Depends on the type of soil you have. Straight Piers are cheap and less cash if you can get the Permit without a soils test. If they ask for a soils test or a Drilled Bell Bottom Pier... I would (as I have many times in the past) change the tower mounting over to a base block, which should not normally require a soils test.
Oh, fun dealing with the Permit Process... sometimes the hardest part is getting the PE to actually talk to the County Guy/Gal one-on-one. cheers, s. > "rahwayflynn" <mafl...@...> wrote: > > One of my family members is putting up a tower to support his business radio > (farm) , the family GMRS repeater, and a fairly large microwave dish to > obtain internet. The choice so far is a Rohn SSV compromised of the > following sections: 10NH, 9NH, 8N, 7N, and 6N. > > Here the question: The local PE who approved the prints suggested using > drilled belled foundations. This nearly doubles the cost of each foundation > in terms of drilling and concrete. Typically how much additional resistance > to overturning motion do they add above straight sided holes? >
