[TowerTalk] Unitary tower strength

[Don Rasmussen]

Hello All, 
Have a 30 foot aluminum tower mounted to a steel base in concrete. 
Would like to install a crankup mast in it's place.  Maybe a concrete bolt at the base of the crankup and use a house mount a few feet up against the old tower. 
If I cut the base tower section in half, wondering if what is left might be sturdy enough to bolt the crankup mast up against, or if the remaining base section would be so compromised by cutting it that it wouldbe worthless to use as a support.  Section could be cut just abovea set of horizontal cross members. 
Would be interested in any comments on this, or ways of convertinga Universal Tower 4-30 base output lugs into something strong enough to support the sway from a 30 foot crankup mast. 
de Wb8yqj Don