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Re: structural welding

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On a seismic retrofit of a 1890's era steel frame building, we found that
the steel metallurgy was different from modern steel and decided that,
rather than going through the AWS D1.1 qualification procedure to develop a
welding procedure specification for the project, to use slip-critical bolted

With steel that was not made to a modern standard, even if a good-looking
weld can be made, it may not have the strength that you expect.

Nels Roselund
Structural Engineer
South San Gabriel, CA

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