|To:||EL34GUY@aol.com, TowerTalk <firstname.lastname@example.org>|
|Subject:||Re: [TowerTalk] self supporting tower question|
|Date:||Sat, 01 Jan 2005 19:12:06 -0600|
If you deviate from the recommended installation specifications, especially if you with to make it less capable of supporting your tower, get a competent engineer to analyze it. If anyone might be hurt or suffer property damage if it falls over, get a competent engineer to certify that the change does not create an unacceptable risk.
A commonly used assumption for determining the capacity of a tower base is to make the total weight, of base, tower, antennas, and the rest, times the minimum radius of the base greater than the maximum overturning moment (sum of forces times moment arms). Add to this an asumption that the base is totally "floated" in the ground. This method of calculating capacity generally provides a safe design without the cost and complexity of having an engineer measure soil characteristics and calculate capacity based on soil resistance.
Your total cost, or the amount you lose if it falls over, is usually much greater than the amount you can save by pouring less concrete.
Happy New Year es 73 WOØW
Happy New Year to everyone,
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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