[TowerTalk] self-supporting rohn 25g??

[Martin & Ann Mein]

Hi all,
Can anyone tell me if it's OK to install a 40' tower, made from four 10-foot sections of Rohn 25G, as a self-suppoting tower?  The antenna that wpould be on the tower is a small omni-directional circularly-polarized FM antenna for 95.9 MHZ, so it is small with not much windload.  How big does the cement base have to be?  Locally, the minimum concrete order is 4 yards.  We are located in upstate NY.  4 yards would be somewhere around a 4.5' X 4.5' X 5.5' foot base.
Thanks and 73...
Jeff KP3FT
Spirit And Truth Christian Radio  WJIH-LP  95.9