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Old 20-Jun-2020, 4:54 PM   #25
Tower Guy
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Join Date: Dec 2009
Location: Delmar, NY
Posts: 1,195
Originally Posted by Tim View Post
I use EMT for masts all the time for TV and ham radio use. Just be aware that the outside diameter is larger than the trade size designator of the EMT.
EMT works fine for very short masts. For longer masts top rail is preferred. This is because the steel used in EMT has a yield strength of 30,000 PSI. The steel in top rail is rated at 50,000 PSI.

Note that pipe is also rated at 30,000 PSI, but is available in wall thicknesses that can make up some of the weakness of lower strength steel.
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