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Sectional Steel Poles Through the Years
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Here's some maker tags of some sectional steel poles (aka big round MTO poles) over the years.
After a quick search online, it looks like these poles were originally made by Lacal Industries probably in the 1960s. Lacal was then acquired by Joslyn Industries in 1973, and the PoleFab name was from 1984 onwards (see here and here).
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