of metal plates welded to the existing stack to shore up all of the cracks and failures. UT testing was done to determine what size plate was needed to connect thick areas of the existing stack to provide maximum strength and support. Welding off rope was a difficult procedure, but ultimately significantly cheaper than crane rental for the length of the project. In the end over 25 plates were welded and the access ladder was reattached for access for EPA and other such environmental engineers.
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