I worked on towers for a while, you dont need IRATA, SPRAT or a highschool education. Just low self esteem and the ability to put a value on your life that aint very high.
The work was fun for a while, but it soon becomes repetitive and soulless. The climbing becomes the worst part and you soon loathe it, the rigging becomes predictable and uniteresting. The views are great, and generally its pretty quiet. The exposure can be horrible: heat, rain, cold, sun, snow, wind its all amplified 100x on the tower it seems. Generally speaking it means 15-30/hr, lots of travel, long hours, hotel rooms, and $25 a day per diem.
I would like to be able to go back and work maybe 1 month a year doing it, just to get the altitude. It could never be a career for me.