[TowerTalk] Stub mast strengthening

[Chris]

Don't forget that strengthening the mast so it won't bend means that force is now presented elsewhere, i.e., on the tower itself.  Make sure the tower can handle it.

Chris
KF7P








On Apr 16, 2013, at 12:44 PM, Grant Saviers wrote:

> Sleeving works, UST sells 20' x 2" x 1/8 wall steel masts with the lower 10' sleeved to 1/4".  With a 2.5" od (what is "thick wall" and what is the alloy and temper?) you potentially have a very strong mast.   What is the load?  Try one of the mast calculators before sleeving.  (ARRL, K7LXC)  or free by WD6P
> http://www.math.niu.edu/KARC/mast/
> 
> Grant KZ1W
> 
> 
> On 4/16/2013 8:31 AM, GW4BLE wrote:
>> I have a question concerning 'sleeving' (can't think of a better way to describe it) -  I have a 16' x 2.5" OD thick-wall aluminium tube that will be used as a stub mast, would inserting 6' x 2" OD thick-wall aluminium  tube into the bottom of the tube add to its' 'strength' in any way or would it just add unnecessary weight?
>> Sliding it in makes quite a snug fit, but not exactly 'tight'
>> 
>> Steve
>> GW4BLE
>> 
>> Sent from my iPhone 4S
>> 
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