|To:||email@example.com, firstname.lastname@example.org, email@example.com|
|Subject:||[TowerTalk] Rohn 25/Crankup loading|
|From:||"Pat Barthelow" <firstname.lastname@example.org>|
|Date:||Sat, 29 Jan 2005 10:13:37 -0800|
From: "Hank Lonberg" email@example.com Said: Malcolm:
I notice something different also, in how/where the load is carried on each section of a crankup. Assuming no blocks installed, and the lift cable carrying the total load of the elevated tower sections, the load is not carried down the corners of the tower, at least not directly. It is applied at single point sources in each tower section, namely the cable pulley axle bolts, in my tower, located on the side of the tower trellis work. The corner joints of the tower 'float'. That is, there is no direct downward transfer of stress though the three corner tubes of the tower. Does this single point source of loading change any basic dynamics of load transfer down the tower structure?
73, DX, de Pat Barthelow AA6EG (831) 646-0388 firstname.lastname@example.org
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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