Frank, regarding long masts in marginal towers: I have a short program that
gives the amount of twist in a mast given its length, diam, wall, type
material and load. It is available for the asking.
One of my universal rules is "masts are never a substitute for tower
sections". After all is said and done, tower sections are more cost effective
than equivalent strength slender masts. There is no profit motive here as
tower sections are much less profitable for us than masts!
73 de Gerald Williamson, K5GW, Owner/General Manager, Texas Towers
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