Rohn bolts for 25 are fine threaded and are grade 5. However, they usually
turn to rust in a short period of time.
My advice for guys putting up short tower (40-50) is to pick up galvanized
bolts at the local hardware store.
I'm no engineer, but the downward force of 200 lb. of tower and some guy
tension is not going to shear the bolts. I've seen a fair amount collapsed
and have never seen any bolt shear.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list