[TowerTalk] Stub mast strengthening

[K7LXC at aol.com]

>  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' 
 
Hiya, Steve --
 
    Long time no see. Hope you're doing great!
 
    What you're describing is a perfectly appropriate  thing to do. It 
doesn't have to be a tight fit in order to work. The bending  moment will be at 
the top of the tower where the mast exits so that's the best  place to 
reinforce.
 
Cheers & GL,
Steve      K7LXC
TOWER TECH