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Re: monopole antenae retrofit

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I have a question about monopoles used for cellular antenna carriers. Has 
anyone ever had to take an existing monoplole structure and camouflage it 
with "branches" to make it look like a tree? Can such a retrofit be 
accomplished when the existing monopole was originally designed without these 
"branches"?  A cell carrier has been asked by a municipality to do this if 
they wish to increase the height of the existing monopole from 80 to 130 feet 
however the cellular company has come back with "Structurally, it cannot be 
accomplished". Is it a structural problem or more of an economical one? Is 
anyone familiar with these monopole structures and can't they be modified to 
support the additional loads? If so, how?

John G., PE
Garrison, NY